Logic ICs
Products (54)
SN74CBT3245ADWR - Octal FET Bus Switch | Texas Instruments
The SN74CBT3245ADWR is an octal FET bus switch from Texas Instruments, designed for high-speed TTL-compatible bus switching. It provides eight bits of switching with a standard 245-type pinout, available in a 20-pin SOIC (DW) package. The device features a low on-state resistance, allowing connections with minimal propagation delay, and is organized as one 8-bit switch with a single output enable (OE) control input. A FET bus switch is a type of analog switch that uses MOSFET transistors to connect or disconnect signal paths. It is commonly used in bus isolation, hot-swapping, and signal routing applications. The SN74CBT3245A belongs to the CBT family of bus switches, which are optimized for low capacitance and high bandwidth, making them suitable for high-speed digital systems. Key features include a wide operating voltage range of 4.5V to 5.5V, a low on-state resistance of typically 5 ohms, and a propagation delay of less than 250 ps. The device supports bidirectional switching, allowing signals to pass in either direction, and includes an OE pin that, when low, enables the switch. The SN74CBT3245ADWR is RoHS compliant and operates over a temperature range of -40°C to +85°C. Technically, the SN74CBT3245A uses a CMOS process to achieve low power consumption and high-speed performance. The switch is designed to handle TTL-level signals and provides a low-capacitance path, minimizing signal distortion. The device is available in multiple package options, including SOIC, SSOP, TSSOP, and TVSOP, all with the standard 245 pinout, facilitating easy board layout. Typical applications include bus isolation in microprocessor systems, hot-swap and power-down isolation, and signal routing in networking and telecommunications equipment. The low on-state resistance and high bandwidth make it ideal for high-speed data buses, such as those found in servers and switches. When designing with this device, ensure that the OE pin is properly controlled to avoid bus contention. The device is not suitable for applications requiring high current handling, as it is designed for signal switching rather than power switching. For more detailed information, refer to the TI datasheet.
SN74CBTLV3257PWR - 4-Channel 2:1 Analog Switch | Texas Instruments
The Texas Instruments SN74CBTLV3257PWR is a low-voltage 4-bit 1-of-2 FET multiplexer/demultiplexer designed for 3.3-V operation. It provides four independent 2:1 (SPDT) analog switch channels in a compact 16-pin TSSOP (PW) package, enabling high-speed signal routing with minimal propagation delay and low ON-state resistance. A multiplexer/demultiplexer is a digital switch that routes one of multiple input signals to a common output (or vice versa). The SN74CBTLV3257 belongs to the CBTLV family of bus switches, which are optimized for low capacitance and low ON-resistance to preserve signal integrity in high-speed digital and analog applications. As a FET switch, it uses a pass-gate architecture to achieve bidirectional signal flow without adding significant distortion or delay. Key features include a typical ON-state resistance of 5 Ω, a wide operating voltage range of 2.3 V to 3.6 V, and a partial-power-down mode that places the outputs in a high-impedance state when VCC is 0 V. The device also features over-voltage tolerant inputs and outputs, allowing signals up to 5 V to be applied even when the supply is lower. The 16-pin TSSOP package measures 5 mm × 6.4 mm with a 0.65-mm pitch, making it suitable for space-constrained PCB layouts. The SN74CBTLV3257 uses a standard CMOS process with a pass-gate architecture, providing bidirectional switching with low propagation delay (typically 0.25 ns) and minimal crosstalk. The device includes an output-enable (OE) pin that, when driven low, places all outputs in a high-impedance state, facilitating bus isolation and power sequencing. The select (S) pin controls the routing of each channel between its A and B inputs. Typical applications include signal routing in networking equipment, data acquisition systems, and test instrumentation. The low ON-resistance and high bandwidth make it ideal for switching high-speed digital signals, while the partial-power-down mode supports hot-swap and power-sequencing requirements in multi-rail systems. When designing with this device, ensure the OE pin is tied to VCC through a pull-up resistor to maintain high-impedance outputs during power-up or power-down, as recommended in the NXP datasheet. This prevents unintended signal contention and ensures reliable system initialization.
SN74F27 - Triple 3-Input NOR Gate | Texas Instruments
The SN74F27 is a triple 3-input positive-NOR gate from Texas Instruments, part of the 74F family of bipolar logic devices. It operates from a 4.5-V to 5.5-V supply and is characterized for operation from 0°C to 70°C. The device contains three independent 3-input NOR gates that perform the Boolean function Y = A + B + C in positive logic. Available in multiple package options including SOIC, PDIP, and ceramic DIPs, the SN74F27 is designed for high-speed logic applications where propagation delay and output drive are critical. A NOR gate is a digital logic gate that outputs a HIGH signal only when all of its inputs are LOW. In the context of logic families, the 74F series is a high-speed bipolar family that offers a balance between speed and power consumption, making it suitable for applications that require fast switching without the higher power of ECL. The SN74F27 is a fundamental building block in digital systems, used to implement logic functions, combinational circuits, and as a component in larger integrated systems. Key features of the SN74F27 include a typical propagation delay of 5.5 ns, which enables high-speed operation in clocked systems. The device provides a standard TTL-compatible output that can drive up to 20 mA, allowing direct connection to other TTL logic or LEDs. The wide operating voltage range of 4.5 V to 5.5 V ensures compatibility with 5-V logic systems, and the device is available in industry-standard packages such as SOIC-14 and PDIP-14, facilitating easy PCB integration. Technically, the SN74F27 uses a bipolar junction transistor (BJT) process, which provides high output drive capability and fast edge rates. The device features a totem-pole output stage that can source and sink current, ensuring robust signal integrity in noisy environments. The input structure includes clamping diodes for ESD protection, and the device is designed to meet the JEDEC standard for TTL logic levels, ensuring interoperability with other 74-series logic. Typical applications for the SN74F27 include address decoding in memory systems, logic function generation in control units, and as a building block in arithmetic logic units (ALUs). Its high speed makes it suitable for data path logic in processors and digital signal processing circuits. The device is also used in test and measurement equipment where precise timing is required. When designing with the SN74F27, it is important to ensure proper decoupling of the power supply with a 0.1-µF capacitor placed close to the VCC pin. Unused inputs should be tied to a defined logic level, either VCC or GND, to prevent floating inputs that can cause excessive power consumption and unpredictable behavior. The device's output can drive up to 20 mA, but for higher current loads, a buffer or driver should be used.
