CD74HC374 - Octal D-Type Flip-Flop, 3-State | Texas Instruments
MPN: CD74HC374 β Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $0.45 | $0.45 |
| 10 | $0.38 | $3.80 |
| 100 | $0.29 | $29.00 |
| 500 | $0.24 | $120.00 |
| 1,000 | $0.19 | $190.00 |
Drop-in alternatives for CD74HC374 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:
SN74HC374
β Drop-Inπ Reference alternative (not in catalog)
CD74HCT374
β Drop-Inπ Reference alternative (not in catalog)
74HC374
β Drop-Inπ Reference alternative (not in catalog)
74HC374
β Drop-Inπ Reference alternative (not in catalog)
CD74HC574
β Drop-Inπ Reference alternative (not in catalog)
CD74HC374 Maximum Ratings & Electrical Characteristics
| Function | Octal D-Type Flip-Flop, 3-State |
| Technology Family | HC |
| Supply Voltage (VCC) | 2 V to 6 V |
| Number of Channels | 8 |
| Output Type | 3-State |
| Trigger Type | Positive-Edge |
| Propagation Delay (tpd) | 15 ns (typical at 5V) |
| Maximum Clock Frequency | 30 MHz |
| Output Drive Capability | 15 LSTTL loads |
| Input Type | Standard CMOS |
| Operating Temperature Range | -55C to +125C |
| Package Options | SOIC-20 (DW), PDIP-20 (N), TSSOP-20 (PW) |
| Mounting Type | Surface Mount or Through-Hole |
| RoHS Status | Compliant |
| Number of Bits | 8 |
CD74HC374 Pin Configuration
| Pin 1 | OE β Output Enable (active low) |
| Pin 2 | 1Q β Flip-flop 1 output |
| Pin 3 | 1D β Flip-flop 1 data input |
| Pin 4 | 2D β Flip-flop 2 data input |
| Pin 5 | 2Q β Flip-flop 2 output |
| Pin 6 | 3Q β Flip-flop 3 output |
| Pin 7 | 3D β Flip-flop 3 data input |
| Pin 8 | 4D β Flip-flop 4 data input |
| Pin 9 | 4Q β Flip-flop 4 output |
| Pin 10 | GND β Ground |
| Pin 11 | CP β Clock input (positive-edge triggered) |
| Pin 12 | 5Q β Flip-flop 5 output |
| Pin 13 | 5D β Flip-flop 5 data input |
| Pin 14 | 6D β Flip-flop 6 data input |
| Pin 15 | 6Q β Flip-flop 6 output |
| Pin 16 | 7Q β Flip-flop 7 output |
| Pin 17 | 7D β Flip-flop 7 data input |
| Pin 18 | 8D β Flip-flop 8 data input |
| Pin 19 | 8Q β Flip-flop 8 output |
| Pin 20 | VCC β Positive supply voltage |
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
CD74HC374 is suitable for 6 applications: Microprocessor Systems, Data Storage Registers, Address Decoding, Bus Interfacing, Communication Interfaces, Industrial Control Systems.
Microprocessor Systems
The CD74HC374 is used in microprocessor systems for data latching and bus interfacing. Its 3-state outputs allow multiple devices to share a common data bus without contention. The positive-edge triggering ensures synchronous data capture, and the wide 2V to 6V supply range supports both 3.3V and 5V microcontrollers. With a propagation delay of 15 ns and clock frequency up to 30 MHz, it meets the timing requirements of most embedded processors. The high drive capability of 15 LSTTL loads enables direct connection to multiple peripherals without additional buffering.
Recommended
Data Storage Registers
The CD74HC374 serves as an 8-bit data storage register in digital systems. Its edge-triggered flip-flops capture data on the rising clock edge, providing stable storage for parallel data. The 3-state outputs allow the register to be isolated from the bus when not selected, preventing data corruption. With a maximum clock frequency of 30 MHz, it can handle high-speed data streams. The device's low power consumption makes it suitable for battery-powered applications. The wide operating voltage range ensures compatibility with various logic levels.
