25AA020A-I/MS

Memory IC Overview

The Microchip Technology 25AA020A-I/MS is a 2 Kbit (256 x 8-bit) Serial Electrically Erasable Programmable Read-Only Memory (EEPROM). It interfaces via a standard SPI-compatible serial bus with a maximum clock frequency of 10 MHz. The device operates on a supply voltage range of 1.8V to 5.5V and supports industrial temperature ranges from -40°C to +85°C. It features low-power CMOS technology, self-timed erase and write cycles, and block write protection capabilities.

Memory IC Feature Summary

• Supports high-speed SPI communication with up to 10 MHz clock frequency
• Includes hardware write protection via the WP pin and software-based block protection
• Features a hold function to pause serial transmission without resetting the sequence
• Provides non-volatile data retention exceeding 200 years

Memory IC Applications

• Storing unique device identification numbers
• Recording production batch information
• Saving minimal operational logs or configuration parameters

Memory IC Procurement Notes

Verify that the specific suffix 'I' confirms the Industrial temperature grade (-40°C to +85°C) and 'MS' denotes the 8-lead MSOP package. Ensure the source documentation explicitly lists the 25AA020A variant rather than the 25LC020A, as they differ in minimum operating voltage requirements. Confirm RoHS compliance status through official manufacturer declarations.

Memory IC Selection Notes

Select this component when an application requires a small, non-volatile storage space accessible via SPI. It is suitable for systems needing reliable storage for calibration data or settings. Consider the 1.8V lower voltage limit compared to other variants if operating at low power supplies. Verify that the 16-byte page write size aligns with the application's data update patterns.

Memory IC Part Context

This part belongs to the 25XX020A family of 2 Kbit serial EEPROMs manufactured by Microchip Technology. It shares the same memory array and instruction set with the 25LC020A, differing primarily in the supported supply voltage range. The device is designed for direct interfacing with microcontrollers possessing built-in SPI ports.

Memory IC Replacement Considerations

The 25LC020A serves as a functional substitute within the same package, though it requires a higher minimum supply voltage of 2.5V. Other capacity levels within the 25AA series may require interface adjustments due to different addressing schemes.