25AA256T-I/SN

Memory IC Overview

The Microchip Technology 25AA256T-I/SN is a 256 Kbit Serial Electrically Erasable PROM featuring a 32,768 x 8-bit organization. It utilizes an SPI-compatible serial bus with a maximum clock frequency of 10 MHz. The device operates within a supply voltage range of 1.8 V to 5.5 V and supports industrial temperature ranges from -40°C to +85°C. It is housed in an 8-lead SOIC package.

Memory IC Feature Summary

• Supports block write protection for none, one-quarter, one-half, or all array segments via status register configuration.
• Includes built-in power-on/off data protection circuitry and a dedicated write-protect pin.
• Features a hold input that allows suspension of serial communication without resetting the sequence.

Memory IC Applications

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

Memory IC Procurement Notes

Verify the specific suffix 'T' indicates tape-and-reel packaging when ordering. Confirm the 'I' designation matches the required industrial temperature range of -40°C to +85°C. Ensure the 1.8V minimum operating voltage aligns with the target system's power supply capabilities before finalizing procurement.

Memory IC Selection Notes

Select this component for applications requiring low-voltage operation down to 1.8V. The 10 MHz clock speed supports high-throughput data transfer needs. Consider the 64-byte page size for efficient sequential writing operations. Verify compatibility with existing SPI controller interfaces on the host microcontroller.

Memory IC Part Context

This part belongs to the 25AA256/25LC256 family of 256 Kbit SPI EEPROMs. The 'AA' variant specifically supports lower voltage operation starting at 1.8V compared to other family members. The 'SN' suffix denotes the 8-lead narrow SOIC package format used for surface-mount assembly.

Memory IC Replacement Considerations

The 25LC256 is a compatible alternative within the same datasheet specification. Verify that the replacement part meets the 1.8V minimum voltage requirement if the application relies on low-voltage operation.