25AA020A-I/P

Memory IC Overview

The Microchip Technology 25AA020A-I/P is a 2 Kbit (256 x 8-bit) Serial Electrically Erasable Programmable Read-Only Memory (EEPROM). It operates within a supply voltage range of 1.8V to 5.5V and supports a maximum clock frequency of 10 MHz via a standard SPI-compatible serial bus. The device features industrial temperature ratings from -40°C to +85°C and utilizes an 8-lead PDIP package.

Memory IC Feature Summary

• Supports write page mode for up to 16 bytes per cycle
• Includes hardware write protection via dedicated pin
• Features built-in power-on/off data protection circuitry
• Allows serial communication pausing through hold input

Memory IC Applications

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

Memory IC Procurement Notes

Verify the specific suffix 'I' confirms the industrial temperature grade (-40°C to +85°C) and 'P' indicates the PDIP package type. Confirm RoHS compliance status as required by project specifications. Ensure the selected variant matches the required voltage range, as other suffixes may indicate different electrical characteristics or packaging options.

Memory IC Selection Notes

Select this component when low-power consumption and high reliability are critical for non-volatile data storage. The wide voltage range accommodates various logic levels without external level shifting. Consider the page write capability for efficient data updates and the robust block protection features for securing sensitive information against accidental modification.

Memory IC Part Context

This EEPROM belongs to the 25XX020A family, which shares identical functional architectures but differs in operating voltage ranges. The 25LC020A variant requires a minimum voltage of 2.5V, whereas the 25AA020A supports operation down to 1.8V. Both variants utilize the same instruction set and pin configurations for seamless integration into existing designs.

Memory IC Replacement Considerations

Direct substitutes include the 25LC020A-I/P, provided the application voltage does not drop below 2.5V. Other family members like the 25AA040 offer higher capacity with similar interfaces. Verify that any replacement maintains the same PDIP-8 footprint and SPI compatibility.