SN74BCT574 - Octal D-Type Flip-Flop with 3-State Outputs | TI
MPN: SN74BCT574 β Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $0.85 | $0.85 |
| 10 | $0.76 | $7.60 |
| 100 | $0.61 | $61.00 |
| 500 | $0.54 | $270.00 |
| 1,000 | $0.48 | $480.00 |
Drop-in alternatives for SN74BCT574 β same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Quick Comparison Tool β Select alternative parts for side-by-side comparison:
SN74BCT574N
β Drop-Inπ Reference alternative (not in catalog)
SN74BCT574DW
β Drop-Inπ Reference alternative (not in catalog)
SN74BCT574DB
β Drop-Inπ Reference alternative (not in catalog)
SN74BCT574NS
β Drop-Inπ Reference alternative (not in catalog)
SN74LS374N
β Drop-Inπ Reference alternative (not in catalog)
SN74HC574N
β Drop-Inπ Reference alternative (not in catalog)
SN74BCT574 Maximum Ratings & Electrical Characteristics
| Function | Octal D-Type Edge-Triggered Flip-Flop with 3-State Outputs |
| Supply Voltage Range | 4.5 V to 5.5 V |
| Output Type | 3-State |
| Number of Bits | 8 |
| Technology | BiCMOS |
| Package Options | DB (SSOP), DW (SOIC), N (PDIP), NS (SOP) |
| Operating Temperature Range | [DATA_NEEDED: operating temperature range] |
| Propagation Delay | [DATA_NEEDED: propagation delay] |
| Maximum Clock Frequency | [DATA_NEEDED: max clock frequency] |
| Output Drive Capability | High capacitive/low-impedance loads |
| Input Type | D-Type |
| Trigger Type | Edge-Triggered (rising edge) |
| Output Enable (OE) | Active-low |
| RoHS Status | Compliant |
| Mounting Type | Surface Mount or Through-Hole |
SN74BCT574 Pin Configuration
| Pin 1 | OE β Output enable (active low) |
| Pin 2 | D0 β Data input 0 |
| Pin 3 | D1 β Data input 1 |
| Pin 4 | D2 β Data input 2 |
| Pin 5 | D3 β Data input 3 |
| Pin 6 | D4 β Data input 4 |
| Pin 7 | D5 β Data input 5 |
| Pin 8 | D6 β Data input 6 |
| Pin 9 | D7 β Data input 7 |
| Pin 10 | GND β Ground |
| Pin 11 | CLK β Clock input (rising edge triggered) |
| Pin 12 | Q7 β Output 7 |
| Pin 13 | Q6 β Output 6 |
| Pin 14 | Q5 β Output 5 |
| Pin 15 | Q4 β Output 4 |
| Pin 16 | Q3 β Output 3 |
| Pin 17 | Q2 β Output 2 |
| Pin 18 | Q1 β Output 1 |
| Pin 19 | Q0 β Output 0 |
| Pin 20 | VCC β Power supply |
Safe Operating Area (SOA) & Thermal Characteristics
No official SOA curve available for this digital IC. Always operate within absolute maximum ratings specified in the datasheet. Ensure adequate cooling and derate as needed.
Typical Applications
SN74BCT574 is suitable for 6 applications: Buffer Registers, I/O Ports, Bidirectional Bus Drivers, Working Registers, Data Acquisition Systems, Industrial Control.
Buffer Registers
The SN74BCT574 is ideal for buffer registers in microprocessor systems, where it latches data from a data bus and drives it to output lines. Its 3-state outputs allow multiple registers to share a common bus without contention. The device's high drive capability ensures reliable signal integrity even with long traces or multiple loads. According to TI, it is specifically designed for driving highly capacitive or low-impedance loads, making it suitable for buffering address and data lines in memory interfaces.
Recommended
I/O Ports
In microcontroller systems, the SN74BCT574 can be used to expand I/O ports by latching data from the processor and driving external devices. The 3-state outputs allow the port to be shared with other peripherals, and the edge-triggered clock ensures synchronized data transfer. The device's ability to drive low-impedance loads makes it suitable for driving LEDs, relays, or other high-current loads. According to TI, it is particularly suitable for implementing I/O ports in bus-oriented systems.