SN74HC109 - Dual J-K Flip-Flop with Clear/Preset | TI
The SN74HC109 is a dual J-K positive-edge-triggered flip-flop with clear and preset, manufactured by Texas Instruments. It operates over a wide voltage range of 2V to 6V, features low input current of 1 µA max, and can drive up to 10 LSTTL loads. Available in multiple packages including 16-pin DIP (N), SOIC (D), and SOP (NS). A J-K flip-flop is a sequential logic device that toggles its output based on the J and K inputs at the rising edge of the clock. It is a fundamental building block in digital electronics, used for counters, registers, and state machines. The SN74HC109 belongs to the 74HC family of high-speed CMOS logic, which combines the speed of LSTTL with the low power consumption of CMOS. Key features include two independent flip-flops with preset (PRE) and clear (CLR) inputs, positive-edge triggering, and a typical propagation delay of 12 ns. The device operates from 2V to 6V, with a maximum quiescent current of 40 µA, making it suitable for battery-powered applications. The outputs can drive up to 10 LSTTL loads, ensuring compatibility with TTL logic. The SN74HC109 uses high-speed CMOS technology, providing a balanced combination of speed and power efficiency. The positive-edge-triggered design ensures predictable timing behavior, while the asynchronous PRE and CLR inputs allow immediate setting or resetting of outputs regardless of clock state. This makes it ideal for applications requiring reliable state control. Typical applications include digital counters, frequency dividers, shift registers, and control logic in industrial automation, consumer electronics, and communication systems. Its wide voltage range and low power consumption make it suitable for portable and battery-operated devices. When designing with the SN74HC109, ensure proper decoupling of the power supply with a 0.1 µF capacitor near the VCC pin. Unused inputs should be tied to VCC or GND to avoid floating states. The setup and hold times must be respected to guarantee reliable operation.
SN74HC21-Q1 - Dual 4-Input AND Gate, 2-6V | TI
The Texas Instruments SN74HC21-Q1 is an automotive-qualified dual 4-input positive-AND gate in the HC (High-Speed CMOS) logic family, operating from a wide 2 V to 6 V supply with 5.2 mA output drive strength. The device contains two independent 4-input AND gates performing the Boolean function Y = A • B • C • D in positive logic, and is AEC-Q100 qualified for automotive applications. A logic gate is the fundamental building block of digital circuits, performing a Boolean operation on one or more binary inputs to produce a single binary output. Within the logic IC hierarchy, the AND gate family, the 74HC High-Speed CMOS series, and the broader CMOS logic category place this device among the most widely standardized components in electronics. The HC family combines CMOS low static power with TTL-like speed, making 74HC devices broadly interchangeable across semiconductor vendors. Key features include a wide 2 V to 6 V operating range supporting 3.3 V, 5 V, and mixed-voltage automotive rails, a typical propagation delay of 11 ns at 5 V, and ±4 mA output drive at 5 V allowing the outputs to drive up to ten LSTTL loads. Input current is extremely low at 1 uA maximum, and quiescent supply current is only 20 uA maximum, minimizing standby power in always-on automotive modules. Technically, the device uses HC CMOS architecture with rail-to-rail CMOS input thresholds, providing high noise immunity (typically 28% of VCC) and balanced drive. The automotive catalog variant is characterized across the extended AEC-Q100 temperature range with enhanced process controls and documentation. Typical applications include safety-interlock gating in automotive body modules, enable gating for power sequences, sensor qualification logic in ADAS perception modules, and general glue logic in ECU, gateway, and instrument-cluster boards. Design tip: tie all unused gate inputs to VCC or GND - never leave CMOS inputs floating, or both transistors can conduct and increase current draw. Keep decoupling (100 nF) close to VCC pin 14 for switching-transient control.
SN74HC4060 - 14-Stage Binary Counter & Oscillator | TI
The SN74HC4060 is a 14-stage asynchronous binary counter with an integrated oscillator section, manufactured by Texas Instruments. It operates over a wide voltage range of 2V to 6V, features a typical propagation delay of 14 ns, and can drive up to 10 LSTTL loads. The device is available in multiple package options including 16-SOIC (D), 16-PDIP (N), and 16-TSSOP (PW), making it suitable for a variety of PCB layouts. A binary counter is a digital circuit that counts in binary sequence, incrementing on each clock pulse. The SN74HC4060 specifically is an asynchronous (ripple) counter, meaning each stage's output triggers the next, resulting in a simple but effective frequency division. It belongs to the 74HC family of high-speed CMOS logic, which combines the low power consumption of CMOS with the speed of TTL. The oscillator section allows the device to generate its own clock signal using either an RC network or a crystal, eliminating the need for an external clock source. Key features include a 14-stage ripple-carry binary counter, an integrated oscillator supporting RC or crystal configurations, a master reset (CLR) input that disables the oscillator and clears the counter, and a clock input (CLKI) that increments the counter on high-to-low transitions. The device also offers a low input current of 1 µA max and a low power consumption of 80 µA max ICC, making it ideal for battery-powered applications. Technically, the SN74HC4060 uses high-speed CMOS technology, providing a balanced combination of speed and power efficiency. The oscillator section can be configured with external components to generate frequencies from sub-Hz to several MHz, depending on the RC or crystal values. The counter stages divide the oscillator frequency by powers of two, allowing precise frequency division for timing applications. The clear function ensures the counter can be reset to zero at any time, which is essential for synchronized operations. Typical applications include frequency dividers, timers, and oscillator circuits in consumer electronics, industrial control systems, and communication devices. For example, it can be used to generate precise time delays in microcontroller systems or to divide a crystal oscillator frequency down to a usable clock for peripherals. Its wide operating voltage range and robust output drive make it compatible with both 3.3V and 5V logic systems. When designing with the SN74HC4060, ensure that the oscillator components are placed close to the IC to minimize parasitic capacitance and noise. For crystal oscillators, use the recommended load capacitors as specified in the datasheet. Also, consider the counter's asynchronous nature, which may introduce glitches on outputs; adding output flip-flops can synchronize the count if needed.
