7420PC

Overview

The Fairchild Semiconductor 7420PC is a dual 4-input NAND gate integrated circuit manufactured in the TTL logic family. It features a ceramic dual in-line package (CDIP) with 14 pins, designed for through-hole mounting. The device operates at a nominal supply voltage of 5 V and supports an operating temperature range from -55°C to 125°C. Key electrical specifications include a maximum propagation delay of 22 ns and a maximum power supply current of 11 mA. The component is classified as non-compliant with RoHS standards.

Feature Summary

• Contains two independent gates performing the NAND logic function
• Utilizes a robust ceramic dual in-line package for durability
• Supports wide industrial and military temperature ranges

Applications

• Digital logic circuits requiring dual 4-input NAND functionality
• Industrial control systems operating in harsh environments
• Military-grade electronic equipment design

Procurement Notes

Verify RoHS compliance status prior to procurement, as this specific part number is listed as non-compliant. Confirm that the CDIP package dimensions match the target PCB footprint. Ensure the supplier provides valid traceability documentation given the component's age and potential availability from secondary markets.

Selection Notes

Select this component when a ruggedized ceramic package is required for high-temperature or high-reliability applications. Compare against plastic DIP alternatives if cost reduction is prioritized over environmental resilience. Verify that the 5V TTL logic levels align with the system's input requirements.

Part Context

This part belongs to the standard 74-series logic family, specifically the 7420 variant which houses two 4-input NAND gates. It is produced by Fairchild Semiconductor, now part of onsemi. The CDIP packaging distinguishes it from common plastic variants, offering superior thermal and mechanical stability for specialized industrial uses.

Replacement Considerations

Cross-reference with DM7420N or other 7420 equivalents from manufacturers like National Semiconductor or Motorola. Ensure pin compatibility and verify that the replacement package type meets the physical constraints of the existing assembly.