Recommended
Address Decoding
In address decoding circuits, the CD74HC374 can latch address lines and control signals. Its 3-state outputs enable multiple address decoders to share a common bus, reducing the number of required ICs. The positive-edge triggering ensures that address data is captured at the correct moment. The device's high drive capability allows it to drive multiple memory chips directly. The 2V to 6V supply range makes it compatible with both legacy 5V systems and modern 3.3V designs. The fast propagation delay minimizes address setup time.
Recommended
Bus Interfacing
The CD74HC374 is ideal for bus interfacing in digital systems, providing a buffer between a processor and peripheral devices. Its 3-state outputs allow the device to be disconnected from the bus when not in use, preventing bus contention. The positive-edge triggering ensures synchronous data transfer. With a propagation delay of 15 ns, it supports high-speed bus operations. The device can drive up to 15 LSTTL loads, making it suitable for driving multiple peripherals. The wide supply voltage range allows use in mixed-voltage systems.
Recommended
Communication Interfaces
The CD74HC374 is used in communication interfaces for data buffering and synchronization. Its 3-state outputs enable multiple devices to share a communication bus, such as UART or SPI. The positive-edge triggering ensures data is captured at the correct clock edge. The device's high-speed operation (30 MHz) supports fast data rates. The low power consumption is beneficial for portable communication devices. The wide operating voltage range ensures compatibility with various logic families.
Recommended
Industrial Control Systems
In industrial control systems, the CD74HC374 is used for latching sensor data and control signals. Its 3-state outputs allow multiple sensors to share a common data bus. The positive-edge triggering ensures reliable data capture in noisy environments. The device's wide operating temperature range (-55C to +125C) makes it suitable for harsh industrial conditions. The high drive capability allows direct connection to relays and actuators. The 2V to 6V supply range supports various industrial logic levels.
Recommended
Recommended Products Summary
Engineering reference data for CD74HC374 β comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | SN74HC374 | CD74HCT374 | 74HC374 (NXP) |
|---|---|---|---|---|
| Package | SOIC-20, PDIP-20, TSSOP-20 | SOIC-20, PDIP-20, TSSOP-20 | SOIC-20, PDIP-20, TSSOP-20 | SOIC-20, TSSOP-20 |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | NXP Semiconductors |
| Supply Voltage | 2V to 6V | 2V to 6V | 4.5V to 5.5V | 2V to 6V |
| Propagation Delay | 15 ns (typ at 5V) | 15 ns (typ at 5V) | 15 ns (typ at 5V) | 15 ns (typ at 5V) |
| Max Clock Frequency | 30 MHz | 30 MHz | 30 MHz | 30 MHz |
| Output Drive | 15 LSTTL loads | 15 LSTTL loads | 15 LSTTL loads | 15 LSTTL loads |
| Input Compatibility | CMOS | CMOS | TTL | CMOS |
| Operating Temperature | -55C to +125C | -55C to +125C | -55C to +125C | -40C to +125C |
Key Differentiators
- Wide supply voltage range of 2V to 6V (vs CD74HCT374)
- High output drive capability of 15 LSTTL loads (vs 74HC374 (NXP))
- Multiple package options including PDIP (vs 74HC374 (NXP))
Design Notes
The CD74HC374 operates from 2V to 6V. Ensure the supply voltage is within this range and stable. Place a 0.1uF decoupling capacitor close to the VCC pin and a 10uF bulk capacitor on the power rail to minimize noise and voltage dips during switching.
For high-speed operation, keep the clock (CP) trace short and direct to minimize propagation delay and signal integrity issues. Use a ground plane to reduce noise. The OE pin should be tied to a defined logic level when not used to prevent floating inputs.
Avoid bus contention by ensuring only one device drives the bus at a time. The OE pin is active-low; when OE is high, outputs are high-impedance. Ensure the clock signal is clean and free of glitches to prevent false triggering. Unused inputs should be tied to VCC or GND.
Compliance Information
RoHS compliant per TI product page. Not AEC-Q100 qualified; use SN74HC374-Q1 for automotive.
