AT27C512R-12RC

Memory IC Overview

The AT27C512R-12RC is a 524,288-bit (64K x 8) one-time programmable read-only memory (OTP EPROM) manufactured by Microchip Technology. It features a fast read access time of 120 ns and operates on a single 5V ± 10% power supply. The device utilizes high-reliability CMOS technology with low standby current of 100 μA max and active current of 20 mA max at 5 MHz. It is housed in a 32-Lead Plastic J-Leaded Chip Carrier (PLCC) package and supports commercial temperature ranges from 0°C to 70°C.

Memory IC Feature Summary

• Supports Rapid™ Programming Algorithm for efficient byte programming
• Includes integrated product identification code for manufacturer verification
• Features CMOS and TTL compatible inputs and outputs
• Provides hardware write protection via OE/VPP pin

Memory IC Applications

• Firmware storage in microprocessor systems
• Industrial control applications
• Commercial embedded systems requiring non-volatile code storage

Memory IC Procurement Notes

Verify the specific suffix RC corresponds to the 32-Lead PLCC package and commercial temperature range as defined in the official ordering information table. Confirm that the component is an OTP device requiring specialized programming equipment utilizing the Rapid™ algorithm. Ensure compatibility with 5V logic levels and check for end-of-life status through official Microchip channels before finalizing procurement plans.

Memory IC Selection Notes

Select this component when a 64K x 8 capacity is required with a 120 ns access speed in a PLCC package. It is suitable for designs needing low-power standby operation and robust ESD protection. Consider the OTP nature of the device, which prevents post-manufacturing data modification, making it ideal for fixed firmware applications where cost-effective mass production programming is necessary.

Memory IC Part Context

The AT27C512R series belongs to Microchip's family of high-performance OTP EPROMs designed for replacing mask ROMs. These devices offer flexibility in prototyping and production by allowing field or factory programming. The -12RC variant specifically denotes the 120 ns speed grade within the commercial temperature bracket, packaged in the industry-standard 32-pin PLCC form factor.

Memory IC Replacement Considerations

Direct replacements include other AT27C512R variants with different speed grades or packages, such as AT27C512R-90RC or AT27C512R-12PC, provided pinout and voltage requirements remain identical. Cross-brand equivalents must match the 64K x 8 organization, 5V supply, and PLCC footprint.