SN74HC165APWR

Shift Registers Overview

The SN74HC165APWR is an 8-bit parallel-load shift register from the Texas Instruments SN74HC165 family. It operates within a supply voltage range of 2 V to 6 V and supports a maximum clock frequency of 25 MHz at 4.5 V. The device features eight direct data inputs (A–H) enabled by a low-level Shift/Load signal, allowing simultaneous parallel loading. Clocking occurs via rising-edge transitions on the CLK input while SH/LD is high and CLK INH is low. It provides complementary serial outputs (QH and QH_bar) and includes a clock-inhibit function.

Shift Registers Feature Summary

• Parallel-to-serial data conversion with simultaneous 8-bit parallel loading capability
• Complementary serial output configuration for flexible interfacing
• Interchangeable clock control through dedicated CLK and CLK INH pins
• Direct overriding load inputs that function independently of clock signals

Shift Registers Applications

• Programmable Logic Controllers
• Appliances
• Video Display Systems
• Keyboards

Shift Registers Procurement Notes

Verify the specific ordering suffix APWR corresponds to the TSSOP-16 package variant when sourcing. Confirm RoHS compliance status and lead times directly with authorized distributors or Texas Instruments. Ensure the component meets the required operating temperature range of -40°C to 125°C for your specific application environment before finalizing procurement.

Shift Registers Selection Notes

Select this component for designs requiring expansion of digital inputs using limited GPIO resources. It is suitable for applications needing reliable parallel-to-serial conversion with CMOS logic compatibility. Consider the wide operating voltage range and low power consumption characteristics when designing for battery-operated or energy-efficient systems.

Shift Registers Part Context

This part belongs to the SNx4HC165 family of 8-bit parallel-load shift registers manufactured by Texas Instruments. The HC series denotes High-speed CMOS technology, offering performance comparable to LS TTL but with lower power consumption. The device is designed for general-purpose digital logic applications requiring robust noise immunity and wide voltage operation.

Shift Registers Replacement Considerations

Compatible substitutes include SN74HC165DR and SN74HC165PWRG3. Verify pinout compatibility and electrical specifications against the original datasheet requirements before implementation.