FM27C512Q90

Memory IC Overview

The FM27C512Q90 is a high-performance CMOS EPROM with a storage capacity of 524,288 bits (64K x 8). It features a 90 ns access time and operates on a single +5V supply. The device utilizes Fairchild’s proprietary AMG technology for reliability. It supports standard JEDEC pin configurations in 32-pin PLCC or 28-pin CERDIP packages. Operating temperatures range from 0°C to +70°C for commercial versions.

Memory IC Feature Summary

• High-speed data retrieval suitable for no wait-state operation with high-performance CPUs
• Turbo programming algorithm enables efficient parallel programming with minimal pulses
• Integrated manufacturer identification code for automatic programmer recognition
• Low power standby mode reduces active power dissipation by over 99%

Memory IC Applications

• Microprocessor-based system firmware storage
• Operating system and application software retention
• Code storage for firmware-based equipment

Memory IC Procurement Notes

Verify the specific suffix Q90 against official datasheets to confirm the 90 ns speed grade and package type. Ensure compatibility with existing UV erasure infrastructure if reprogramming is required. Confirm that the supplier provides genuine Fairchild Semiconductor products, as this component may be obsolete.

Memory IC Selection Notes

Select this component when a fast 90 ns access time is required for direct CPU interfacing without wait states. Choose the CERDIP package for systems requiring a quartz window for field erasure. Consider the PLCC variant for surface-mount applications where erasure is not needed post-assembly.

Memory IC Part Context

This part belongs to the FM27C512 family of high-density EPROMs manufactured using CMOS AMG technology. It serves as a non-volatile memory solution for legacy microprocessor systems. The device offers an upgrade path for systems utilizing standard JEDEC pinouts.

Memory IC Replacement Considerations

Check for FM27C512 variants with different access times (120 ns, 150 ns) or package types (PLCC vs. CERDIP). Verify functional compatibility with existing 27C512 pinouts if substituting.