24AA64XT/ST

Memory IC Overview

The Microchip Technology 24AA64XT/ST is a 64-Kbit Electrically Erasable PROM (EEPROM) organized as an 8K x 8-bit memory block. It features a two-wire I2C compatible serial interface 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, with reduced compatibility at lower voltages. 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 available in an 8-lead X-Rotated TSSOP package.

Memory IC Feature Summary

• Low-power CMOS technology enabling operation down to 1.7V with minimal active and standby currents.
• I2C compatible two-wire serial interface supporting standard and high-speed clock modes.
• Hardware write-protect function allowing entire array protection when the WP pin is tied to VCC.
• Schmitt trigger inputs provide enhanced noise suppression and eliminate ground bounce.

Memory IC Applications

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

Memory IC Procurement Notes

Verify that the specific ordering suffix matches the required temperature range and package type. Confirm RoHS compliance status and ensure the selected variant aligns with the system's voltage requirements. Check for any automotive qualification certifications if operating in extended temperature environments. Validate package dimensions against PCB layout specifications before finalizing procurement.

Memory IC Selection Notes

Select this component for designs requiring robust data retention and low power consumption. Ensure the application voltage remains within the specified operational range to maintain clock frequency compatibility. Consider the page write buffer size when designing software protocols to optimize bus throughput. Verify that address pins are correctly hardwired to support multiple device configurations on the same bus.

Memory IC Part Context

This device belongs to the 24XX64 family of serial EEPROMs, which shares architectural similarities with the 24AA64, 24FC64, and 24LC64 series. While these variants differ in minimum operating voltage and maximum clock speed, they utilize identical pinouts and command sets. The 'XT' designation typically indicates specific packaging or testing variations within the broader product line.

Memory IC Replacement Considerations

Direct substitutes include other members of the 24XX64 family such as the 24AA64-I/ST or 24LC64-I/ST, provided voltage and speed requirements are met. Cross-referencing datasheets is essential to confirm pinout compatibility and electrical characteristics. Alternative packages like SOIC or MSOP may be used if mechanical constraints allow.