25AA640A-E/P

Memory IC Overview

The Microchip Technology 25AA640A-E/P 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 qualified under AEC-Q100 standards for automotive applications and functions reliably across an extended temperature range from -40°C to +125°C.

Memory IC Feature Summary

• Supports block write protection allowing selection of none, one-quarter, one-half, or all array segments.
• Includes built-in power-on/off data protection circuitry and a write enable latch mechanism.
• Features a hold pin capability to pause serial communication without resetting the sequence.

Memory IC Applications

• Automotive electronic systems requiring AEC-Q100 qualification
• Industrial control devices operating in extended temperature environments
• Embedded memory storage for microcontroller-based architectures

Memory IC Procurement Notes

Verify that the specific part number suffix matches the required package type and temperature grade. Confirm the 'E' designation corresponds to the extended industrial temperature range of -40°C to +125°C. Ensure compatibility with the host system's SPI voltage levels and clock speed requirements before finalizing procurement orders.

Memory IC Selection Notes

Select this component when automotive reliability and wide temperature operation are mandatory. The 25AA640A-E/P differs from commercial variants by its extended thermal rating and AEC-Q100 qualification. Choose this over the 25LC640A variant if the application requires operation below 2.5V, as the AA series supports 1.8V minimum supply voltage.

Memory IC Part Context

This device belongs to the 25XX640A family of 64-Kbit serial EEPROMs manufactured by Microchip Technology. The family includes variations such as the 25LC640A and different package options like MSOP, SOIC, and TSSOP. The '-P' suffix specifically denotes the 8-lead PDIP package format.

Memory IC Replacement Considerations

Public confirmed substitute part numbers: 25AA640A-I/P (Industrial Temperature), 25LC640A-E/P (Commercial Voltage Range).