25AA640AT-I/MNY

Memory IC Overview

The Microchip Technology 25AA640AT-I/MNY is a 64-Kbit serial Electrically Erasable PROM featuring an SPI-compatible interface. It operates within a voltage range of 1.8V to 5.5V and supports clock frequencies up to 10 MHz at 5.5V. The device utilizes an 8192 x 8-bit organization with a 32-byte page size. It is housed in an 8-lead TDFN package and qualified for the industrial temperature range of -40°C to +85°C.

Memory IC Feature Summary

• Supports Serial Peripheral Interface (SPI) communication with separate data input and output lines.
• Includes hardware write protection via a dedicated pin and software control through the STATUS register.
• Features a HOLD pin to pause serial communication without resetting the sequence.
• Provides high reliability with guaranteed endurance and long-term data retention.

Memory IC Applications

• Data logging in industrial sensor networks
• Configuration storage for microcontroller systems
• Parameter storage in automotive electronic modules

Memory IC Procurement Notes

Verify the specific suffix 'T' indicates tape-and-reel packaging when ordering. Confirm the 'I' designation matches the required industrial temperature range for your application environment. Ensure the MNY package type aligns with your PCB footprint requirements before finalizing procurement.

Memory IC Selection Notes

Select this component for applications requiring low-power non-volatile memory with SPI connectivity. It is suitable for systems operating between 1.8V and 5.5V. Consider the 32-byte page write limit when designing firmware to optimize write performance and prevent page boundary overwrites.

Memory IC Part Context

This part belongs to the 25AA640A/25LC640A family of 64K-bit serial EEPROMs. It shares functional compatibility with other members of the series, differing primarily in voltage ranges and package options. The 25AA640A variant specifically supports lower voltage operation starting at 1.8V.

Memory IC Replacement Considerations

The 25LC640A is a compatible alternative within the same family, though it requires a minimum supply voltage of 2.5V instead of 1.8V. Other package variants such as MSOP or SOIC may be used if the footprint allows.