24AA64X-I/ST

Memory IC Overview

The Microchip Technology 24AA64X-I/ST is a 64-Kbit Electrically Erasable PROM (EEPROM) organized as an 8K x 8-bit memory block. It operates on a single supply voltage ranging from 1.7V to 5.5V with a maximum clock frequency of 400 kHz. The device features low-power CMOS technology, drawing a maximum active current of 3 mA and a standby current of 1 µA. It utilizes a two-wire serial interface compatible with I2C protocols.

Memory IC Feature Summary

• Supports cascading up to eight devices on the same bus using functional address pins for expanded addressing.
• Includes Schmitt trigger inputs and output slope control to suppress noise and eliminate ground bounce.
• Features hardware write-protect capability via the WP pin to secure data integrity.
• Provides a 32-byte page write buffer to optimize data transfer efficiency.

Memory IC Applications

• Personal communication systems requiring non-volatile storage
• Data acquisition modules needing reliable parameter retention
• Industrial control units utilizing I2C-based architectures

Memory IC Procurement Notes

Verify the specific suffix against official datasheets to confirm package type and temperature grade. Confirm RoHS compliance status and AEC-Q100 automotive qualification requirements if applicable to your design. Ensure ordering specifications match the exact voltage and interface needs.

Memory IC Selection Notes

Select this component for applications requiring low-voltage operation down to 1.7V and high endurance cycles. Consider the TSSOP package for surface mount implementations. Evaluate the need for hardware write protection and multi-device bus expansion capabilities during system architecture planning.

Memory IC Part Context

This EEPROM belongs to the 24XX64 family, which includes variants like 24FC64 and 24LC64. While sharing core functionality, differences exist in maximum clock speeds and minimum operating voltages across the series. The 24AA64 variant specifically supports operation down to 1.7V with a 400 kHz limit.

Memory IC Replacement Considerations

Compatible substitutes within the same family include the 24LC64 and 24FC64. Verify that voltage ranges and clock frequencies of potential replacements align with the original design constraints before substitution.

Memory IC FAQ

How does the hardware write-protect feature function?

The WP pin allows users to write-protect the entire array when tied to VCC. Read operations remain unaffected regardless of the WP pin state.

What is the maximum number of devices supported on a single bus?

Up to eight devices can be connected to the same bus by utilizing different combinations of the A0, A1, and A2 chip select bits.