MM74HCT164M

Shift Registers Overview

The MM74HCT164M is an 8-bit serial-in/parallel-out shift register from the HCT logic series, manufactured by onsemi. It utilizes advanced silicon-gate CMOS technology and features a 14-pin SOIC package. The device operates within a supply voltage range of 4.5V to 5.5V and supports a typical operating frequency of 50MHz with a typical propagation delay of 19ns from clock to output. It exhibits low quiescent supply current of up to 80µA and can drive ten LS-TTL loads. The component includes gated serial inputs for data control and an asynchronous clear function.

Shift Registers Feature Summary

• Converts serial input data into parallel outputs using eight D-type flip-flops triggered by positive clock transitions.
• Features dual gated serial inputs (A and B) that allow complete control over incoming data entry and inhibit new data when low.
• Includes an asynchronous master reset input that clears the register and forces all outputs to a low level independently of the clock signal.

Shift Registers Applications

• Serial-to-parallel data conversion in digital communication interfaces
• Driving LED displays or indicator arrays requiring sequential data loading
• Expanding parallel I/O ports in microcontroller-based systems

Shift Registers Procurement Notes

Verify the specific suffix 'M' corresponds to the SOIC-14 package configuration required for your PCB layout. Confirm the HCT logic family compatibility with your system's 5V TTL-level signals. Ensure the operating temperature range meets your environmental specifications. Cross-reference the manufacturer part number MM74HCT164M with official onsemi documentation to validate pinout and electrical characteristics before finalizing procurement.

Shift Registers Selection Notes

Select this component when interfacing between serial data sources and parallel load requirements within a 5V logic environment. The HCT series ensures direct compatibility with standard TTL circuits while offering CMOS power efficiency. Consider the 19ns propagation delay and 50MHz speed for timing-critical applications. Verify that the 14-pin SOIC footprint aligns with your assembly capabilities and space constraints.

Shift Registers Part Context

This component belongs to the 74HCT164 family of high-speed silicon-gate CMOS devices. It serves as a fundamental building block for sequential logic circuits, providing reliable data shifting capabilities. The device is designed to replace older low-power Schottky TTL equivalents, offering improved noise immunity and lower power consumption while maintaining pin compatibility with legacy designs.

Shift Registers Replacement Considerations

Compatible substitutes include MC74HC164ADTR2G and MM74HC164MX. Verify that alternative parts match the HCT logic family for proper voltage level compatibility with TTL inputs. Ensure the replacement maintains the same 8-bit serial-in/parallel-out functionality and 14-pin package dimensions.