SN74HCS541PWR - Octal Buffer, Schmitt-Trigger, 2-6V | TI
The Texas Instruments SN74HCS541PWR is an octal buffer and line driver with Schmitt-trigger inputs, 3-state outputs, and a flow-through pinout, supplied in a 20-pin TSSOP (PW) package. It operates over a wide 2 V to 6 V supply range and is fully specified from -40C to +125C. What is an octal buffer/line driver? It is a digital logic IC providing eight independent buffer channels capable of driving bus lines or long PCB traces. The 3-state outputs allow each device to release the bus into a high-impedance state, enabling multi-device bus sharing, while Schmitt-trigger inputs add hysteresis that converts slow or noisy input edges into clean logic transitions. The SN74HCS541 belongs to the HC (High-speed CMOS) logic family, combining CMOS low power with TTL-compatible drive. Key features include the 2 V to 6 V operating range for 3.3 V/5 V mixed-voltage systems, typical 0.4 V input hysteresis at 4.5 V for superior noise immunity, dual active-low output enables (OE1 and OE2, both must be low to activate outputs), and only 20 uA typical quiescent current at 6 V. Outputs sink or source up to 6 mA at 4.5 V, suitable for driving LEDs, relays, or additional logic inputs. Fabricated in silicon-gate CMOS, the device balances switching speed with low power dissipation. The flow-through pinout places inputs on one side and outputs on the opposite side, simplifying PCB routing and reducing crosstalk in bus-oriented layouts. Typical applications include microcontroller bus buffering, memory address/data line driving, sensor signal conditioning, and interfacing 3.3 V logic to 5 V domains in industrial automation and automotive-adjacent systems. Design tip: control the OE pins carefully to avoid bus contention, place 0.1 uF decoupling capacitors close to VCC/GND, and keep input rise times below 500 ns at 2 V and 200 ns at 6 V for best performance.
SN74HCS86PWR - Quad 2-Input XOR Schmitt Trigger | TI
The Texas Instruments SN74HCS86PWR is a quadruple 2-input XOR (exclusive OR) gate with Schmitt-trigger inputs, supplied in a 14-pin TSSOP (PW) surface-mount package. It operates from a 2V to 6V supply and is fully specified from -40C to +125C for industrial environments. A logic gate is the fundamental building block of digital electronics, performing Boolean operations on binary inputs. The XOR gate outputs a high level only when an odd number of its inputs is high, making it essential for adders, parity generators/checkers, comparators, and programmable inverters. The SN74HCS86 belongs to the HCS family, which pairs CMOS low static power with Schmitt-trigger inputs for superior noise immunity. Key features include the wide 2V to 6V operating range, Schmitt-trigger inputs with hysteresis (typically around 0.5V at 5V supply), CMOS technology for low quiescent power, and balanced output drive. The device can drive loads up to 50 pF while meeting all datasheet specifications; larger loads are not recommended per TI documentation. The high input hysteresis allows slow, noisy, or analog-like edges to be converted into clean, fast digital transitions without multiple triggering. Technically, the CMOS architecture provides high noise margins and negligible static current, while the Schmitt inputs use internal positive feedback to create hysteresis. This makes the part tolerant of inputs from mechanical switches, encoders, RC oscillators, and long wires with slow rise times - conditions that would cause a standard HC86 input to oscillate. Typical applications include signal conditioning of noisy sensor or switch inputs, parity generation in serial communication links, crystal/RC oscillator circuits, frequency doubling (XOR with a delayed copy of itself), and digital comparator functions in industrial control and instrumentation. Design tip: tie all unused inputs to a defined logic level (GND or VCC) to prevent floating nodes, and keep total capacitive load per output at or below 50 pF; add a buffer if heavier loads are required.
SN74HCT74 - Dual D-Type Flip-Flop with Clear/Preset | TI
The SN74HCT74 is a dual D-type positive-edge-triggered flip-flop from Texas Instruments, featuring clear and preset inputs. It operates over a supply voltage range of 4.5V to 5.5V, making it compatible with TTL logic levels. The device is available in multiple package options including 14-pin DIP (N), SOIC (D), and TSSOP (PW), with the SN74HCT74N being a common through-hole variant. A D-type flip-flop is a fundamental sequential logic element that stores one bit of data. On the rising edge of the clock signal, the output (Q) takes the value of the data input (D). The SN74HCT74 contains two independent flip-flops, each with preset (PRE) and clear (CLR) inputs that asynchronously set or reset the outputs regardless of clock state. This makes it essential for building registers, counters, and state machines in digital systems. Key features include a wide operating voltage range of 4.5V to 5.5V, low power consumption with a maximum ICC of 40 µA, and the ability to drive up to 10 LSTTL loads. The typical propagation delay (tpd) is 15 ns at 5V, and the output drive capability is ±4 mA. The device is fully specified for operation from -40°C to 85°C, making it suitable for industrial applications. The SN74HCT74 uses HCT (High-Speed CMOS with TTL-compatible inputs) technology, which combines the low power of CMOS with the input thresholds of TTL. This allows direct interfacing with TTL logic without additional level shifting. The positive-edge-triggered design ensures reliable data capture, and the asynchronous preset and clear inputs provide flexible control for initialization and reset operations. Typical applications include data storage registers, frequency dividers, and control logic in microcontrollers, industrial automation, and consumer electronics. The device is also used in debouncing circuits and as a building block for more complex sequential logic. Its TTL compatibility makes it ideal for mixed-voltage systems. When designing with the SN74HCT74, ensure that the setup and hold times are met relative to the clock edge. The preset and clear inputs are active-low and should be tied high when unused. Decouple the power supply with a 0.1 µF capacitor near the VCC pin to minimize noise.