Recommended
Bidirectional Bus Drivers
The SN74BCT574 can be used in bidirectional bus drivers, where it latches data from one bus and drives it onto another. The 3-state outputs allow the device to be disabled when not driving, preventing bus contention. The BiCMOS design provides high speed and low power, making it suitable for high-frequency bus systems. According to TI, the device is designed for driving highly capacitive or low-impedance loads, which is essential for bus lines with multiple loads.
Recommended
Working Registers
The SN74BCT574 can be used as working registers in CPUs or DSPs, where it stores intermediate data during processing. The edge-triggered design ensures data is captured at precise clock edges, and the 3-state outputs allow the register to be read by multiple units. The device's high speed and low power consumption make it suitable for high-performance computing systems. According to TI, it is particularly suitable for implementing working registers in microprocessor systems.
Recommended
Data Acquisition Systems
In data acquisition systems, the SN74BCT574 can be used to latch digital data from ADCs or sensors and transfer it to a processor. The 3-state outputs allow multiple data sources to share a common bus, and the edge-triggered clock ensures synchronized sampling. The device's high drive capability ensures reliable data transfer over long distances. According to TI, it is suitable for driving highly capacitive loads, which is common in data acquisition front-ends.
Recommended
Industrial Control
The SN74BCT574 is used in industrial control systems for latching and buffering control signals. Its 3-state outputs allow multiple controllers to share a common bus, and the wide operating voltage range of 4.5 V to 5.5 V makes it compatible with standard industrial logic levels. The device's robust design ensures reliable operation in harsh environments. According to TI, it is suitable for driving low-impedance loads, which is common in industrial actuators and relays.
Recommended
Recommended Products Summary
Engineering reference data for SN74BCT574 β comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | SN74BCT574N | SN74BCT574DW | SN74LS374N | SN74HC574N |
|---|---|---|---|---|---|
| Package | Multiple (DB, DW, N, NS) | PDIP (N) | SOIC (DW) | PDIP (N) | PDIP (N) |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
| Technology | BiCMOS | BiCMOS | BiCMOS | Bipolar | CMOS |
| Supply Voltage Range | 4.5 V to 5.5 V | 4.5 V to 5.5 V | 4.5 V to 5.5 V | 4.75 V to 5.25 V | 2 V to 6 V |
| Output Drive Capability | High capacitive/low-impedance | High capacitive/low-impedance | High capacitive/low-impedance | Standard | Standard |
| Propagation Delay | [DATA_NEEDED] | [DATA_NEEDED] | [DATA_NEEDED] | [DATA_NEEDED] | [DATA_NEEDED] |
| Maximum Clock Frequency | [DATA_NEEDED] | [DATA_NEEDED] | [DATA_NEEDED] | [DATA_NEEDED] | [DATA_NEEDED] |
| RoHS Status | Compliant | Compliant | Compliant | Compliant | Compliant |
Key Differentiators
- BiCMOS technology reduces power consumption (vs SN74LS374N)
- Wider operating voltage range (vs SN74LS374N)
- Higher output drive capability (vs SN74HC574N)
Design Notes
The SN74BCT574 operates from 4.5 V to 5.5 V. Ensure a stable 5V supply with adequate decoupling. Place a 0.1uF ceramic capacitor close to the VCC and GND pins to filter high-frequency noise. For higher current applications, add a 10uF tantalum capacitor in parallel. According to TI, proper decoupling is essential to prevent logic errors due to power supply noise.
For high-speed operation, keep traces short and avoid sharp bends. Use a ground plane to minimize inductance and noise. Place the SN74BCT574 close to the bus connectors to reduce signal degradation. According to TI, the device is designed to drive capacitive loads, but excessive trace capacitance can still cause ringing. Use series termination resistors if needed.
Ensure the OE pin is properly controlled to avoid bus contention. Tie OE to ground to enable outputs, or to VCC to disable them. Do not leave OE floating. Also, ensure the clock signal is clean and free of glitches to avoid metastability. According to TI, the clock input should be driven with a fast-rising signal to ensure reliable edge triggering.
Compliance Information
RoHS compliant per TI product page. Not AEC-Q100 qualified. Lead-free per TI's environmental data.
