25AA256-E/P

Memory IC Overview

The Microchip Technology 25AA256-E/P is a 256 Kbit Serial Electrically Erasable PROM featuring a 32,768 x 8-bit organization. It interfaces via an SPI-compatible serial bus with a maximum clock frequency of 10 MHz at 4.5V to 5.5V supply voltages. The device operates within a supply voltage range of 1.8V to 5.5V and supports extended temperature ranges from -40°C to +125°C. It utilizes low-power CMOS technology and includes hardware write protection capabilities.

Memory IC Feature Summary

• Supports high-speed SPI communication with up to 10 MHz clock frequency
• Includes programmable block write protection for array security
• Features built-in power-on/off data protection circuitry
• Provides hold functionality to pause serial transmission without resetting sequences

Memory IC Applications

• Microcontroller system data storage
• Configuration parameter retention
• Calibration value storage in industrial equipment

Memory IC Procurement Notes

Verify the specific suffix 'E' confirms the extended temperature rating (-40°C to +125°C) and the 'P' indicates the PDIP-8 package. Confirm the datasheet revision matches the required specifications. Ensure the source document explicitly lists the 25AA256-E/P variant to validate voltage and thermal parameters.

Memory IC Selection Notes

Select this component when SPI interface compatibility is required alongside low-voltage operation down to 1.8V. The extended temperature grade suits harsh environments. Consider page write limits and block protection settings during firmware design. Verify pinout alignment with existing PCB layouts for the PDIP-8 package.

Memory IC Part Context

This part belongs to the 25XX256 family of SPI Serial EEPROMs manufactured by Microchip Technology. It shares functional similarities with the 25LC256 but differs in minimum operating voltage requirements. The family offers various packaging options including SOIC, TSSOP, and DFN variants.

Memory IC Replacement Considerations

The 25LC256 serves as a compatible alternative within the same family, though it requires a higher minimum supply voltage of 2.5V compared to the 1.8V requirement of the 25AA256.