SN74LS138 - 3-to-8 Line Decoder/Demultiplexer | Texas Instruments
The SN74LS138 is a 3-line to 8-line decoder/demultiplexer from Texas Instruments, part of the 74LS family of Schottky-clamped TTL MSI circuits. It is designed for high-performance memory decoding and data-routing applications requiring very short propagation delay times. The device features three binary select inputs (A, B, C), three enable inputs (G1, G2A, G2B), and eight active-low outputs (Y0-Y7). It operates from a 5V supply and is characterized for operation from 0°C to 70°C. A decoder is a combinational logic circuit that converts binary information from n input lines to a maximum of 2^n unique output lines. The 3-to-8 decoder is a fundamental building block in digital systems, used to select one of eight devices or functions based on a 3-bit address. It is a type of MSI (medium-scale integration) logic device, which sits between SSI (small-scale integration) gates and LSI (large-scale integration) circuits in the digital logic hierarchy. Decoders are essential in memory address decoding, where they enable specific memory chips based on address lines. Key features of the SN74LS138 include a typical propagation delay of 20 ns, low power consumption typical of LS TTL (about 32 mW), and active-low outputs that can sink up to 8 mA. The three enable inputs provide flexibility for cascading multiple decoders to create larger decoders (e.g., 4-to-16) and for enabling/disabling the device based on control signals. The Schottky-clamped TTL technology ensures high speed and noise immunity. The SN74LS138 is available in multiple package options, including the 16-pin PDIP (N), SOIC (D), and SOP (NS). The most common variant is the SN74LS138N in a 16-PDIP package, which is widely used in breadboards and through-hole designs. The device is fully TTL-compatible, making it easy to interface with other 74LS, 74ALS, and 74AS logic families. Typical applications include memory chip select decoding in microprocessor systems, address decoding in peripheral interfaces, and data routing in multiplexed systems. It is also used in demultiplexing applications where a single data line is routed to one of eight outputs based on the select inputs. When designing with the SN74LS138, ensure that the enable inputs are properly connected: G1 must be high, and G2A and G2B must be low for the decoder to be active. Unused inputs should be tied to appropriate logic levels to avoid floating nodes. The outputs are active-low, so they can directly drive active-low chip select inputs on memory devices.
SN74LS145 - BCD-to-Decimal Decoder/Driver | Texas Instruments
The SN74LS145 is a monolithic BCD-to-decimal decoder/driver with open-collector outputs, designed to accept BCD inputs and provide appropriate outputs to drive 10-digit incandescent displays. It consists of eight inverters and ten four-input NAND gates, with the inverters connected in pairs to make BCD input data available for decoding by the NAND gates. Full decoding of valid BCD input logic ensures that all outputs remain off for all invalid binary input conditions. The device is available in a 16-pin PDIP package with through-hole mounting, making it suitable for legacy and new designs requiring high-voltage, high-current sinking capability. A BCD-to-decimal decoder is a combinational logic circuit that converts a 4-bit binary-coded decimal (BCD) input into one of ten decimal outputs. The SN74LS145 is a specific implementation that includes open-collector output transistors capable of sinking up to 80 mA at 15 V, allowing direct drive of relays, incandescent lamps, and other high-current loads. This decoder/driver sits within the broader hierarchy of digital logic ICs, specifically within the 74LS family of low-power Schottky TTL devices, which are known for their speed and compatibility with TTL, DTL, and MOS logic levels. Key features of the SN74LS145 include high-breakdown output transistors rated at 15 V, each capable of sinking up to 80 mA of current. Each input is one Series 54/74 or Series 54LS/74LS standard load, ensuring easy interfacing with other TTL logic. The open-collector outputs allow wired-OR connections and level shifting, providing design flexibility. The device operates over a wide supply voltage range and is compatible with standard TTL power supplies (5 V). The SN74LS145 uses low-power Schottky (LS) technology, which reduces power dissipation compared to standard TTL while maintaining high speed. The open-collector outputs are implemented with high-voltage transistors, enabling the device to drive loads connected to higher voltage rails (up to 15 V) while the logic operates at 5 V. This architecture is particularly useful in industrial control and display applications where loads require higher voltages than the logic supply. Typical applications include driving incandescent displays, relay drivers, and other high-current loads in industrial control systems, test equipment, and consumer electronics. The device is also used in BCD-to-decimal decoding for seven-segment displays, though it requires external current-limiting resistors. Its ability to sink 80 mA per output makes it suitable for driving relays and lamps directly, reducing the need for additional driver transistors. When designing with the SN74LS145, ensure that the output load current does not exceed the 80 mA rating and that the output voltage does not exceed 15 V. Pull-up resistors may be required when driving logic inputs from the open-collector outputs. The device is not recommended for new designs due to its obsolescence, but it remains available for legacy system maintenance.
SN74LV240A - Octal Inverting Buffer/Driver 3-State | TI
The SN74LV240A is an octal inverting buffer/line driver with 3-state outputs from Texas Instruments, designed for 2-V to 5.5-V VCC operation. It provides 8 mA of drive current at 3.3 V, making it ideal for bus interface applications where data retention or latching is required. The device features inverted outputs and is optimized for 3-state memory address drivers, clock drivers, and bus-oriented receivers/transmitters. An octal buffer/driver is a digital integrated circuit that provides eight independent buffering channels, each capable of driving a bus line with high current and low output impedance. The 3-state outputs allow the device to be disconnected from the bus (high-impedance state) when not active, enabling multiple devices to share the same bus without contention. This category sits within the logic IC family, specifically under buffers/drivers, which are essential for signal conditioning and bus isolation in digital systems. Key features include a wide operating voltage range of 2 V to 5.5 V, low power consumption typical of LV CMOS technology, and high drive capability of 8 mA at 3.3 V. The device supports mixed-mode voltage operation on all ports, allowing interfacing between different voltage domains. It also features latch-up performance exceeding 250 mA per JESD 17 and robust ESD protection, ensuring reliability in harsh environments. The SN74LV240A is fabricated using low-voltage CMOS technology, which provides a balance between speed and power dissipation. The 3-state outputs are controlled by an output-enable (OE) input, allowing the outputs to be placed in a high-impedance state for bus sharing. The inverting outputs provide signal inversion, which can simplify logic design in certain applications. The device is available in multiple package options, including SOIC, SSOP, and TSSOP, offering flexibility for various PCB layouts. Typical applications include memory address drivers, clock drivers, bus-oriented receivers/transmitters, and general-purpose digital interfacing. The low drive current and low noise characteristics make it suitable for low-noise applications where signal integrity is critical. The wide voltage range allows operation in both 3.3-V and 5-V systems, making it a versatile choice for mixed-voltage designs. When designing with the SN74LV240A, ensure proper decoupling capacitors are placed near the VCC and GND pins to minimize power supply noise. The OE pin should be tied to a defined logic level to avoid floating outputs, which can cause excessive power consumption or bus contention. Consider the propagation delay and output transition times when interfacing with high-speed buses to avoid timing violations.
