24AA256-E/MS

Memory IC Overview

The Microchip Technology 24AA256-E/MS is a 256-Kbit (32K x 8) serial electrically erasable PROM featuring an I²C-compatible two-wire interface. It operates across a supply voltage range of 1.7V to 5.5V and supports clock frequencies up to 400 kHz, with 100 kHz operation below 2.5V. The device utilizes low-power CMOS technology, offering a maximum write current of 3 mA and standby current as low as 1 µA. It provides hardware write protection via the WP pin, includes Schmitt trigger inputs for noise suppression, and ensures data retention exceeding 200 years with over one million erase/write cycles.

Memory IC Feature Summary

• Supports cascading up to eight devices on the same bus using functional address lines A0, A1, and A2.
• Includes a 64-byte page write buffer to facilitate efficient sequential data storage operations.
• Features hardware write protection controlled by the WP pin to prevent unintended array modifications.
• Incorporates output slope control mechanisms designed to eliminate ground bounce during switching.

Memory IC Applications

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

Memory IC Procurement Notes

Verify that the ordering suffix matches the required temperature grade and package type. Confirm the specific revision level against the manufacturer's datasheet to ensure compatibility with existing designs. Check for RoHS compliance status if environmental regulations apply to the target assembly process.

Memory IC Selection Notes

Select this component when a broad voltage range starting at 1.7V is necessary for low-power applications. Choose the MSOP package for surface-mount designs requiring compact footprints. Ensure the system design accommodates the specific addressing limitations where only two devices can share a bus due to unconnected A0 and A1 pins.

Memory IC Part Context

This part belongs to the 24XX256 family of serial EEPROMs manufactured by Microchip Technology. It shares architectural similarities with the 24LC256 and 24FC256 but differs in minimum operating voltage and maximum clock frequency specifications. The extended temperature grade (-40°C to +125°C) distinguishes it from industrial grade variants within the same memory density class.

Memory IC Replacement Considerations

Direct substitutes include other 24AA256 variants with different packages such as SOIC or PDIP, provided the electrical characteristics remain identical. Cross-referencing with 24LC256 requires verifying the higher minimum voltage requirement of 2.5V does not conflict with the system power rails.