24AA256T-E/MS

Memory IC Overview

The Microchip Technology 24AA256T-E/MS is a 256-Kbit (32K x 8) serial EEPROM featuring an I²C-compatible two-wire interface. It operates on a single supply voltage ranging from 1.7V to 5.5V and supports clock frequencies up to 400 kHz at voltages of 2.5V or higher, with a maximum access time of 900 ns. The device utilizes an 8-lead MSOP surface-mount package and includes hardware write protection via the WP pin. It offers over one million erase/write cycles, data retention exceeding 200 years, and functions within an extended temperature range of -40°C to +125°C.

Memory IC Feature Summary

• Supports cascading up to eight devices on the same bus for expanded address space
• Includes Schmitt trigger inputs and output slope control for noise suppression and ground bounce elimination
• Features a 64-byte page write buffer to optimize write throughput
• Provides hardware write protection through the dedicated WP pin

Memory IC Applications

• Personal communications systems requiring non-volatile data storage
• Data acquisition applications needing low-power memory solutions
• Industrial control systems operating in extended temperature environments

Memory IC Procurement Notes

Verify that the ordering suffix 'E' confirms the Extended temperature range (-40°C to +125°C) and the 'MS' suffix specifies the 8-lead MSOP package. Confirm the 'T' indicates tape-and-reel packaging if bulk handling is required. Ensure the specific revision matches the datasheet DS20001203Y for accurate electrical characteristics.

Memory IC Selection Notes

Select this component when operation below 2.5V is required, as it supports voltages down to 1.7V unlike the 24LC256 variant. Choose the MSOP package for compact surface-mount designs where only two devices can share a bus due to unconnected A0 and A1 pins. Verify that the 400 kHz clock speed meets system timing requirements at the target operating voltage.

Memory IC Part Context

This part belongs to the 24AA256 family of 256-Kbit serial EEPROMs manufactured by Microchip Technology. It shares functional similarities with the 24LC256 and 24FC256 but differs in minimum operating voltage and maximum clock frequency specifications. The device is designed for advanced low-power applications utilizing standard I²C communication protocols.

Memory IC Replacement Considerations

The 24LC256T-E/MS serves as a direct physical replacement but requires a minimum supply voltage of 2.5V. The 24FC256T-E/MS offers higher clock speeds but may have different timing constraints at lower voltages. Verify package compatibility and voltage levels before substitution.