The M27C64A-25F1 is a high-speed 64 Kbit UV erasable and programmable read-only memory (EPROM) device produced by STMicroelectronics. This EPROM provides a storage solution for systems that require fast access times and a reliable non-volatile memory. It is well-suited for applications in the field of microprocessor systems, computer BIOS, telecommunications, gaming, and industrial controllers where storage of code or data is essential even when the power is off.

Key Features

• Memory Size: 64 Kbit (8K x 8)
• Access Time: 250 ns
• Single 5V Power Supply: Ideal for systems with standard power requirements.
• Programming Voltage: 12.5V ± 0.25V
• Temporary Sector Unprotection: Allows for sector-based programming.
• UV Erasable: The contents can be erased by exposure to ultraviolet light for chip erasure.

Package and Temperature Range

The M27C64A-25F1 comes in a 28-pin Ceramic DIP (Dual In-line Package), which provides robust physical protection and reliable connectivity for the device. It operates within an extended temperature range, making it suitable for industrial applications with harsh environmental conditions.

Compatibility and Standards

Designed to be compatible with the JEDEC standards, the M27C64A-25F1 ensures interoperability with standard EPROM programmers and development tools. Its compatibility with the JEDEC standard pinout for EPROMs also simplifies the integration process into existing designs.

Programming and Erasure

The device can be programmed using a standard EPROM programmer with the required 12.5V programming voltage. The entire chip can be erased by exposing the die to UV light through the window on the top of the package. This feature allows the device to be reused and reprogrammed multiple times, making it a cost-effective solution for prototyping and small production runs.

Use Cases

With its reliable storage capability and fast access times, the M27C64A-25F1 is an excellent choice for storing firmware, boot code, or any other type of data that must be preserved when power is not supplied to the device. Its robustness and ease of use make it a preferred choice for a wide range of applications in various industries.