25LC640AT-I/MNY

Overview

The Microchip Technology 25LC640AT-I/MNY is a 64-Kbit (8192 x 8-bit) Serial Electrically Erasable PROM accessed via an SPI-compatible bus. It operates within a voltage range of 2.5V to 5.5V and supports a maximum clock frequency of 10 MHz at higher voltages, with reduced speeds at lower voltages. The device features a 32-byte page size, self-timed erase/write cycles up to 5 ms, and industrial temperature ratings from -40°C to +85°C. It utilizes low-power CMOS technology with standby current as low as 1 µA.

Feature Summary

• Supports serial communication via standard SPI interface with separate data in/out lines and chip select control.
• Includes hardware write protection mechanisms such as block protection bits and a dedicated write-protect pin.
• Features power-on/off data protection circuitry and a write enable latch to prevent inadvertent writes.
• Provides high reliability with specified endurance of one million erase/write cycles and long-term data retention.

Applications

• Microcontroller system data storage
• Configuration parameter storage
• Calibration data retention

Procurement Notes

Verify the specific suffix 'MNY' corresponds to the TDFN package type when sourcing. Confirm that the 'I' designation matches the required industrial temperature range for your application environment. Ensure the voltage supply aligns with the 2.5V minimum requirement for this variant.

Selection Notes

Select this component for applications requiring non-volatile memory with SPI connectivity. Consider the 2.5V minimum operating voltage compared to the 1.8V option available in the 25AA640A series. Evaluate the TDFN package dimensions against PCB layout constraints.

Part Context

This part belongs to the 25XX640A family of 64-Kbit Serial EEPROMs. It shares functional specifications with the 25LC640A series but is distinguished by its specific package configuration and voltage operating range defined by the LC prefix.

Replacement Considerations

The 25LC640A-I/MNY serves as a direct equivalent for the 25LC640AT-I/MNY, differing primarily in bulk packaging versus tape-and-reel delivery. Other variants within the 25LC640A series may be compatible if package and voltage requirements are met.