27C512AE200/883C

Overview

The National Semiconductor 27C512AE200/883C is a high-speed CMOS EPROM providing 512 kilobits of non-volatile memory. It features a 64K x 8 organization and operates with a 200 ns access time. The device utilizes a standard parallel interface with three-state outputs for flexible system integration. Designed for MIL-STD-883C compliance, it supports industrial temperature ranges and includes an on-chip UV erasable window for reprogramming. The component is housed in a ceramic dual in-line package suitable for through-hole mounting.

Feature Summary

• MIL-STD-883C certified construction ensuring reliability for defense applications
• High-speed 200 ns access time for efficient data retrieval
• UV erasable capability allowing multiple program cycles
• Three-state outputs enabling direct bus interfacing

Applications

• Military avionics systems requiring radiation-hardened or qualified components
• Industrial control units needing reliable non-volatile storage
• Embedded firmware storage in aerospace equipment

Procurement Notes

Verify the specific suffix /883C confirms MIL-STD-883C qualification status upon ordering. Confirm that the ceramic package variant matches the required environmental specifications. Ensure the UV window integrity is intact if optical erasure is planned. Check for lead-free plating requirements against legacy military standards. Validate the manufacturer source to avoid counterfeit components.

Selection Notes

Select this part when MIL-STD-883C compliance is mandatory for the application environment. Choose this model over plastic variants if superior thermal stability and mechanical robustness are required. Consider the 200 ns speed as sufficient for most microprocessor-based systems. Verify that the UV erasure requirement aligns with the project lifecycle needs.

Part Context

This component belongs to the 27C512 series of CMOS EPROMs manufactured by National Semiconductor. It represents the hermetic ceramic version compliant with military standards. The series provides a cost-effective solution for storing code and data in systems where power loss must not result in data loss. It serves as a bridge between older TTL technologies and modern CMOS architectures.

Replacement Considerations

Direct replacements include other MIL-STD-883C qualified 27C512 parts from manufacturers like AMD or Intel. Verify pin compatibility and electrical parameters before substitution. Plastic equivalents lack the hermetic seal required for harsh environments.