74166PC

Overview

The National Semiconductor 74166PC is a universal shift register. It features parallel load capability and serial input options for data shifting operations. The device supports bidirectional shifting functionality, allowing data to be shifted in either direction based on control signals. It is designed for use in digital logic circuits requiring reliable data storage and transfer capabilities.

Feature Summary

• Universal shift register with parallel load capability
• Bidirectional shifting functionality
• Serial input options for data entry

Applications

• Digital data storage systems
• Serial-to-parallel conversion circuits
• Parallel-to-serial conversion applications

Procurement Notes

Verify the manufacturer origin as National Semiconductor or Texas Instruments due to acquisition history. Confirm package type matches PC designation. Check datasheet revisions for pin compatibility. Ensure component authenticity through authorized channels. Validate specifications against original National Semiconductor documentation.

Selection Notes

Consider voltage requirements and logic family compatibility. Evaluate speed parameters for target application frequency. Assess power consumption characteristics. Verify operating temperature range suitability. Check availability of equivalent parts from current manufacturers.

Part Context

The 74166 series belongs to standard logic shift register families. National Semiconductor produced these components before Texas Instruments acquisition. The PC suffix typically indicates plastic DIP packaging. These devices remain relevant for legacy system maintenance and replacement scenarios.

Replacement Considerations

Equivalent parts include SN54LS166 and SN74LS166 variants. Verify pin compatibility before substitution. Check electrical specifications match original requirements. Consider modern equivalents like 74HC166 for improved performance.