SN74HC166PWG4

Shift Registers Overview

The SN74HC166PWG4 is an 8-bit parallel-load shift register from the Texas Instruments HC logic family. It operates within a supply voltage range of 2V to 6V and utilizes a 16-pin TSSOP package with dimensions of 5.00mm by 4.40mm. The device features synchronous loading, serial-to-serial shifting, and an asynchronous clear function. It supports operating temperatures from -55°C to 125°C.

Shift Registers Feature Summary

• Synchronous parallel data loading capability
• Asynchronous direct overriding clear input
• TTL-compatible CMOS inputs for interfacing

Shift Registers Applications

• Increasing microcontroller input/output capacity
• Parallel-to-serial data conversion
• General-purpose digital logic shifting

Shift Registers Procurement Notes

Verify the specific ordering suffix 'PWG4' against the manufacturer's current documentation to confirm the exact package type, lead finish, and environmental compliance status. Ensure the component meets the required thermal and electrical specifications for the intended application environment before procurement.

Shift Registers Selection Notes

Select this component when an 8-bit shift register with synchronous parallel load and asynchronous clear is required. Consider the wide operating voltage range and high-speed performance characteristics suitable for interfacing with standard logic families in embedded systems.

Shift Registers Part Context

This part belongs to the SNx4HC166 series of 8-bit parallel-load shift registers manufactured by Texas Instruments. The series provides versatile data shifting capabilities with robust CMOS technology, designed for reliable operation across a broad temperature range and supply voltage spectrum.

Shift Registers Replacement Considerations

SN74HC166DRG4

Shift Registers FAQ

How does the SH/LD input control the device mode?

When SH/LD is low, parallel data is loaded synchronously on the clock edge. When SH/LD is high, the device shifts serial data from the SER input on each clock pulse.

What is the function of the CLR input?

The CLR input provides an asynchronous clear function that overrides all other inputs, including the clock, resetting all flip-flops to zero immediately.