24LC256-I/ST

Memory IC Overview

The Microchip Technology 24LC256-I/ST is a 32K x 8 (256-Kbit) Serial Electrically Erasable PROM (EEPROM). It operates on a single supply voltage ranging from 2.5V to 5.5V and supports I²C compatible two-wire serial interface with a maximum clock frequency of 400 kHz. The device features a 64-byte page write buffer, hardware write-protect capability, and Schmitt trigger inputs for noise suppression. It provides over 1 million erase/write cycles and data retention exceeding 200 years. The component is housed in an 8-lead TSSOP package and is rated for industrial temperature operation from -40°C to +85°C.

Memory IC Feature Summary

• Supports cascading up to eight devices on the same bus using functional address lines A0, A1, and A2.
• Includes hardware write-protect functionality via the WP pin to inhibit write operations when tied to VCC.
• Features output slope control to eliminate ground bounce and Schmitt trigger inputs for improved noise spike suppression.

Memory IC Applications

• Personal communications systems requiring low-power non-volatile storage
• Data acquisition applications needing reliable parameter retention
• Industrial control systems operating within standard voltage ranges

Memory IC Procurement Notes

Verify that the ordering suffix matches the required package type and temperature grade. Confirm the specific voltage range requirements align with the 2.5V minimum specification for the LC variant. Ensure compatibility with existing PCB footprints for the 8-TSSOP configuration before finalizing procurement orders.

Memory IC Selection Notes

Select this part for designs requiring I²C connectivity with moderate speed requirements up to 400 kHz. It is suitable for applications where power consumption must be minimized during standby modes. Consider alternative variants if lower voltage operation below 2.5V or higher clock speeds are necessary for the system architecture.

Memory IC Part Context

This component belongs to the 24XX256 family of serial EEPROMs manufactured by Microchip Technology. It shares architectural similarities with the 24AA256 and 24FC256 models but differs in operational voltage specifications and maximum clock frequencies. The family utilizes a common pinout and command set across various package options including SOIC, MSOP, and PDIP.

Memory IC Replacement Considerations

Public confirmed substitute part numbers include 24LC256T-I/ST for tape and reel packaging variations.