MM74HC164MX

Shift Registers Overview

The MM74HC164MX is an 8-bit serial-in/parallel-out shift register from the onsemi 74HC series. It utilizes advanced silicon-gate CMOS technology for high noise immunity and low power consumption. The device features gated serial inputs (A and B) that permit complete control over incoming data entry, requiring both to be high or tied together for operation. Data shifts on the positive clock transition, with an asynchronous master reset input available to clear all outputs. It operates within a supply voltage range of 2 V to 6 V and supports surface-mount installation in SOIC-14 packages.

Shift Registers Feature Summary

• Gated serial data inputs allow precise control over data entry via logical AND of two input pins.
• Asynchronous master reset function clears all register outputs to low level regardless of clock state.
• High noise immunity and low power consumption characteristic of standard CMOS integrated circuits.
• Positive-going clock pulse transition triggers data shifting from serial input to parallel outputs.

Shift Registers Applications

• Serial-to-parallel data conversion for microcontroller interface expansion
• Driving multi-digit seven-segment displays using limited I/O ports
• LED matrix scanning and indicator control systems

Shift Registers Procurement Notes

Verify the specific suffix 'MX' against the manufacturer's official datasheet to confirm package type and tape/reel specifications. Ensure compatibility with existing PCB footprints for SOIC-14 components. Check for RoHS compliance status and lead-free manufacturing requirements relevant to your assembly process. Confirm availability through authorized distributors as obsolescence may affect long-term sourcing.

Shift Registers Selection Notes

Select this component when an 8-bit serial-to-parallel converter is required with minimal pin count. The HC logic family ensures compatibility with standard TTL loads while offering lower power dissipation than older LS-TTL alternatives. Verify that the operating voltage range of 2V to 6V aligns with the system's power supply rails. Consider the propagation delay characteristics if high-speed data shifting is critical to the application timing.

Shift Registers Part Context

This part belongs to the widely adopted 74HC logic family, known for broad industry acceptance and pin compatibility with legacy designs. The MM74HC164 variant specifically addresses applications needing serial data expansion into parallel formats. It serves as a fundamental building block in digital electronics for managing data flow between serial communication lines and parallel output devices.

Shift Registers Replacement Considerations

Cross-reference with other manufacturers' 74HC164 equivalents such as SN74HC164 or CD74HC164 for functional parity. Verify pinout compatibility and electrical specifications before substitution. Ensure the replacement maintains the same SOIC-14 package dimensions for direct board replacement without redesign.