25AA040AT-I/MS

Memory IC Overview

The Microchip Technology 25AA040AT-I/MS is a 4 Kbit (512 x 8-bit) Serial Electrically Erasable Programmable Read-Only Memory (EEPROM). It features an SPI-compatible serial bus interface 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 utilizes low-power CMOS technology, offering high endurance of 1,000,000 erase/write cycles and data retention exceeding 200 years.

Memory IC Feature Summary

• Supports page write mode allowing up to 16 bytes per cycle
• Includes block write protection for none, 1/4, 1/2, or all array segments
• Features built-in power-on/off data protection circuitry
• Provides hold functionality to pause communication without resetting the sequence

Memory IC Applications

• Microcontroller system configuration storage
• Calibration data retention in embedded systems
• Parameter logging for industrial sensors
• Device identification and security code storage

Memory IC Procurement Notes

Verify that the ordering suffix 'I' corresponds to the Industrial temperature grade (-40°C to +85°C) and 'MS' indicates the MSOP-8 package. Confirm the 'T' suffix denotes tape and reel packaging. Ensure the specific part number matches the required voltage range and interface specifications before procurement.

Memory IC Selection Notes

Select this component when a small, non-volatile memory solution is needed for storing calibration data or user settings. It is suitable for applications requiring frequent updates due to its high endurance rating. Consider the MSOP-8 package size constraints and the need for an SPI interface compatible host controller.

Memory IC Part Context

This EEPROM belongs to the 25XX040A family, which includes variants like the 25LC040A. The 25AA series specifically supports lower voltage operation starting at 1.8 V, whereas other family members may require higher minimum voltages. All variants share similar pinouts and instruction sets but differ in electrical characteristics and temperature grades.

Memory IC Replacement Considerations

Compatible substitutes include the 25AA040A-I/MS and 25LC040A-I/MS. Verify that replacement parts match the exact voltage range, temperature grade, and package dimensions. Ensure the substitute maintains the same SPI protocol compatibility and pinout configuration.