SN74HC164PWR

Shift Registers Overview

The SN74HC164PWR is an 8-bit parallel-out serial shift register manufactured by Texas Instruments in a 14-pin TSSOP package. It operates within a supply voltage range of 2 V to 6 V and supports an operating temperature from -40°C to 125°C. The device features AND-gated serial inputs (A and B) and an asynchronous clear (CLR) input. Typical propagation delay is 20 ns, with maximum clock frequencies reaching 36 MHz at 6 V. Output drive capability is ±4 mA at 5 V, and it can drive up to 10 LSTTL loads.

Shift Registers Feature Summary

• AND-gated serial inputs allow complete control over incoming data entry
• Asynchronous clear function resets all registers immediately upon activation
• Fully buffered clock and serial inputs ensure signal integrity
• Low power consumption with maximum ICC of 80 µA

Shift Registers Applications

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

Shift Registers Procurement Notes

Verify the specific ordering suffix 'PWR' corresponds to the TSSOP-14 package variant when sourcing. Confirm RoHS compliance status and lead finish details via the manufacturer's current orderable addendum. Ensure the component meets the required thermal resistance specifications for the intended PCB layout environment.

Shift Registers Selection Notes

Select this component for designs requiring serial-to-parallel conversion with low power constraints. Verify that the 2 V to 6 V operating voltage range aligns with the system power supply. Ensure the TSSOP-14 package dimensions fit the available PCB footprint and that the -40°C to 125°C temperature rating satisfies environmental requirements.

Shift Registers Part Context

This part belongs to the SNx4HC164 family of high-speed CMOS logic devices. It serves as an 8-bit shift register alternative to older TTL technologies, offering improved speed and lower power dissipation. The HC series provides compatibility with standard logic families while supporting wider voltage ranges.

Shift Registers Replacement Considerations

SN74HC164DR

Shift Registers FAQ

How do the AND-gated serial inputs function?

Data enters the first flip-flop only when both serial inputs A and B are high. A low level 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?

Clocking occurs on the low-to-high-level transition of the CLK pin. Data stored in the first register propagates to subsequent registers upon each positive-edge trigger.