SN74LV3T99-Q1 - Automotive Configurable Logic Gate | TI
The Texas Instruments SN74LV3T99-Q1 is an automotive-grade, ultra-configurable multiple-function gate containing three independent configurable logic gates with 3-state outputs. Each gate has four inputs and implements the Boolean function Y = (A • /C + B • C) ⊕ D. All inputs include Schmitt-triggers, eliminating erroneous data outputs caused by slow-edged or noisy input signals. The device operates from 1.8V to 5.5V and is available in a 20-pin TSSOP (PW) package, with a 20-pin VSSOP (DGS) variant also offered. The -Q1 suffix denotes AEC-Q100 qualification for automotive applications. Configurable logic gates are digital integrated circuits that let designers implement multiple logic functions using a single device, configured by pin strapping. They belong to the broader category of standard logic ICs - fundamental building blocks providing glue logic, level shifting, and signal conditioning in digital systems. The SN74LV3T99-Q1 sits within the LV (Low-Voltage) CMOS family, optimized for low-power, high-speed operation, and also functions as a logic-level shifter between voltage domains. Key features include three independent four-input gates with 3-state outputs for bus-oriented applications, Schmitt-trigger inputs providing hysteresis for superior noise immunity, and a wide 1.8V to 5.5V supply range enabling level translation between 1.8V, 2.5V, 3.3V, and 5V logic families. AEC-Q100 qualification guarantees reliable operation from -40C to +125C, meeting stringent automotive reliability requirements. Technically, the device uses CMOS technology for low static power consumption and high noise immunity. The configurable architecture replaces multiple discrete gates with one device, reducing board space and BOM count. The Boolean function supports multiplexer, comparator, and arithmetic building blocks, while the 3-state output enable permits multiple devices to share a common bus with a high-impedance isolation state. Typical applications include automotive body control modules, infotainment systems, and industrial automation, where the device handles signal conditioning, level shifting, and custom logic. The Schmitt-trigger inputs reliably interface sensors, switches, and microcontrollers in noisy environments. Test and measurement equipment also uses configurable logic for signal routing and control. Design tip: place 0.1uF decoupling capacitors close to the power pins; the 3-state outputs require careful output-enable control to avoid bus contention.
SN74LVC1G08DBVR - 2-Input AND Gate 1.65-5.5V | TI | SOT-23-5
The Texas Instruments SN74LVC1G08DBVR is a single 2-input positive-AND gate operating from a 1.65 V to 5.5 V supply, packaged in the compact SOT-23-5 (DBV) surface-mount outline. It delivers the Boolean function Y = A AND B in positive logic with up to 32 mA output drive at 3.3 V. A logic gate is a fundamental building block of digital electronics that performs a Boolean operation on binary inputs to produce a single binary output. An AND gate outputs HIGH only when all inputs are HIGH. Single-gate logic (little logic) places one gate in a small package, allowing designers to glue logic into dense boards without dedicating a full multi-gate IC. The SN74LVC1G08 belongs to the LVC (Low-Voltage CMOS) logic family within the broader 74-series logic hierarchy. Key features include 5-V VCC operation, inputs that tolerate up to 5.5 V regardless of VCC, a typical propagation delay (tpd) of 3.3 ns at 3.3 V, and low power consumption with 10 uA maximum ICC. The Ioff feature supports partial-power-down mode operation, blocking backdrive current when VCC is removed - essential for multi-rail systems. Technically, the device uses CMOS technology for high noise immunity and low static power dissipation. TI provides a controlled baseline with one assembly/test site and one fabrication site for consistent quality. The SOT-23-5 footprint is universally supported by PCB design tools and assembly processes, and the family also offers the ultra-small 0.64 mm2 DPW package with 0.5 mm pitch for space-critical designs. Typical applications include signal gating, enable/disable logic, clock gating, and 3.3 V to 5 V interfacing in portable electronics, industrial control, and communication equipment. The wide supply range and robust drive make it ideal for mixed-voltage glue logic. Design tip: decouple VCC with a 0.1 uF ceramic capacitor close to the device, and tie unused inputs to a defined logic level - floating CMOS inputs can cause oscillation and excess current draw. Pricing references are as of 2026-08-29.
SN74LVC1G125DBVR - 3-State Bus Buffer SOT-23-5 | TI
The Texas Instruments SN74LVC1G125DBVR is a single non-inverting bus buffer gate with 3-state output, operating from a 1.65-V to 5.5-V supply in a compact SOT-23-5 (DBV) package. It provides one bit of buffering with an active-low output-enable (OE) pin that places the output in high impedance when high. A bus buffer gate is a digital logic component that isolates or buffers a signal line, providing a high-impedance output when disabled so multiple devices can share a common bus without contention. The SN74LVC1G125 belongs to the LVC (Low-Voltage CMOS) logic family, part of the broader CMOS logic IC category known for low power and high speed. Key features include 5-V VCC operation with inputs accepting voltages up to 5.5 V, a maximum propagation delay (tpd) specified at 3.3 V, and plus/minus 24-mA output drive at 3.3 V. The Ioff feature supports partial-power-down mode operation, preventing back-feeding current when the device is unpowered. Maximum ICC is only 10 uA, making it well suited to battery-powered designs. The device can drive capacitive loads up to 50 pF while meeting all datasheet specifications. The CMOS architecture delivers low static power consumption with fast switching, and the wide 1.65-V to 5.5-V operating range enables level buffering in mixed-voltage systems such as 1.8-V to 3.3-V or 3.3-V to 5-V interfaces. Typical applications include logic level shifting, bus isolation in multi-board systems, signal buffering for industrial control, consumer electronics, and communication interfaces such as I2C, SPI, and UART lines. When designing with this device, ensure the OE pin is properly driven to avoid bus contention, and add a series resistor for capacitive loads above 50 pF per TI datasheet guidance. The device operates from -40C to +125C.
