74AHCT574PW,118

Overview

The 74AHCT574PW,118 is an octal D-type flip-flop with 3-state outputs manufactured by Nexperia. It operates within a supply voltage range of 4.5 V to 5.5 V and features positive-edge triggering. The device utilizes a 20-pin TSSOP surface-mount package. Key electrical specifications include a maximum propagation delay of 16 ns at 5 V with 50 pF load, output drive currents of 8 mA for both high and low states, and a static current consumption of 2 µA. It supports industrial operating temperatures from -40 °C to +125 °C.

Feature Summary

• Octal D-type flip-flop architecture providing eight independent storage elements in a single integrated circuit.
• Positive-edge clock triggering mechanism ensures data capture occurs specifically on the rising edge of the clock signal.
• Three-state output configuration allows direct connection to bus systems without external pull-up or pull-down resistors.
• Compliance with JEDEC standards ensures compatibility with standard CMOS logic families and robust latch-up performance.

Applications

• Parallel-to-serial data conversion circuits utilizing shift register configurations.
• General-purpose memory storage modules requiring parallel data latching.
• Bus interface adapters for managing data flow between microprocessors and peripheral devices.
• Timing control logic for synchronizing data signals across digital system components.

Procurement Notes

Verify the complete part number including the suffix ,118 to ensure correct tape-and-reel packaging specifications. Confirm that the design environment supports the 4.5 V to 5.5 V operating voltage range required for AHCT logic family compatibility. Check for RoHS compliance status and lead-free material declarations prior to final procurement approval.

Selection Notes

Select this component when an octal storage solution with three-state outputs is required for 5 V logic systems. The AHCT series offers speed and power characteristics compatible with standard 74HC logic while maintaining TTL input thresholds. Ensure the TSSOP20 package fits the available PCB footprint and thermal management requirements for the target application environment.

Part Context

This component belongs to the Nexperia 74AHCT series, which combines the high-speed performance of HC logic with TTL-compatible input levels. The 74AHCT574 variant specifically provides octal D-type flip-flops. The PW suffix indicates the TSSOP20 plastic weak small package, suitable for space-constrained surface-mount designs requiring reliable long-term operation.

Replacement Considerations

Direct pin-compatible substitutes include other manufacturers' 74AHCT574 variants such as SN74AHCT574DW from Texas Instruments or MC74AHCT574ADWR2G from ON Semiconductor. Verify that alternative sources maintain identical 3-state output functionality and TSSOP20 package dimensions before implementation.

FAQ

What is the specific trigger condition for data input?

Data is captured at the D inputs on the positive-going edge (rising edge) of the clock pulse.

How does the device handle powered-down inputs?

The datasheet specifies I_OFF circuitry that disables outputs to prevent damaging backflow currents when the device is partially powered down.