25AA256-E/MF

Memory IC Overview

The Microchip Technology 25AA256-E/MF is a 256 Kbit (32,768 x 8-bit) Serial Electrically Erasable PROM. It utilizes an SPI-compatible serial bus with SCK, SI, SO, and CS signals for communication. The device operates within a supply voltage range of 1.8V to 5.5V and supports a maximum clock frequency of 10 MHz at 4.5V to 5.5V. It features a 64-byte page size, self-timed erase/write cycles up to 5 ms, and block write protection. The component is housed in an 8-lead DFN package and supports extended temperature ranges.

Memory IC Feature Summary

• Supports high-speed SPI serial interface with hold functionality for bus pausing
• Includes hardware and software write protection mechanisms
• Features low-power CMOS technology with standby current reduction
• Provides high reliability with long data retention and endurance ratings

Memory IC Applications

• Microcontroller system data storage
• Configuration parameter storage
• Calibration data retention
• Device identification information storage

Memory IC Procurement Notes

Verify the specific suffix 'E' indicates extended temperature operation (-40°C to +125°C) and 'MF' denotes the 8-lead DFN package. Confirm RoHS compliance status as per the latest manufacturer documentation. Ensure the ordering code matches the required voltage and speed specifications for your application design.

Memory IC Selection Notes

Select this part when SPI interface compatibility is required alongside low-voltage operation down to 1.8V. Consider the 64-byte page write capability for efficient data management. Evaluate the need for hardware write protection via the WP pin if security against inadvertent writes is critical for the target system environment.

Memory IC Part Context

This component belongs to the 25XX256 family of Serial EEPROMs from Microchip Technology. It shares architectural similarities with the 25LC256 but differs in minimum operating voltage requirements. The family offers various package options including PDIP, SOIC, TSSOP, and DFN to accommodate different PCB layout constraints and thermal management needs.

Memory IC Replacement Considerations

Direct substitutes include other 256Kbit SPI EEPROMs from Microchip such as the 25LC256 series, provided voltage levels and package types are compatible. Verify pinout compatibility and electrical characteristics before substitution.