SN74LS166ANS

Shift Registers Overview

The SN74LS166ANS is an 8-bit parallel-in/serial-out shift register from the Texas Instruments SN74LS166A series. It operates on a bipolar LS logic family with a standard 5 V supply voltage range of 4.75 V to 5.25 V. The device features positive-edge triggering and asynchronous reset functionality, housed in a 16-pin SOIC package. It supports serial-to-serial and parallel-to-serial data conversion modes.

Shift Registers Feature Summary

• Supports parallel loading of eight bits of data for immediate output access
• Provides serial shifting capability through a single output line
• Includes an asynchronous clear input for immediate state initialization

Shift Registers Applications

• Data acquisition systems requiring parallel-to-serial conversion
• Digital signal processing interfaces
• Microcontroller peripheral expansion circuits

Shift Registers Procurement Notes

Verify the specific suffix 'ANS' against the manufacturer's official datasheet to confirm pinout compatibility and package dimensions. Ensure the procurement source provides valid RoHS compliance documentation as required by project specifications. Cross-reference the part number with the latest Texas Instruments product selection guide to avoid obsolete variants.

Shift Registers Selection Notes

Select this component when an 8-bit shift register with parallel load capability is required within the LS logic family constraints. Consider the 25 ns propagation delay and 0°C to +70°C operating temperature range for environmental suitability. Verify that the 16-pin SOIC footprint matches the target PCB layout requirements.

Shift Registers Part Context

This component belongs to the widely adopted SN74xx logic family, specifically designed for general-purpose digital applications. The SN74LS166A variant offers improved speed over standard TTL while maintaining low power consumption characteristics typical of the Low-power Schottky series.

Shift Registers Replacement Considerations

Compatible substitutes include SN74LS166ADRG4 and SN74LS166ADR. Verify pin compatibility before substitution.