27C512-55DM/B

Overview

The Rochester Electronics 27C512-55DM/B is a 512Kb One-Time Programmable Read-Only Memory (OTP ROM) IC. It features a parallel interface with a maximum access time of 55ns. The device utilizes a 32-pin Ceramic Dual In-Line Package (CDIP). It operates as a static memory component designed for applications requiring non-volatile data storage without the need for periodic refreshing.

Feature Summary

• Provides 512Kb of non-volatile data storage capacity in a single-chip configuration.
• Supports fast parallel data access suitable for high-speed system integration.
• Utilizes a robust ceramic dual in-line package for enhanced environmental durability.

Applications

• Embedded systems requiring permanent firmware storage
• Industrial control hardware with fixed logic requirements
• Automotive electronic modules needing reliable non-volatile memory

Procurement Notes

Verify the specific lot date code and manufacturing origin upon receipt, as Rochester Electronics sources components from various qualified foundries. Confirm that the ceramic package integrity remains uncompromised during transit. Ensure that the OTP nature of the device is acknowledged, as programming cannot be reversed or altered after the initial write operation is completed.

Selection Notes

Select this component when a 512Kb capacity with 55ns access speed is required in a hermetic ceramic package. It serves as a direct functional replacement for original manufacturer equivalents within the same density class. Consider the CDIP form factor for through-hole mounting requirements where standard plastic packages are unsuitable for harsh environments.

Part Context

This part belongs to the 27C series of EPROM/OTP devices, representing a standard density level for legacy microcontroller support. The '55' suffix denotes the specific access time performance tier, while 'DM/B' indicates the 32-pin CDIP package variant. It is categorized under general-purpose non-volatile memory solutions for industrial and commercial electronics.

Replacement Considerations

Compatible substitutes include other 512Kb OTP ROMs in 32-pin CDIP packages with equal or faster access times. Verify pin compatibility and voltage levels before swapping. Original manufacturers such as Intel or AMD may have produced equivalent parts in this family.