27S185APC

Overview

The AM27S185APC is a bipolar OTP ROM manufactured by Rochester Electronics, LLC. It features a memory organization of 2Kx4 bits, providing a total density of 8192 bits. The device operates in synchronous mode with parallel interface capabilities. It is housed in a 20-pin DIP package (R-PDIP-T20). Electrical specifications include a nominal supply voltage of 5V, with an operating range from 4.75V to 5.25V. The component supports a maximum operating temperature of 75°C and utilizes plastic/epoxy encapsulation.

Feature Summary

• Single-time programmable read-only memory architecture for permanent data storage
• Bipolar technology ensuring high-speed synchronous operation
• Parallel data interface for direct system integration
• Industrial temperature rating suitable for standard operational environments

Applications

• Firmware storage in legacy industrial control systems
• Configuration data retention in embedded microprocessor systems
• Boot code storage for older computer architectures
• Fixed logic replacement in vintage test equipment

Procurement Notes

Verify the specific suffix 'APC' against the original manufacturer datasheet to confirm pinout and electrical characteristics match your design requirements. Ensure the OTP status is compatible with your production needs, as programming cannot be reversed. Confirm the package type is DIP-20 and validate the temperature range against your environmental constraints before finalizing the order.

Selection Notes

Select this component when a non-volatile, one-time programmable solution is required for fixed code or data in bipolar-based systems. Consider the 2Kx4 organization and parallel interface compatibility with existing bus structures. Evaluate the synchronous timing requirements against your clock speeds. Verify that the 5V logic levels align with your system's I/O standards and that the DIP package fits your PCB layout constraints.

Part Context

Rochester Electronics specializes in end-of-life and obsolete semiconductors, acting as an authorized source for components no longer produced by original manufacturers. This part belongs to the AM27S series of PROMs, which were widely used in early computing and industrial applications. Rochester provides these devices through licensed manufacturing or existing stock, ensuring traceability and quality for lifecycle management.

Replacement Considerations

Direct replacements must match the 2Kx4 organization, bipolar technology, and DIP-20 package. Verify compatibility with the original manufacturer's pinout if substituting with other brands. Ensure the replacement maintains the same voltage and temperature specifications.