24AA64-I/ST

Memory IC Overview

The Microchip Technology 24AA64-I/ST is a 64-Kbit Electrically Erasable PROM organized as an 8K x 8-bit memory block. It operates on a single supply voltage ranging from 1.7V to 5.5V and supports I2C compatible two-wire serial communication with clock frequencies up to 400 kHz. The device features low-power CMOS technology, drawing a maximum of 3 mA during active operation and 1 µA in standby mode. It includes a 32-byte page write buffer, hardware write-protect capability via the WP pin, and Schmitt trigger inputs for noise suppression. The component is rated for industrial temperature ranges from -40°C to +85°C.

Memory IC Feature Summary

• Supports cascading up to eight devices on the same bus using three functional address pins.
• Includes hardware write protection that inhibits array writes when the WP pin is tied high.
• Features output slope control designed to eliminate ground bounce effects.

Memory IC Applications

• Personal communications systems requiring non-volatile data storage
• Data acquisition applications needing low-power retention
• Industrial control systems utilizing I2C bus architectures

Memory IC Procurement Notes

Verify the specific suffix 'I/ST' corresponds to the Industrial temperature range (-40°C to +85°C) and TSSOP-8 package type. Confirm the datasheet revision matches the required electrical characteristics, particularly regarding VCC operating limits and clock frequency specifications. Ensure compatibility with host controller I2C pull-up resistor requirements.

Memory IC Selection Notes

Select this component for designs requiring low-voltage operation down to 1.7V. Consider the 32-byte page write buffer for efficient data throughput compared to byte-write-only alternatives. Verify that the TSSOP-8 package fits the PCB layout constraints and that the I2C interface speed requirements do not exceed 400 kHz.

Memory IC Part Context

This part belongs to the 24XX64 family of 64-Kbit I2C Serial EEPROMs manufactured by Microchip Technology. It shares architectural similarities with the 24FC64 and 24LC64 variants, differing primarily in voltage thresholds and clock speeds. The 'AA' designation indicates support for operation down to 1.7V, distinguishing it from the 2.5V minimum requirement of the 'LC' series.

Memory IC Replacement Considerations

Public confirmed substitute part numbers include 24AA64T-I/ST and 24AA64FT-I/ST.