27C512-150JI

Overview

The Rochester Electronics 27C512-150JI is a 512Kb (64K x 8) UV EPROM manufactured using CMOS technology. It features a maximum access time of 150ns and operates within a standard voltage range. The component utilizes a 32-pin Ceramic Dual In-line Package (CDIP) with a metal lid, designed for parallel asynchronous interface communication. This device supports industrial temperature ranges and provides non-volatile data storage suitable for long-life applications.

Feature Summary

• Provides reliable non-volatile memory storage via UV erasable programmable read-only memory architecture.
• Utilizes a ceramic dual in-line package construction to ensure mechanical integrity and environmental sealing.
• Supports parallel asynchronous data transfer with three-state outputs for system bus compatibility.

Applications

• Industrial control systems requiring long-term data retention
• Embedded firmware storage in legacy hardware platforms
• Automotive electronic modules needing extended lifecycle support

Procurement Notes

Verify the specific suffix 'JI' against official Rochester Electronics documentation to confirm the exact temperature grade and package variant. Ensure that the UV erasure window on the ceramic package remains intact during handling. Confirm that the ordering information matches the required speed grade and voltage specifications for your target application before finalizing procurement.

Selection Notes

Select this component when a 512Kb capacity is required for permanent or semi-permanent code storage. The CDIP package is preferred for high-reliability environments where leaded soldering and robust physical packaging are necessary. Consider the 150ns access time for systems with moderate clock speeds. Verify that the design allows for UV exposure if reprogramming is ever required.

Part Context

This part belongs to the 27C512 family of EEPROMs, originally developed by Intel and now supported by various manufacturers including Rochester Electronics. The series is widely recognized for its use in early computing and industrial equipment. Rochester Electronics continues production to support legacy systems that cannot be easily migrated to modern flash technologies.

Replacement Considerations

Direct replacements include the STMicroelectronics M27C512-150F1 and the Macronix MX27C512MC-15. These parts share similar pinouts and electrical characteristics but may differ in minor package details or manufacturer-specific testing standards.