24FC256-I/ST

Memory IC Overview

The Microchip Technology 24FC256-I/ST is a 32K x 8 (256 Kbit) Serial Electrically Erasable PROM (EEPROM). It operates across a broad voltage range of 1.7V to 5.5V and supports a maximum clock frequency of 1 MHz at VCC ≥ 2.5V, with 400 kHz operation at lower voltages. The device utilizes a Two-Wire Serial Interface compatible with I²C protocols. It features hardware write protection via the WP pin, Schmitt trigger inputs for noise suppression, and output slope control to eliminate ground bounce. The component is housed in an 8-lead TSSOP package and is rated for industrial temperature ranges from -40°C to +85°C.

Memory IC Feature Summary

• Supports high-speed serial data transmission up to 1 MHz under specified voltage conditions
• Includes a 64-byte page write buffer to optimize write operations
• Features hardware write protection controlled by the WP pin state
• Incorporates Schmitt trigger inputs on SDA and SCL lines for enhanced noise immunity

Memory IC Applications

• Personal communications devices requiring non-volatile data storage
• Data acquisition systems needing reliable parameter retention
• Embedded controllers managing configuration settings

Memory IC Procurement Notes

Verify that the specific ordering suffix matches the required package type and temperature grade. Confirm the voltage operating range aligns with the system design, as performance varies below 2.5V. Ensure the supply chain source provides authentic Microchip Technology components to guarantee reliability and compliance with RoHS standards.

Memory IC Selection Notes

Select this component when high-speed I²C communication is required alongside low-power consumption. The 24FC256 offers faster clock rates compared to standard variants but maintains compatibility with existing I²C bus architectures. Consider the TSSOP package for surface-mount applications where space efficiency is critical.

Memory IC Part Context

This part belongs to the 24XX256 family of 256-Kbit Serial EEPROMs manufactured by Microchip Technology. The family includes variants like the 24AA256 and 24LC256, which differ primarily in maximum clock frequency and minimum operating voltage specifications while sharing similar interface and memory organization characteristics.

Memory IC Replacement Considerations

Direct functional substitutes within the same family include the 24FC256-I/SN (SOIC package) or 24FC256-I/SM (SOIJ package). For different speed grades, the 24LC256 series may be considered if lower clock speeds are acceptable.