25AA040-I/SN

Memory IC Overview

The Microchip Technology 25AA040-I/SN is a 4 Kbit (512 x 8) serial Electrically Erasable PROM featuring SPI-compatible interface. It operates within a voltage range of 1.8V to 5.5V and supports an industrial temperature range of -40°C to +85°C. The device utilizes an 8-pin SOIC package and offers high reliability with over 1 million write/erase cycles and data retention exceeding 200 years.

Memory IC Feature Summary

• Low-power CMOS technology with typical standby current of 500 nA
• Hardware write protection via dedicated WP pin and software block protection
• Self-timed erase and write cycles with internal write cycle time of 5 ms max
• Communication pause capability via HOLD pin without sequence reset

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 'I/SN' corresponds to Industrial temperature range (-40°C to +85°C) and 8-lead SOIC packaging. Confirm that the datasheet DS21204E indicates this family is not recommended for new designs, suggesting evaluation of successor parts like the 25AA040A series for long-term supply assurance.

Memory IC Selection Notes

Select this component when a low-voltage SPI EEPROM is required for industrial environments. Ensure the design accommodates the 1 MHz maximum clock frequency at lower voltages. Verify that the 16-byte page write limitation aligns with application write patterns to optimize performance.

Memory IC Part Context

This part belongs to the 25XX040 family, which includes variants like 25LC040 and 25C040 differing primarily in operating voltage ranges. The 25AA040 specifically supports the widest voltage range starting from 1.8V, making it suitable for low-power applications compared to the 2.5V or 5.0V variants.

Memory IC Replacement Considerations

Datasheet explicitly recommends using 25AA040A or 25LC040A instead of this device for new designs.