SN74HC164PWT

Shift Registers Overview

The SN74HC164PWT is an 8-bit parallel-out serial shift register manufactured by Texas Instruments. It operates within a supply voltage range of 2 V to 6 V and features AND-gated serial inputs (A and B) alongside an asynchronous clear (CLR) input. The device utilizes a TSSOP-14 package with dimensions of 5.00 mm × 4.40 mm. It supports clock frequencies up to 36 MHz at 6 V and provides ±4-mA output drive capability at 5 V.

Shift Registers Feature Summary

• Features AND-gated serial inputs for complete control over incoming data entry
• Includes an asynchronous clear function that resets all registers immediately
• Provides push-pull outputs capable of driving multiple LSTTL loads

Shift Registers Applications

• Programmable Logic Controllers
• Appliances
• Video Display Systems
• Output Expander

Shift Registers Procurement Notes

Verify the specific ordering suffix 'W' corresponds to the TSSOP package variant when sourcing. Confirm RoHS compliance status and lead time directly with authorized distributors or Texas Instruments, as availability varies by region and production lot. Ensure the component meets MIL-PRF-38535 requirements if applicable to your design specifications.

Shift Registers Selection Notes

Select this component for designs requiring serial-to-parallel conversion with low power consumption. The wide operating voltage range allows compatibility with various logic families. Consider the TSSOP package for space-constrained surface-mount applications. Verify timing requirements against your system clock speed to ensure reliable data shifting operations.

Shift Registers Part Context

This part belongs to the SNx4HC164 family of high-speed CMOS logic devices. It shares functional characteristics with other variants in the series, differing primarily in packaging options such as SOIC, PDIP, and CDIP. The HC technology ensures low static power consumption while maintaining fast switching speeds suitable for general-purpose digital logic applications.

Shift Registers Replacement Considerations

SN74HC164DR

Shift Registers FAQ

How do the gated serial inputs function?

Data enters the shift register only when both serial inputs A and B are high. A low signal on either input inhibits new data entry and resets the first flip-flop to low on the next clock pulse.

What triggers the data shift operation?

Data is clocked into the register on the low-to-high transition of the CLK pin. Data can be changed while CLK is high or low, provided setup time requirements are met.