MC74HC164AFR2

Shift Registers Overview

The MC74HC164AFR2 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 supply voltage range of 2.0 V to 6.0 V. The device features two serial data inputs (A1, A2) that allow one input to function as a data enable. Data is shifted on the rising edge of the clock signal. It includes an active-low asynchronous reset input that overrides clock and serial data inputs. The outputs are compatible with standard CMOS, NMOS, and TTL loads.

Shift Registers Feature Summary

• Provides serial-to-parallel conversion using an 8-stage shift register architecture
• Features dual serial data inputs allowing flexible data enable functionality
• Includes active-low asynchronous reset for immediate output clearing
• Compatible with standard CMOS, NMOS, and TTL logic families

Shift Registers Applications

• Data acquisition systems requiring serial-to-parallel conversion
• LED display drivers and indicator control circuits
• General-purpose digital logic shifting applications
• Interface circuits between microcontrollers and peripheral devices

Shift Registers Procurement Notes

Verify the specific suffix 'FR2' against official onsemi documentation, as standard listings typically utilize 'D' (SOIC) or 'DT' (TSSOP) package codes. Confirm RoHS compliance status and ensure the ordering code matches the required package type and tape/reel specifications provided in the manufacturer's current datasheet.

Shift Registers Selection Notes

Select this component when an 8-bit shift register with push-pull outputs is required for low-power CMOS applications. Ensure the operating voltage aligns with the 2.0 V to 6.0 V range. Consider the asynchronous reset feature if immediate clearing of output states is necessary without waiting for clock cycles. Verify interface compatibility with driving logic levels.

Shift Registers Part Context

This part belongs to the 74HC series of high-speed CMOS logic devices. It is pin-compatible with the LS164 variant but offers lower power consumption and higher noise immunity typical of CMOS technology. The device is designed for general-purpose digital applications requiring reliable data shifting capabilities within standard industrial temperature ranges.

Shift Registers Replacement Considerations

Direct replacements include MC74HC164ADTR2G (TSSOP-14) and MC74HC164ADR2G (SOIC-14). Cross-vendor equivalents such as STMicroelectronics M74HC164B1R or NXP variants may be considered if pinout and electrical characteristics match the original specification.