25AA320-I/SN

Memory IC Overview

The Microchip Technology 25AA320-I/SN is a 32 Kbit (4096 x 8) serial Electrically Erasable PROM. It features an SPI-compatible interface with a maximum clock frequency of 1 MHz and operates within a supply voltage range of 1.8V to 5.5V. The device supports industrial temperature ranges from -40°C to +85°C and utilizes an 8-pin 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 write enable latch to prevent inadvertent writes.
• Features a hold pin that allows suspension of serial communication without resetting the sequence.

Memory IC Applications

• Data storage in microcontroller systems
• Configuration memory for embedded devices
• Parameter storage in industrial control units

Memory IC Procurement Notes

Verify the specific suffix 'I/SN' corresponds to the Industrial temperature grade (-40°C to +85°C) and the 8-SOIC package type. Confirm compatibility with the host system's SPI voltage levels, as the device supports a wide range from 1.8V to 5.5V. Ensure the design accounts for the recommended replacement part numbers if sourcing this legacy component.

Memory IC Selection Notes

Select this component for applications requiring non-volatile storage with simple serial interface connectivity. Consider the 25AA320A series for new designs, as the 25AA320 is not recommended for new implementations. Evaluate endurance requirements against the specified 1 million E/W cycles and ensure adequate decoupling for the specified current consumption profiles.

Memory IC Part Context

This device belongs to the 25XX320 family of 32 Kbit serial EEPROMs manufactured by Microchip Technology. It shares architectural similarities with the 25LC320 and 25C320 variants, differing primarily in operating voltage ranges and maximum clock frequencies. The 25AA320 specifically targets low-voltage industrial applications.

Memory IC Replacement Considerations

Microchip recommends using the 25AA320A or 25LC320A for new designs instead of the 25AA320. These newer variants offer updated specifications while maintaining functional compatibility.