SN74HC166DRG4

Shift Registers Overview

The SN74HC166DRG4 is an 8-bit parallel-load shift register from the Texas Instruments HC logic family. It converts parallel data into serial output using a single serial input and eight parallel inputs. The device operates within a supply voltage range of 2V to 6V and supports an operating temperature range of -55°C to 125°C. It features synchronous loading, direct overriding clear, and clock inhibit capabilities. The component is housed in a 16-pin SOIC package.

Shift Registers Feature Summary

• Synchronous parallel loading capability controlled by the SH/LD input
• Direct overriding clear function that resets all flip-flops regardless of other inputs
• Clock inhibit functionality allowing flexible clock control via CLK and CLK INH pins

Shift Registers Applications

• Increasing the number of inputs available to a microcontroller
• Parallel-to-serial data conversion for communication interfaces
• General-purpose I/O expansion in digital systems

Shift Registers Procurement Notes

Verify the specific ordering suffix DRG4 corresponds to the desired tape-and-reel packaging configuration. Confirm that the RoHS compliance status matches project requirements. Ensure the manufacturer part number aligns with the exact revision level specified in the design documentation before finalizing procurement orders.

Shift Registers Selection Notes

Select this component when an 8-bit shift register with synchronous parallel load is required. It is suitable for applications needing TTL-compatible CMOS inputs and wide voltage operation. Consider the SOIC package size and thermal characteristics for PCB layout constraints. Verify compatibility with system clock frequencies and capacitive load limits.

Shift Registers Part Context

This device belongs to the SNx4HC166 series of 8-bit parallel-load shift registers manufactured by Texas Instruments. The HC logic family provides standard CMOS inputs with TTL-compatible voltage thresholds. The 'D' suffix indicates the SOIC package type, while 'RG4' denotes specific manufacturing and environmental compliance attributes defined by the supplier.

Shift Registers Replacement Considerations

SN74HC166DR