9401PC

Specialty Logic Overview

The National Semiconductor 9401PC is a specialized logic integrated circuit functioning as an 8-bit magnitude comparator. It is designed to compare two 8-bit binary numbers and provide outputs indicating whether the first number is greater than, less than, or equal to the second. The device operates with standard TTL logic levels and is housed in a plastic DIP package. This component is part of the broader family of specialty logic devices produced by National Semiconductor, now under Texas Instruments.

Specialty Logic Feature Summary

• Performs 8-bit magnitude comparison between two binary inputs
• Provides distinct output signals for greater-than, less-than, and equality conditions
• Compatible with standard TTL logic voltage levels

Specialty Logic Applications

• Digital arithmetic logic units requiring comparison operations
• Control systems needing decision-making based on numerical value differences
• Data processing circuits for sorting or filtering numeric data

Specialty Logic Procurement Notes

Verify the manufacturer source carefully, as National Semiconductor's logic division was acquired by Texas Instruments. Ensure the specific suffix 'PC' matches your board requirements, as it denotes the package type. Cross-reference with current TI documentation to confirm availability and pinout compatibility, as legacy parts may have been discontinued or replaced by newer equivalents.

Specialty Logic Selection Notes

Select this component when an 8-bit hardware comparator is required within a digital system. Consider the operating voltage range and package constraints during integration. Verify that the propagation delay meets the timing requirements of your application. Check for obsolescence status before finalizing the design, as older logic families may require careful supply chain management.

Specialty Logic Part Context

National Semiconductor was a prominent American semiconductor manufacturer known for analog and logic devices. The company was acquired by Texas Instruments in 2011. The 9401PC belongs to the legacy specialty logic product line, which includes comparators, encoders, and decoders. These components were widely used in industrial and consumer electronics before being phased out or superseded by more modern, integrated solutions.

Specialty Logic Replacement Considerations

Check Texas Instruments' official substitution guide for direct replacements. Alternative 8-bit comparators from other manufacturers may require level-shifting or pin-reassignment. Verify electrical characteristics such as propagation delay and input threshold voltages to ensure functional equivalence in the existing circuit design.