74AHC594PW,118

Shift Registers Overview

The Nexperia 74AHC594PW,118 is an 8-bit serial-in, parallel-out shift register with an output storage register. It operates within a supply voltage range of 2.0 V to 5.5 V and features Schmitt-trigger inputs for high noise immunity. The device utilizes separate clocks (SHCP and STCP) and direct overriding clears (SHR and STR) for both the shift and storage registers. It is housed in a 16-TSSOP package (SOT403-1) and supports operation from -40 °C to +125 °C.

Shift Registers Feature Summary

• Provides independent clocking and clearing functions for both the shift and storage registers.
• Includes Schmitt-trigger action on all inputs to tolerate slower input rise and fall times.
• Features overvoltage tolerant inputs up to 5.5 V for compatibility with various logic families.

Shift Registers Applications

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

Shift Registers Procurement Notes

Verify the specific ordering suffix

Shift Registers Selection Notes

Select this component when a non-inverting 8-bit shift register with a dedicated storage latch is required. The TSSOP16 package suits space-constrained designs. Ensure the design accommodates the separate SHCP and STCP signals if independent shifting and latching are needed, or connect them together noting the one-pulse offset.

Shift Registers Part Context

This part belongs to the 74AHC family of high-speed Si-gate CMOS devices. It is pin-compatible with Low-Power Schottky TTL (LSTTL). The PW suffix indicates the TSSOP16 plastic thin shrink small outline package variant, distinct from the SO16 or QFN options available in the broader 74AHC594 product line.

Shift Registers Replacement Considerations

Cross-reference with other manufacturers' 74AHC594 equivalents. Verify that any substitute maintains the same TSSOP16 footprint and electrical characteristics, particularly the 2.0 V to 5.5 V operating range and Schmitt-trigger input specifications.

Shift Registers FAQ

What is the function of the Q7S pin?

Q7S is a serial output provided specifically for cascading purposes, allowing multiple shift registers to be connected in series.

How do the SHR and STR pins operate?

SHR and STR are direct overriding clear inputs for the shift and storage registers, respectively. They are active LOW and independently reset their associated registers.