MC74HC164AFR1

Shift Registers Overview

The MC74HC164AFR1 is an 8-bit serial-input to parallel-output shift register manufactured by onsemi. It utilizes high-performance silicon-gate CMOS technology and operates within a DC supply voltage range of 2.0 V to 6.0 V. The device features two serial data inputs, A1 and A2, allowing one input to function as a data enable. Data is shifted into the register on each rising edge of the clock signal. An active-low asynchronous reset input overrides both the clock and serial data inputs to clear all outputs. The component provides push-pull outputs compatible with standard CMOS, NMOS, and TTL logic families.

Shift Registers Feature Summary

• Provides eight parallel outputs derived from serial data input via rising-edge clock triggering
• Includes dual serial inputs enabling flexible configuration for data enable functionality
• Features active-low asynchronous reset that immediately clears all internal flip-flops
• Ensures high noise immunity and low input current characteristics typical of CMOS devices

Shift Registers Applications

• Serial-to-parallel data conversion in digital communication systems
• Driving LED displays or indicator arrays requiring sequential data loading
• Expanding I/O capabilities in microcontroller-based embedded designs
• General-purpose shift register applications in industrial control circuits

Shift Registers Procurement Notes

Verify the specific FR1 suffix against official onsemi documentation to confirm package type and tape-and-reel specifications. Ensure compliance with automotive qualification requirements if the -Q suffix variant is intended for such environments. Confirm RoHS and halogen-free status through current material composition reports. Validate pinout compatibility with existing LS/ALS164 footprints during integration planning.

Shift Registers Selection Notes

Select this component when an 8-bit shift register with parallel output is required for HC-speed logic applications. Consider the operating voltage range of 2.0 V to 6.0 V for system power constraints. Evaluate the need for asynchronous reset functionality and dual serial inputs for data gating. Verify interface compatibility with driving sources, noting that pull-up resistors may be necessary for LSTTL output interfacing.

Shift Registers Part Context

This part belongs to the MC74HC164A family of 8-bit shift registers. It shares identical pinouts with LS/ALS164 equivalents but offers improved performance through silicon-gate CMOS technology. The device is designed for general-purpose digital logic applications requiring reliable serial data shifting and parallel output distribution within standard logic voltage ranges.

Shift Registers Replacement Considerations

The MC74HC164A serves as the base functional equivalent. Check for -Q suffix variants if automotive PPAP capability is required. Verify package availability (SOIC-14 or TSSOP-14) matches board layout constraints. Cross-reference with other manufacturers' 74HC164 parts ensuring pinout and electrical characteristics align with design specifications.