25AA020A-I/SN

Memory IC Overview

The Microchip Technology 25AA020A-I/SN is a 2 Kbit Serial Electrically Erasable Programmable Read-Only Memory (EEPROM) housed in an 8-lead SOIC package. It features a 256 x 8-bit organization and communicates via a standard SPI-compatible serial bus 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 conditions from -40°C to +85°C.

Memory IC Feature Summary

• Supports write page mode for up to 16 bytes and sequential read operations
• Includes built-in hardware write protection via the WP pin and software block protection
• Features power-on/off data protection circuitry and a write enable latch

Memory IC Applications

• Storing device unique identification numbers
• Recording production batch information
• Saving operational configuration parameters
• Maintaining simple fault logs or running history

Memory IC Procurement Notes

Verify that the ordering suffix matches the required specifications, specifically confirming the 'I' designation for the industrial temperature range and 'SN' for the SOIC package type. Ensure the component meets RoHS compliance requirements for your manufacturing process. Cross-reference the datasheet revision to confirm compatibility with your system design constraints before finalizing procurement.

Memory IC Selection Notes

Select this component when a low-pin-count non-volatile memory solution is required for small data storage tasks. It is suitable for systems utilizing microcontrollers with built-in SPI ports or those capable of bit-banging the protocol. Consider this part for applications needing robust data retention and high endurance without complex interface requirements.

Memory IC Part Context

This EEPROM belongs to the 25XX020A family, which shares identical core memory arrays and instruction sets. The primary distinction between the 25AA020A and its counterpart, the 25LC020A, lies in the operating voltage range. The 25AA020A supports lower voltages starting at 1.8 V, making it appropriate for modern low-power embedded designs.

Memory IC Replacement Considerations

The 25LC020A serves as a functional substitute within the same family, sharing the same pinout and command set. However, the 25LC020A requires a minimum supply voltage of 2.5 V, whereas the 25AA020A supports operation down to 1.8 V. Verify voltage headroom in the target application before substituting.