MM74HC164M

Shift Registers Overview

The MM74HC164M is an 8-bit serial-in/parallel-out shift register manufactured by Fairchild Semiconductor. It utilizes advanced silicon-gate CMOS technology to provide high noise immunity and low power consumption. The device features gated serial inputs (A and B) that allow complete control over incoming data, where a low level at either input inhibits new data entry and resets the first flip-flop. Data is shifted into the register on the positive-going transition of the clock pulse. Each bit consists of a D-type flip-flop with push-pull outputs. The component operates within a supply voltage range of 2V to 6V and supports a typical operating frequency of 50MHz.

Shift Registers Feature Summary

• Gated serial inputs enable precise control over data entry through logical AND operation of two input terminals.
• Asynchronous clear function allows immediate resetting of all register outputs to a low state independent of the clock signal.
• CMOS construction ensures low quiescent current consumption while maintaining speeds comparable to low-power Schottky devices.

Shift Registers Applications

• Display driver circuits for consumer electronics such as LCDs and LEDs
• Serial-to-parallel data conversion in communication interfaces
• Status indication systems requiring sequential output activation

Shift Registers Procurement Notes

Verify the manufacturer marking matches Fairchild Semiconductor specifications. Confirm the package type is SOIC-14 and check for any suffix variations that may indicate tape-and-reel packaging versus bulk units. Ensure the device meets required temperature ratings for the intended application environment before finalizing procurement.

Shift Registers Selection Notes

Select this component when an 8-bit serial-to-parallel conversion is required with low power consumption. It serves as a direct replacement for older LS-TTL equivalents due to pin compatibility. Consider the 50MHz speed capability for moderate-frequency applications. Verify that the dual-input gating feature aligns with the system's data control logic requirements.

Shift Registers Part Context

This part belongs to the 74HC series of high-speed CMOS logic devices. It is functionally equivalent to other 74HC164 variants from different manufacturers but maintains specific electrical characteristics defined by Fairchild. The MM prefix typically denotes commercial grade performance within the company's product line.

Shift Registers Replacement Considerations

Compatible substitutes include MC74HC164M and ON Semiconductor equivalents. Verify pinout compatibility and electrical parameters such as propagation delay and output drive strength before substitution.