MC74HC164ADR2

Shift Registers Overview

The MC74HC164ADR2 is an 8-bit serial-input to parallel-output shift register manufactured by onsemi. It operates within a supply voltage range of 2.0 V to 6.0 V and features push-pull outputs capable of driving 10 LSTTL loads. The device utilizes high-performance silicon-gate CMOS technology, ensuring low input current of 1 μA and high noise immunity. It includes two gated serial data inputs (A and B) for data enable control and an active-low asynchronous reset. The component is housed in a 14-SOIC package and complies with JEDEC standard requirements.

Shift Registers Feature Summary

• Provides serial-to-parallel data conversion using an 8-bit shift register architecture
• Features dual gated serial inputs allowing one input to function as a data enable
• Includes an active-low asynchronous reset that overrides clock and data inputs
• Outputs directly interface with CMOS, NMOS, and TTL logic families

Shift Registers Applications

• LED display driver circuits requiring serial data expansion
• Temperature control systems utilizing shift registers for output expansion
• General-purpose I/O expansion for microcontrollers such as STM32 or Raspberry Pi
• Digital logic interfaces requiring serial-to-parallel conversion

Shift Registers Procurement Notes

Verify the specific suffix 'ADR2' against official datasheets to confirm package type and tape-and-reel specifications. Ensure compatibility with existing PCB footprints for the 14-SOIC form factor. Confirm RoHS compliance status if required for specific manufacturing standards. Cross-reference pinouts with legacy LS164 designs if migrating from older technologies.

Shift Registers Selection Notes

Select this component when an 8-bit serial-to-parallel converter is needed with CMOS-compatible inputs and outputs. It serves as a direct pinout-compatible replacement for the 74LS164 while offering lower power consumption. Consider the 2V to 6V operating range for suitability in various digital logic environments. Verify that the asynchronous reset functionality meets system initialization requirements.

Shift Registers Part Context

This part belongs to the 74HC series of high-speed CMOS logic devices produced by onsemi. It shares functional similarities with other 8-bit shift registers like the 74HC595 but differs in having serial inputs rather than serial-in/serial-out capabilities. The device is designed for general-purpose digital applications where space-efficient data expansion is required without complex interfacing protocols.

Shift Registers Replacement Considerations

MC74HC164ADTR2G

Shift Registers FAQ

How does the MC74HC164ADR2 handle data entry?

Data is entered on each rising edge of the clock signal through two serial data inputs, A and B. These inputs are ANDed together, allowing one to be used as a data enable.

What is the function of the asynchronous reset input?

The active-low asynchronous reset input clears all eight flip-flops to a low state immediately, overriding both the clock and serial data inputs.