25AA128XT-I/ST

Memory IC Overview

The Microchip Technology 25AA128XT-I/ST is a 128 Kbit Serial Electrically Erasable PROM featuring a 16,384 x 8-bit organization and a 64-byte page size. It interfaces via an SPI-compatible serial bus with a maximum clock frequency of 10 MHz at 5.5V. The device operates within a supply voltage range of 1.8V to 5.5V and supports industrial temperature ranges from -40°C to +85°C. It utilizes low-power CMOS technology with standby current as low as 5 µA.

Memory IC Feature Summary

• Supports block write protection for none, 1/4, 1/2, or all of the memory array
• Includes built-in power-on/off data protection circuitry and a write enable latch
• Features a hold pin to suspend transmission without resetting the serial sequence
• Provides high reliability with over 1,000,000 erase/write cycles and greater than 200 years data retention

Memory IC Applications

• Microcontroller system data storage
• Configuration parameter storage
• Calibration data retention
• Device identification information storage

Memory IC Procurement Notes

Verify the specific suffix 'XT' against official Microchip documentation to confirm package type and temperature grade alignment with the standard 25AA128 series specifications. Ensure compatibility with the required SPI interface timing and voltage levels before integration into the design.

Memory IC Selection Notes

Select this component for applications requiring non-volatile storage accessible via a standard SPI interface. Consider the 1.8V minimum operating voltage for low-power designs. Verify that the 64-byte page write limitation aligns with the application's write algorithm requirements.

Memory IC Part Context

This part belongs to the 25XX128 family of 128 Kbit Serial EEPROMs manufactured by Microchip Technology. The family includes variants such as the 25LC128, which differs primarily in its minimum operating voltage specification. These devices are designed for general-purpose data storage in embedded systems.

Memory IC Replacement Considerations

Public confirmed substitute part numbers include 25AA128T-I/ST.