24AA64T-I/ST

Memory IC Overview

The Microchip Technology 24AA64T-I/ST is a 64-Kbit Electrically Erasable PROM organized as an 8K x 8-bit memory block. It features a two-wire serial interface compatible with I2C protocols and operates on a single supply voltage ranging from 1.7V to 5.5V. The device supports clock frequencies up to 400 kHz at voltages of 2.5V or higher, and 100 kHz below that threshold. It includes Schmitt trigger inputs for noise suppression, hardware write protection, and a 32-byte page write buffer. The component is housed in an 8-lead TSSOP package and is rated for industrial temperature operation between -40°C and +85°C.

Memory IC Feature Summary

• Low-power CMOS technology enabling standby currents as low as 1 µA
• Hardware write-protect capability via the WP pin to secure data integrity
• Supports cascading up to eight devices on a single bus using address pins A0, A1, and A2
• Includes output slope control to eliminate ground bounce during switching

Memory IC Applications

• Personal communications equipment requiring non-volatile storage
• Data acquisition systems needing reliable parameter retention
• Industrial control units operating within specified temperature ranges
• Embedded systems utilizing I2C-compatible microcontrollers

Memory IC Procurement Notes

Verify the specific suffix 'T' indicates tape-and-reel packaging when sourcing components. Confirm the 'I' designation matches the required industrial temperature range of -40°C to +85°C for your application environment. Ensure the host system voltage aligns with the 1.7V to 5.5V operational window. Check for RoHS compliance status if environmental regulations apply to your manufacturing process.

Memory IC Selection Notes

Select this part for applications requiring low-voltage operation down to 1.7V and high endurance exceeding one million erase/write cycles. Consider the 32-byte page write buffer for efficient data handling compared to byte-write-only alternatives. Verify that the TSSOP package fits your PCB layout constraints. Ensure the design accommodates the necessary pull-up resistors for the SDA and SCL lines based on the target clock frequency.

Memory IC Part Context

This component belongs to the 24XX64 family of 64-Kbit I2C Serial EEPROMs manufactured by Microchip Technology. The family includes variants such as the 24LC64 and 24FC64, which differ primarily in minimum operating voltage and maximum clock speed. The 24AA64 variant specifically supports operation down to 1.7V with a maximum clock frequency of 400 kHz.

Memory IC Replacement Considerations

Direct functional substitutes within the same package include other 24AA64 variants with different suffixes for package type or temperature grade, such as 24AA64-I/SN or 24AA64-I/MS. Cross-family replacements like the 24LC64 require verification of voltage compatibility, as the 24LC64 has a higher minimum operating voltage.