74HC164D

Shift Registers Overview

The 74HC164D is an 8-bit serial-in, parallel-out shift register manufactured by Shenzhen Slkormicro Semicon Co., Ltd. It operates on a 2.0V to 6.0V supply voltage with a typical transmission delay of 12 ns at 5V and a maximum clock frequency of 78 MHz. The device features push-pull outputs capable of driving +/-5.2 mA and is compatible with LSTTL logic levels. It utilizes edge-triggered shifting on the rising clock pulse and includes an asynchronous active-low master reset.

Shift Registers Feature Summary

• Gated serial data inputs via logical AND operation of two input pins
• Asynchronous master reset for immediate output clearing
• High-speed CMOS technology with low power consumption
• ESD protection exceeding 2000 V (HBM) and 200 V (MM)

Shift Registers Applications

• Microcontroller I/O port expansion
• LED display driver circuits
• Seven-segment decimal display systems

Shift Registers Procurement Notes

Verify the manufacturer designation matches Shenzhen Slkormicro Semicon Co., Ltd. rather than standard industry sources like NXP or TI. Confirm the package type corresponds to SO14 as specified in the model suffix. Ensure the component meets the required operating temperature range and voltage specifications for the target application before integration.

Shift Registers Selection Notes

Select this component when expanding digital outputs from a microcontroller using limited GPIO pins. It is suitable for applications requiring serial-to-parallel conversion with moderate speed requirements up to 78 MHz. The wide supply voltage range supports both 3.3V and 5V logic systems, making it versatile for various embedded designs.

Shift Registers Part Context

This part belongs to the 74HC series of high-speed silicon-gate CMOS logic devices. It maintains pin compatibility with the legacy Low-Power Schottky TTL (LSTTL) family, facilitating direct replacement in older designs. The device integrates eight D-type flip-flops to store and shift data synchronously with the clock signal.

Shift Registers Replacement Considerations

Compatible substitutes include SN74HC164DR, MM74HC164, and NLV74HC164ADR2G.