74AHC595PW,112

Shift Registers Overview

The Nexperia 74AHC595PW,112 is an 8-bit serial-in/serial or parallel-out shift register with output latches. It features a storage register and 3-state outputs. Both the shift and storage registers have separate clocks. The device includes a serial input (DS) and a serial output (Q7S) for cascading, plus an asynchronous reset MR input. Data shifts on LOW-to-HIGH transitions of SHCP and transfers to the storage register on STCP transitions. Outputs appear when OE is LOW; HIGH OE causes high-impedance OFF-state. Supply voltage ranges from 2.0 V to 5.5 V. Operating temperature spans -40 °C to +125 °C.

Shift Registers Feature Summary

• Wide supply voltage range from 2.0 V to 5.5 V
• All inputs have Schmitt-trigger action
• Overvoltage tolerant inputs to 5.5 V
• High noise immunity

Shift Registers Applications

• Serial-to-parallel data conversion
• Remote control holding register

Shift Registers Procurement Notes

Verify the ordering suffix

Shift Registers Selection Notes

Select this component for designs requiring 8-bit serial-to-parallel conversion with independent clocking for shift and storage registers. The TSSOP16 package suits space-constrained PCB layouts. Ensure supply voltage stays within 2.0 V to 5.5 V. Verify that input levels match CMOS requirements for the AHC variant. Consider the overvoltage tolerance if interfacing with higher voltage signals without level shifting.

Shift Registers Part Context

This part belongs to the 74AHC logic family, known for high-speed CMOS operation. It is functionally compatible with other 74AHC595 variants but differs in packaging. The PW suffix indicates the TSSOP16 package. It serves as a standard building block for digital systems needing data expansion or display driving capabilities.

Shift Registers Replacement Considerations

Check for direct pin-compatible alternatives like the 74AHCT595PW if TTL input levels are required instead of CMOS. Verify package dimensions against existing footprints. Confirm electrical characteristics match system requirements before substitution.

Shift Registers FAQ

What is the function of the OE input?

The OE (Output Enable) input controls the state of the parallel outputs. When OE is LOW, data from the storage register appears at the outputs. When OE is HIGH, the outputs assume a high-impedance OFF-state.

How does the asynchronous reset work?

The MR (Master Reset) input is active LOW. Applying a LOW signal to MR resets the shift register immediately, regardless of the clock states.