NMC27C64N200

Memory IC Overview

The NMC27C64N200 is a 64K-bit (8K x 8) CMOS EPROM memory integrated circuit manufactured by onsemi. It features a parallel interface and operates within a supply voltage range of 4.5V to 5.5V. The device has an access time of 200 ns and supports a standard operating temperature range of 0°C to 70°C. It is housed in a 28-pin Ceramic Dual In-Line Package (CDIP) with a UV window for erasure.

Memory IC Feature Summary

• Non-volatile storage utilizing UV-erasable EEPROM technology
• Parallel data interface for direct system integration
• Robust ceramic packaging with transparent window for reprogramming

Memory IC Applications

• Industrial control systems requiring non-volatile code storage
• Embedded applications needing field-reprogrammable firmware
• Legacy hardware maintenance and prototyping

Memory IC Procurement Notes

Verify the integrity of the UV window seal before installation, as exposure to ambient light can cause data loss. Confirm that the specific revision matches the required pinout and electrical specifications. Ensure programming equipment supports the 4.5V to 5.5V supply range and 200 ns timing constraints. Check for RoHS compliance status if environmental regulations apply to the final assembly.

Memory IC Selection Notes

Select this component when a parallel interface and high-density non-volatile storage are required in a through-hole package. Consider the 200 ns access speed against system clock requirements. Evaluate the need for UV erasability versus one-time programmable alternatives. Verify thermal management capabilities within the 0°C to 70°C operating range for the intended environment.

Memory IC Part Context

This part belongs to the NM27C51 series of high-speed CMOS EPROMs. It provides a cost-effective solution for storing binary data or program code that must be retained without power. The CDIP package offers mechanical stability and ease of handling during manual programming or replacement in older electronic designs.

Memory IC Replacement Considerations

Direct replacements include other 64K-bit parallel EPROMs in 28-CDIP packages with matching 200 ns access times and 5V operation. Verify pin compatibility and voltage tolerances before substitution.