25AA512-I/SN

Memory IC Overview

The Microchip Technology 25AA512-I/SN is a 512 Kbit (64K x 8) serial EEPROM utilizing an SPI-compatible interface. It operates within a voltage range of 1.8V to 5.5V and supports clock frequencies up to 20 MHz at higher voltages. The device features a 128-byte page size, sector write protection for 16KB segments, and hardware write protection via the WP pin. It offers high reliability with over 1 million erase/write cycles and data retention exceeding 200 years.

Memory IC Feature Summary

• Supports byte, page, sector, and chip erase operations without requiring prior erasure for writes.
• Includes programmable sector write protection allowing partial or full array locking.
• Features deep power-down mode for minimal standby current consumption.
• Provides electronic signature identification and hold functionality for bus pausing.

Memory IC Applications

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

Memory IC Procurement Notes

Verify the specific suffix 'I' confirms industrial temperature range (-40°C to +85°C). Confirm the 'SN' package designation matches the required SOIC-8 footprint. Ensure the datasheet revision aligns with the intended design specifications. Check for AEC-Q100 qualification if automotive compliance is mandatory.

Memory IC Selection Notes

Select this component when SPI interface compatibility is required alongside non-volatile storage needs. Consider the 20 MHz maximum clock speed for high-throughput applications. Evaluate the 128-byte page size against write granularity requirements. Verify voltage levels match the system's 1.8V to 5.5V operating range.

Memory IC Part Context

This part belongs to the 25AA/25LC series of serial EEPROMs from Microchip Technology. It shares architectural similarities with other devices in the family but is distinguished by its 512 Kbit density and specific industrial temperature rating. The SOIC-8 package provides a standard surface-mount form factor suitable for various PCB layouts.

Memory IC Replacement Considerations

Cross-reference with 25LC512 variants for voltage range differences. Verify pinout compatibility with existing designs before substitution. Ensure erase/write cycle endurance meets application longevity requirements.

Memory IC FAQ

Does the 25AA512 require an erase cycle before writing data?

No, the device supports self-timed erase and write cycles where page writes automatically handle necessary internal erasures.

How is the HOLD function utilized?

The HOLD pin suspends serial communication without resetting the sequence, allowing the host to service interrupts while maintaining the current address pointer.