SN74LVC1G14DBVR - Schmitt-Trigger Inverter SOT-23-5 | TI
The Texas Instruments SN74LVC1G14DBVR is a single inverter with Schmitt-trigger inputs operating from a 1.65 V to 5.5 V supply, performing the Boolean function Y = NOT A. Housed in a 5-pin SOT-23 (DBV) package, it provides clean output transitions even with slow or noisy input signals. A Schmitt-trigger inverter is a logic gate that uses positive feedback to create hysteresis between the positive-going threshold (VT+) and the negative-going threshold (VT-). This hysteresis (delta VT) prevents multiple output switching when the input hovers near the threshold, making the device tolerant of slow edges and noisy signals. Within the digital logic hierarchy, it belongs to the inverter family, a fundamental combinational-logic building block used for buffering, waveform shaping, and signal conditioning. Key features include a wide 1.65 V to 5.5 V supply range compatible with 1.8 V, 2.5 V, 3.3 V, and 5 V logic families, a high output drive of +/-32 mA at 3.3 V allowing direct drive of LEDs or similar loads, and low typical quiescent current of about 10 uA. Partial power-down (Ioff) protection keeps outputs high-impedance when VCC is off, enabling safe hot-insertion and mixed-voltage designs. ESD protection is rated 2 kV HBM per the TI datasheet. Fabricated in advanced CMOS (LVC) technology, the device achieves propagation delays as low as 3.7 ns at 3.3 V while maintaining fully specified Schmitt thresholds across the supply range. It operates from -40 C to +125 C, suiting industrial and harsh-environment systems. NanoStar packaging keeps the footprint minimal for high-density boards. Typical applications include debouncing mechanical switches, conditioning slow or noisy sensor signals, building relaxation oscillators, and interfacing between voltage domains. The wide supply range and strong drive make it a versatile glue-logic choice. Design tip: decouple VCC with a 0.1 uF ceramic capacitor placed close to the pin, and keep input traces short in high-speed sections to limit parasitic pickup.
SN74LVC1G17DBVR - Single Schmitt-Trigger Buffer 5.5V | TI
The SN74LVC1G17DBVR is a single Schmitt-trigger buffer from Texas Instruments, designed for 1.65-V to 5.5-V operation. It provides one non-inverting buffer with push-pull output in a SOT-23-5 package (DBV), performing the Boolean function Y = A with Schmitt-trigger inputs that provide hysteresis for noise immunity and slow input signal conditioning. A Schmitt-trigger buffer is a logic gate that uses positive feedback to provide hysteresis, meaning it has two different threshold voltages for rising and falling edges. In the hierarchy of logic devices, it belongs to the buffer family within standard logic ICs, used to isolate, drive, or condition signals. This makes it ideal for cleaning up noisy signals, squaring off slow edges, and converting analog signals to digital logic levels. Key features include a wide operating voltage range of 1.65 V to 5.5 V, high output drive capability of up to 32 mA at 3.3 V, and low static power dissipation. The device is fully specified for partial-power-down applications using Ioff, which prevents damaging current backflow when the device is powered down. It is also available in the ultra-small DPW package (0.64 mm2) with 0.5-mm pitch, as well as SC70 options. The SN74LVC1G17 uses CMOS technology, providing high-speed operation with low power consumption. The Schmitt-trigger inputs have typical hysteresis of 0.4 V at 3.3 V, ensuring clean switching even with slow or noisy input signals. The push-pull output makes it suitable for driving LEDs, relays, or other logic inputs. Typical applications include signal conditioning for sensors, switch debouncing, level shifting, interfacing between different logic families, oscillator circuits, and clock signal buffering. The wide voltage range makes it compatible with both 3.3-V and 5-V systems in industrial and consumer designs. When designing with this device, ensure that input signals do not exceed the supply voltage to avoid latch-up. The Schmitt-trigger inputs eliminate external hysteresis components. For high-speed applications, place the device close to the signal source to minimize trace inductance.
SN74LVC1T45DCKR - Single-Bit Level Translator | Texas Instruments
The SN74LVC1T45DCKR is a single-bit, dual-supply bus transceiver from Texas Instruments designed for asynchronous communication between data buses operating at different voltage levels. It features configurable voltage translation and 3-state outputs, supporting bidirectional level shifting with a data rate of up to 420 Mbps. The device operates from two separate power-supply rails: VCCA from 1.65 V to 5.5 V and VCCB from 1.65 V to 5.5 V, allowing seamless interfacing between low-voltage and high-voltage logic families. Housed in a compact 6-pin SC-70 (DCK) package, it is ideal for space-constrained applications. A voltage-level translator, also known as a level shifter, is a logic device that enables communication between integrated circuits operating at different supply voltages. In modern mixed-voltage systems, where a microcontroller at 1.8 V must interface with a sensor at 3.3 V or a memory at 5 V, level translators ensure signal integrity and prevent damage to low-voltage components. The SN74LVC1T45 belongs to the LVC family of low-voltage CMOS logic, which is characterized by high speed, low power consumption, and compatibility with a wide range of supply voltages. As a bus transceiver, it provides bidirectional data flow with direction control, making it a fundamental building block in digital system design. Key features of the SN74LVC1T45DCKR include ESD protection exceeding JESD 22 specifications (2000-V Human-Body Model per A114-A), support for 5-V VCC operation, and inputs that accept voltages up to 5.5 V. The device offers a typical propagation delay (tpd) of 3.3 ns at 3.3 V, low power consumption with a maximum ICC of 10 µA, and ±24-mA output drive capability at 3.3 V. The Ioff feature disables outputs during power-down, preventing backflow current and protecting the device in mixed-power-off scenarios. These specifications make it suitable for high-speed data buses and battery-powered portable devices. Technically, the SN74LVC1T45 uses a CMOS architecture with a direction pin (DIR) that controls the data flow between the A and B ports. When DIR is high, data flows from A to B; when low, data flows from B to A. The device also features an output-enable (OE) pin that places the outputs in a high-impedance state when asserted high, allowing multiple transceivers to share a common bus. The dual-supply design ensures that the output voltage levels match the respective supply rails, providing proper logic levels for each domain. The device is fully specified for operation from -40°C to +125°C, making it suitable for industrial and automotive environments. Typical applications include I2C and SPI bus level shifting, interfacing between microcontrollers and sensors, memory card interfaces, and general-purpose logic translation in mixed-voltage systems. Its high data rate and low propagation delay make it ideal for high-speed serial interfaces, while its small package and low power consumption suit portable and battery-operated equipment. The SN74LVC1T45DCKR is also used in automotive electronics, where reliable level translation is critical for communication between different voltage domains. When designing with this device, ensure that both VCCA and VCCB are powered and within their specified ranges. The DIR and OE pins should be driven to valid logic levels to avoid bus contention. Proper decoupling capacitors on both supply rails are recommended to maintain signal integrity and minimize noise.
