25LC320T-E/SN

Overview

The Microchip Technology 25LC320T-E/SN is a 32 Kbit serial Electrically Erasable PROM featuring SPI-compatible interface. It offers 4096 x 8 bit organization with 32-byte page write capability. Operating voltage ranges from 2.5V to 5.5V, supporting maximum clock frequencies of 2 MHz at 2.5V and 3 MHz at 4.5V-5.5V. The device ensures high reliability with over 1 million E/W cycles endurance and greater than 200 years data retention. It includes built-in write protection via block protection bits and power-on data protection circuitry.

Feature Summary

• Supports Serial Peripheral Interface (SPI) compatible communication with separate data in and out lines.
• Includes hardware write-protect pin and software-configurable block protection for array segments.
• Features self-timed erase and write cycles with automatic write enable latch management.

Applications

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

Procurement Notes

Verify the specific suffix 'T' indicates tape and reel packaging when ordering. Confirm the '-E' designation corresponds to the Automotive temperature range (-40°C to +125°C). Ensure the '/SN' package type matches the required SOIC-8 footprint for the target PCB design. Cross-reference the datasheet revision to confirm electrical characteristics align with current production standards.

Selection Notes

Select this component for applications requiring non-volatile storage accessed via standard SPI buses. The Automotive grade variant supports wider temperature extremes compared to Industrial versions. Consider the 32-byte page size limitation for write operations, which requires managing address boundaries within the same page to avoid unintended data overwrite during sequential writes.

Part Context

This part belongs to the 25XX320 family of serial EEPROMs manufactured by Microchip Technology. It shares functional similarities with the 25AA320 and 25C320 but differs in operating voltage and speed specifications. The datasheet notes that this specific generation is not recommended for new designs, suggesting consideration of the updated 25LC320A series for future projects.

Replacement Considerations

Public confirmed substitute: 25LC320A-E/SN