25LC640AT-E/MNY

Overview

The Microchip Technology 25LC640AT-E/MNY is a 64-Kbit (8192 x 8-bit) Serial Electrically Erasable PROM. It utilizes an SPI-compatible serial bus for data access, supporting clock frequencies up to 10 MHz. The device operates within a supply voltage range of 2.5V to 5.5V and features a 32-byte page write buffer. It includes hardware write protection via the WP pin and software block protection. The component is qualified for automotive applications under AEC-Q100 standards and supports an extended industrial temperature range of -40°C to +125°C.

Feature Summary

• Supports high-speed SPI communication with clock rates up to 10 MHz
• Includes built-in power-on/off data protection and write enable latch mechanisms
• Features programmable block write protection for specific array segments
• Designed for low-power operation with standby current as low as 1 µA

Applications

• Automotive electronic systems requiring AEC-Q100 qualification
• Industrial control units needing non-volatile data storage
• Embedded microcontroller systems utilizing SPI interfaces

Procurement Notes

Verify that the ordering suffix MNY corresponds to the specific package type required for your design, as this series offers multiple package options including MSOP, SOIC, and TSSOP. Confirm the temperature grade E indicates the extended range capability. Ensure compatibility with the 2.5V to 5.5V supply voltage requirements of your target application circuit before finalizing procurement.

Selection Notes

Select this part when an SPI interface is preferred over I2C or parallel buses. Choose the Extended temperature grade (E) if the operating environment exceeds standard industrial limits. Consider the 32-byte page size for write efficiency. Verify that the system voltage remains within the specified 2.5V to 5.5V range to ensure reliable operation and adherence to electrical characteristics.

Part Context

This component belongs to the 25LC640A family of 64-Kbit Serial EEPROMs from Microchip Technology. It shares functional similarities with the 25AA640A, differing primarily in supply voltage specifications. The family is designed for general-purpose non-volatile memory storage in embedded systems, offering high endurance and long data retention capabilities.

Replacement Considerations

Public confirmed substitute part numbers: 25LC640AT-I/MNY, 25LC640AT-E/MS, 25LC640AT-E/SN, 25LC640AT-E/ST.