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Datasheet
CAT24C256WI-GT3 – 256Kbit I2C EEPROM Memory IC | 1MHz SOIC-8 Package
The CAT24C256WI-GT3 from onsemi is a high-performance 256Kbit (32,768×8-bit) serial EEPROM designed for applications requiring dependable non-volatile data storage and high-speed communication. Utilizing the I2C serial interface, it supports Standard (100 kHz), Fast (400 kHz), and Fast-Plus (1 MHz) bus modes for flexible system integration. Operating over a wide voltage range of 1.8 V to 5.5 V, this device ensures low-power operation suitable for battery-powered and embedded applications. The CAT24C256 incorporates a 64-byte page write buffer for efficient data handling, hardware write protection for full memory security, and on-chip ECC (Error Correction Code) for enhanced data integritymaking it ideal for high-reliability industrial, automotive, and consumer systems.
Key Features

I2C Interface: Supports Standard (100 kHz), Fast (400 kHz), and Fast-Plus (1 MHz) I2C protocols.
Memory Organization: 256 Kbit (32,768×8-bit) architecture for large data capacity.
Page Write Buffer: 64-byte page write buffer for fast and efficient data updates.
Operating Voltage: 1.8 V to 5.5 V single-supply range for low-power applications.
Hardware Write Protection: WP pin allows full memory protection against unintentional writes.
On-Chip ECC: Integrated Error Correction Code ensures data reliability and high endurance.

High Endurance & Retention:

1,000,000 program/erase cycles per byte

100-year data retention

Bus Features: Schmitt triggers and noise suppression filters on SCL and SDA inputs for signal stability.
Device Addressing: Up to eight devices can be connected on a single I2C bus via external address pins.
Package Options: Available in SOIC-8, TSSOP-8, and UDFN-8 packages.
Environmental Compliance: Pb-free, halogen-free, BFR-free, and RoHS compliant.