SN74HC165PWR

Shift Registers Overview

The SN74HC165PWR is an 8-bit parallel-load shift register manufactured by Texas Instruments. It converts parallel input data into a serial output stream, facilitating efficient data transmission in digital systems. The device operates within a supply voltage range of 2 V to 6 V and supports a maximum clock frequency of 25 MHz at 5 V. It features a serial output for daisy-chaining multiple units and includes a serial input for cascading. The component is housed in a 16-pin TSSOP package and is rated for operation across an extended temperature range from -40°C to +125°C.

Shift Registers Feature Summary

• Parallel-to-serial conversion capability with dedicated parallel load control
• Serial output enables cascading of multiple devices for expanded I/O capacity
• CMOS technology ensures low power consumption and high noise immunity

Shift Registers Applications

• Keyboard scanning interfaces
• LED display multiplexing
• General-purpose I/O expansion in microcontroller systems

Shift Registers Procurement Notes

Verify the complete part number against official Texas Instruments documentation to ensure correct suffixes and specifications. Confirm RoHS compliance status and packaging details such as tape and reel quantities directly with authorized distributors or the manufacturer. Cross-reference the datasheet revision date to ensure alignment with current design requirements and pinout configurations.

Shift Registers Selection Notes

Select this component when parallel input expansion is required with minimal serial interface usage. Consider the HC logic family for compatibility with standard 5 V and 3.3 V logic levels. Evaluate the TSSOP package size against available PCB space constraints. Ensure the operating temperature range meets the environmental conditions of the target application.

Shift Registers Part Context

This device belongs to the SN74HC165 series of 8-bit parallel-load shift registers. It is part of the broader 74HC logic family, known for high-speed CMOS operation. The series provides a standard solution for converting parallel data to serial format in various digital logic applications.

Shift Registers FAQ

What is the function of the parallel load (PL) pin?

The PL pin controls the loading of parallel data into the shift register. When driven low, it loads the eight parallel inputs into the internal flip-flops. When high, the device shifts data on the rising edge of the clock.

Can multiple SN74HC165PWR devices be connected together?

Yes, multiple devices can be cascaded. The serial output (Q7S) of one device connects to the serial input (DS) of the next, allowing for expansion of the number of parallel inputs.