SN74LVC240A - Octal Buffer/Driver 3-State 3.3V | Texas Instruments
The SN74LVC240A from Texas Instruments is an octal inverting buffer/line driver with 3-state outputs, organized as two independently enabled 4-bit banks operating from a 1.65 V to 3.6 V supply. It is designed for 3-state memory address drivers, clock drivers, and bus-oriented receiver/transmitter circuits. An octal buffer/line driver is a digital logic IC in the 74LVC family that provides signal buffering, inversion, and bus isolation. Within the logic-IC hierarchy, it sits under the 74xx logic family and Low-Voltage CMOS (LVC) technology. The 3-state outputs let multiple devices drive a shared bus without contention, a fundamental requirement in bus-oriented digital systems. Key features include 5.5-V tolerant inputs enabling mixed-mode signal operation on all ports, a typical propagation delay (tpd) of 3.3 ns at 3.3 V, and low VOLP/VOHV ground-bounce and undershoot figures for signal integrity in high-speed designs. According to the TI datasheet (SCAS293, Rev. K/L), the device can drive a load of up to 50 pF while still meeting all datasheet specifications. The device is built on CMOS technology, combining low static power consumption with high noise immunity and strong output drive. The dual-bank structure with separate active-low output-enable (OE) inputs supports half-duplex transceiver and word-wide bus gating topologies. Typical applications include memory address and clock driving, 3.3-V to 5-V mixed-voltage bus interfacing, industrial control I/O buffering, and telecom line-card logic. Packages include SOIC-20 (DW), TSSOP-20 (PW), and SSOP-20 (DB), supporting both hand and automated assembly. Design tip: keep total capacitive load at or below 50 pF for guaranteed timing; add 0.1 uF decoupling per supply pin and tie unused inputs to VCC or GND to prevent floating-node oscillation.
SN74LVC244APWR - Octal Buffer 3-State 24mA | TI | Bus Driver
The Texas Instruments SN74LVC244APWR is an octal buffer/line driver with 3-state outputs, designed for 1.65-V to 3.6-V VCC operation in a 20-pin TSSOP (PW) package rated from -40C to +125C. Organized as two 4-bit non-inverting buffers with separate active-low output-enable (OE) inputs, it provides asynchronous communication between data buses. A buffer/line driver is a digital logic IC that provides signal amplification, isolation, and fan-out between system blocks. Within the logic IC hierarchy, it belongs to the standard logic family alongside transceivers, latches, and flip-flops. The 3-state output feature lets the device disconnect from a shared bus, enabling multiple drivers to share a common data line without bus contention. Key features include a wide 1.65-V to 3.6-V supply range covering both 1.8-V and 3.3-V logic domains, inputs that tolerate voltages up to 5.5 V for mixed-voltage systems, and +/-24 mA output drive at 3.3 V. The Ioff partial-power-down circuitry prevents damaging backflow current when VCC is removed, and latch-up performance exceeds 100 mA per JESD 78 Class II. ESD protection exceeds 2000-V HBM (JESD 22 A114-A) and 1000-V CDM. Fabricated in advanced CMOS, the SN74LVC244A achieves a typical propagation delay of 4.3 ns at 3.3 V while maintaining low static power consumption, balancing speed and efficiency for bus-interface timing budgets. Typical applications include memory address buffering, clock distribution, and general-purpose I/O expansion for microcontrollers, FPGAs, and DSPs, plus level shifting between 1.8-V and 3.3-V domains in industrial control and telecommunications equipment. Design tip: decouple VCC with a 0.1-uF ceramic capacitor placed close to the pin, tie unused OE pins to a defined logic level, and keep traces short for high-speed signals.
SN74LVC2G17 - Dual Schmitt-Trigger Buffer | Texas Instruments
The SN74LVC2G17 is a dual Schmitt-trigger buffer from Texas Instruments, designed for 1.65-V to 5.5-V VCC operation. It contains two independent buffers that perform the Boolean function Y = A, with Schmitt-trigger inputs providing hysteresis for noise immunity. The device is available in multiple packages including SOT-23-6 (DBV), SON-6 (DRY), and NanoStar (YEP), making it suitable for space-constrained designs. A Schmitt-trigger buffer is a digital logic gate that uses positive feedback to provide different input threshold levels for rising (VT+) and falling (VT-) signals. This hysteresis eliminates false triggering caused by noise or slow input edges, making it ideal for interfacing with noisy environments, mechanical switches, and slow-rise-time signals. The SN74LVC2G17 belongs to the LVC logic family, which supports low-voltage operation down to 1.65 V while maintaining 5-V tolerant inputs. Key features include a wide supply voltage range of 1.65 V to 5.5 V, 5.5-V input tolerance, and a maximum propagation delay (tpd) of 3.3 ns at 3.3 V. The device offers ±24-mA output drive at 3.3 V, low power consumption with a maximum ICC of 10 µA, and typical output ground bounce (VOLP) and output VOH undershoot (VOHV) values specified at 25°C. It is fully specified for partial-power-down applications using Ioff, preventing backflow current when the device is powered down. The SN74LVC2G17 uses a CMOS process with a push-pull output stage, providing rail-to-rail output swing and high noise margin. The Schmitt-trigger inputs are implemented with a comparator-based circuit that ensures stable switching even with slow input transitions. The device is available in both standard and automotive (Q1) versions, with the Q1 variant qualified to AEC-Q100 for automotive applications. Typical applications include signal conditioning for sensors, switch debouncing, level shifting in mixed-voltage systems, and buffering of slow or noisy signals in industrial, consumer, and automotive electronics. The wide supply range and 5.5-V input tolerance make it a versatile choice for interfacing between 3.3-V and 5-V logic domains. When designing with this device, ensure that input signals do not exceed the recommended operating conditions, and consider the hysteresis characteristics for your specific noise environment. The Ioff feature allows for partial power-down, but proper power sequencing is recommended to avoid unintended current paths.
