24LC256T-E/ST

Memory IC Overview

The Microchip 24LC256T-E/ST is a 256-Kbit (32K x 8) serial EEPROM utilizing an I²C-compatible two-wire interface. It operates within a voltage range of 2.5V to 5.5V and supports clock frequencies up to 400 kHz. The device features a 64-byte page write buffer, hardware write protection via the WP pin, and Schmitt trigger inputs for noise suppression. It is housed in an 8-lead TSSOP package and qualified for extended industrial temperature ranges from -40°C to +125°C.

Memory IC Feature Summary

• Supports cascading up to eight devices on a single bus using configurable chip select pins.
• Includes a 64-byte page write buffer to optimize data transfer efficiency.
• Features hardware write protection to prevent unintended memory modifications.
• Incorporates Schmitt trigger inputs and output slope control for signal integrity.

Memory IC Applications

• Data acquisition systems requiring non-volatile storage
• Personal communication devices
• Advanced low-power embedded applications

Memory IC Procurement Notes

Verify that the ordering suffix 'E' confirms the Extended temperature rating (-40°C to +125°C) and 'ST' specifies the TSSOP package. Confirm the 'T' indicates tape-and-reel packaging. Ensure the specific revision matches the required datasheet version DS20001203Y or later for accurate electrical characteristics.

Memory IC Selection Notes

Select this component when a 256-Kbit capacity with I²C compatibility is required. The 2.5V minimum supply voltage distinguishes it from lower-voltage variants like the 24AA256. The TSSOP package is suitable for surface-mount assembly. Verify that the 400 kHz maximum clock speed meets system timing requirements.

Memory IC Part Context

This part belongs to the 24XX256 family, which includes the 24AA256 and 24FC256. While sharing the same memory architecture and interface, the 24LC256 variant is specifically rated for a 2.5V to 5.5V operating range, unlike the 1.7V capable 24AA256. The 'E' suffix denotes extended temperature performance.

Memory IC Replacement Considerations

The 24LC256-I/ST serves as the Industrial temperature grade alternative. Cross-model equivalents include the 24AA256T-E/ST and 24FC256T-E/ST, provided voltage and speed constraints are compatible.