The Microchip AT27C512R-45PU: A Robust OTP EPROM for Demanding Applications

In the realm of embedded systems and legacy hardware support, the need for reliable, non-volatile memory remains paramount. The Microchip AT27C512R-45PU stands as a definitive solution in this space, representing a high-performance 64K x 8 One-Time Programmable (OTP) EPROM memory chip. This device is engineered for applications where data permanence and integrity are critical, offering a simple and secure method for storing firmware, boot code, or configuration data without the risk of accidental erasure.

A key feature of this memory chip is its one-time programmable nature. Unlike EEPROM or Flash memory, data written to the AT27C512R-45PU is permanent. This makes it an ideal choice for storing final production code, ensuring that the firmware cannot be altered or corrupted in the field due to software errors or electrical noise. This permanence provides a high level of security and stability for the end product.

The AT27C512R-45PU boasts an organization of 65,536 words by 8 bits (64K), providing a total of 512 kilobits of memory. The -45 suffix in its part number indicates a fast 45ns maximum access time, enabling efficient operation with high-performance microprocessors without requiring wait states. It operates on a single 5V power supply, making it compatible with a vast array of existing TTL-level systems.

Housed in a sturdy 300-mil PDIP (Plastic Dual In-line Package), this chip is designed for through-hole mounting, facilitating easy prototyping, testing, and use in industrial environments. Its standard JEDEC-approved pinout ensures a drop-in replacement for other EPROMs in the 27C512 family, simplifying design upgrades and maintenance.

Manufactured with Microchip’s high-reliability CMOS technology, the device features low power consumption, with an active current of 30mA and a standby current of just 100μA. It also offers a straightforward programming algorithm, requiring a single 5V supply for both programming and read operations, which streamlines the manufacturing process.

In summary, the Microchip AT27C512R-45PU is a dedicated workhorse for developers who require a fast, simple, and absolutely permanent method of data storage. Its combination of speed, capacity, and OTP security makes it a trusted component across aerospace, automotive, industrial control, and telecommunications industries.

ICGOOODFIND: The AT27C512R-45PU is a top-tier choice for engineers seeking a high-speed, high-reliability OTP EPROM for final code storage in 5V systems, offering unmatched data permanence and a industry-standard form factor.

Keywords: OTP EPROM, Non-volatile Memory, 45ns Access Time, 5V Operation, 64K x 8