SN74HC165DRE4

Shift Registers Overview

The SN74HC165DRE4 is an 8-bit parallel-load shift register manufactured by Texas Instruments. It belongs to the HC logic family and utilizes CMOS technology. The device features eight direct data inputs (A through H) for parallel loading and provides a serial output at QH. It operates with a supply voltage range of 2 V to 6 V and supports a maximum operating frequency of 25 MHz. The component is housed in a 16-pin SOIC package and is designed for industrial temperature ranges up to 85 °C.

Shift Registers Feature Summary

• Provides parallel-to-serial data conversion capability via dedicated parallel load functionality.
• Features asynchronous serial input for cascading multiple units to expand bit capacity.
• Delivers complementary serial outputs to support various interface requirements.

Shift Registers Applications

• Microcontroller I/O expansion for reading multiple switch states
• Keyboard matrix scanning systems
• Industrial control panel input monitoring

Shift Registers Procurement Notes

Verify the specific suffix 'E4' against the manufacturer's current datasheet to confirm RoHS compliance status and exact package dimensions. Ensure the ordering quantity aligns with the manufacturer's standard reel sizes to avoid additional handling fees or minimum order constraints during procurement.

Shift Registers Selection Notes

Select this component when an 8-bit parallel input interface is required with minimal microcontroller pin usage. The HC series offers compatibility with standard 5 V and 3.3 V logic levels. Consider the SOIC package for surface mount assembly processes and verify that the 25 MHz speed meets the system's timing requirements.

Shift Registers Part Context

This part is a member of the SN74HC165 family, which includes variants with different packaging options such as TSSOP or DIP. The 'D' designation indicates the SOIC package type, while 'RE4' specifies the tape and reel packaging configuration. It serves as a standard solution for expanding digital input capabilities in embedded systems.

Shift Registers Replacement Considerations

Check for SN74HC165DR or SN74HC165DBR as potential functional equivalents from the same family. Verify pinout compatibility and electrical specifications before substitution. Alternative manufacturers may offer compatible parts, but ensure logic level and package differences are addressed.