SN74LVC2G34DCKR - Dual Buffer 1.65-5.5V SC-70 | TI
The Texas Instruments SN74LVC2G34DCKR is a dual non-inverting buffer gate designed for 1.65-V to 5.5-V VCC operation, performing the Boolean function Y = A in positive logic. It comes in a compact 6-pin SC-70 (DCK) surface-mount package measuring 2.0 mm x 1.25 mm with a 0.65-mm pin pitch. A buffer gate is a digital logic circuit that amplifies or isolates a signal without changing its logic level. In the logic IC hierarchy, it falls under gates, part of the 74LVC CMOS logic family, ultimately classified as a standard logic integrated circuit. Buffers increase fan-out, drive longer PCB traces, and provide impedance isolation between a source and its load. Key features include support for 5-V VCC operation, inputs tolerant up to 5.5 V regardless of supply, and a typical propagation delay (tpd) of 3.3 ns at VCC = 3.3 V. Output drive is ±24 mA at 3.3 V, ensuring solid signal integrity. Maximum ICC is only 10 uA, making the part ideal for battery-powered designs. The device is fully specified for partial-power-down applications using Ioff circuitry, which disables outputs to prevent damaging backflow current when VCC is removed. The SN74LVC2G34 uses a CMOS process delivering high noise immunity and low static power dissipation. Typical VOLP (ground bounce) and VOHV (undershoot) performance keeps switching noise minimal in mixed-signal boards. NanoFree die-based package technology is also available in the family for ultra-miniature footprints. Typical applications include MCU GPIO buffering, clock distribution, level-compatible interfacing between 3.3-V and 5-V domains, and general logic isolation in consumer, industrial, and communication equipment. Pair it with TI translation parts such as TXS0102-Q1 or SN74LVC1T45 for full level shifting. Design tip: decouple VCC with a 0.1-uF ceramic capacitor close to the pin, and keep buffered traces short and impedance-controlled to preserve the 3.3-ns speed advantage.
SN74LVC8T245PWR - 8-Bit Dual-Supply Level Translator | TI
The Texas Instruments SN74LVC8T245PWR is an 8-bit dual-supply bus transceiver with configurable voltage translation and 3-state outputs, packaged in a 24-pin TSSOP (PW) with Tape and Reel delivery. Both the VCCA and VCCB ports operate over the full 1.65V to 5.5V supply range, enabling bidirectional level translation between any combination of 1.8V, 2.5V, 3.3V, and 5V logic domains. A bus transceiver is a digital logic IC that moves data bidirectionally between two buses, with direction (DIR) and output-enable (OE) controls providing the handshake. The SN74LVC8T245 belongs to the voltage-level translator / logic IC hierarchy and is a member of the TI Widebus+ family, solving the classic mixed-voltage problem in systems where MCUs, FPGAs, and peripherals run on different rails. Key features include the fully configurable dual-rail architecture, 3-state outputs for bus sharing, mixed-mode signal operation (5V I/O tolerance with reduced supply), and Ioff plus power-up 3-state support that blocks damaging backflow current during partial power-down and hot-insertion events. DIR and OE are referenced to VCCA, simplifying control-logic design. Technically, the device uses two independent supply-referenced port circuits. The typical data rate of 100 Mbps supports SPI, I2C, UART, and parallel bus translation, while low-impedance LVC output drivers preserve signal integrity with up to 15 pF load capacitance. Typical applications include level shifting for SD and SIM card interfaces, sensor and memory modules, 3.3V-to-5V industrial control I/O, and FPGA/CPLD I/O-bank adaptation to external peripherals. Design tip: decouple both VCCA and VCCB with 0.1uF ceramic capacitors placed close to the pins, tie OE to its proper logic level to avoid a 3-state bus at power-up, and set DIR according to data flow direction.
TXB0104RUTR - 4-Bit Bidirectional Level Shifter | TI
The Texas Instruments TXB0104RUTR is a 4-bit bidirectional voltage-level translator with automatic direction sensing and ±15-kV ESD protection, housed in a 12-pin UQFN (RUT) package measuring 1.7 mm x 2 mm. It translates signals between a low-voltage A port (1.2 V to 3.6 V) and a higher-voltage B port (1.65 V to 5.5 V), with the constraint VCCA ≤ VCCB, and supports data rates up to 100 Mbps. A voltage-level translator, also called a level shifter, is an integrated circuit that enables communication between digital devices operating at different supply voltages. In mixed-voltage systems a 3.3 V MCU may need to talk to a 5 V sensor or a 1.8 V memory; translators convert logic levels bidirectionally while protecting low-voltage silicon. The TXB0104 belongs to the auto-direction-sensing translator family, eliminating the need for a direction-control pin and simplifying PCB design and firmware. Key features include automatic direction sensing on each channel, ±15-kV ESD protection (Human Body Model) on all pins, tri-state outputs with an output enable (OE) pin for bus isolation, and an operating temperature range of -40°C to +85°C. Low quiescent current and the tiny UQFN footprint suit space-constrained portable designs. Architecturally, the TXB0104 uses a one-shot edge accelerator that speeds up rising and falling edges, enabling 100 Mbps operation at low static power. The A port tracks VCCA (1.2 V to 3.6 V) and the B port tracks VCCB (1.65 V to 5.5 V). The device supports partial power-down via the OE pin and is suitable for hot-insertion environments. Typical applications include SPI, UART, and push-pull GPIO level shifting between microcontrollers, sensors, SIM cards, SD card interfaces, and memory peripherals in mobile, industrial, and consumer products. Note the push-pull driver topology is not recommended for open-drain buses such as I2C or 1-Wire, as confirmed in TI E2E forum threads. Design tip: power VCCA before VCCB, place 0.1 µF bypass capacitors close to both supply pins, and use the OE pin for power sequencing. For open-drain or stronger-drive needs, consider TXS0104E or SN74LVC2T45.