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CAT24C256WI-GT3

ONCAT24C256WI-GT3

onsemi
EEPROM Memory IC 256Kbit I2C 1 MHz 500 ns 8-SOIC
Active45,840 in stock
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Overview

The CAT24C256WI-GT3 is a 256Kbit non-volatile CMOS EEPROM organized as 32,768 words of 8 bits each. It operates on a wide supply voltage range from 1.8V to 5.5V and supports the standard I2C serial interface protocol at clock frequencies up to 1 MHz. This memory IC is designed for low-power applications, featuring a 1uA standby current and a 64-byte page write buffer.

Why Choose This Part

The device offers extremely low power consumption with a 1mA read and 3mA write current, making it ideal for energy-sensitive designs. It features a 1 MHz Fast-Mode Plus I2C interface for high-speed data transfers and is housed in a standard 8-pin SOIC package for easy integration. The 1.8V to 5.5V operating range ensures compatibility with both legacy 5V systems and modern low-voltage logic.

Applications

Configuration Storage
Storing calibration data, user preferences, and network settings in industrial and consumer devices.
Firmware Versioning
Retaining bootloader parameters and firmware metadata for system microcontrollers.
Event Logging
Recording error logs and operational telemetry in battery-powered sensors and portable equipment.

Key Specifications

Technology EEPROM
Access Time 500 ns
Memory Size 256Kbit
Memory Type Non-Volatile
Memory Format EEPROM
Mounting Type Surface Mount
Package / Case 8-SOIC (0.154", 3.90mm Width)
Clock Frequency 1 MHz
Memory Interface I2C
Voltage - Supply 1.8V ~ 5.5V
Memory Organization 32K x 8
Operating Temperature -40degC ~ 85degC (TA)
Supplier Device Package 8-SOIC
Write Cycle Time - Word, Page 5ms

Getting Started

To interface with this EEPROM, connect the SDA and SCL lines to your MCU with appropriate pull-up resistors and configure your I2C peripheral for 100 kHz, 400 kHz, or 1 MHz operation. Ensure the WP (Write Protect) pin is tied to ground for write operations or to VCC to protect data. Standard I2C libraries such as the Arduino Wire library or STM32 HAL are fully compatible with this device.

Also Consider

24LC256-I/SN MCHPMicrochip Technology - A widely used alternative with similar 256Kbit density and 8-SOIC footprint, though limited to 400 kHz at lower voltages.
AT24C256C-SSHL-T MCHPMicrochip Technology - Offers comparable 1 MHz performance at 2.5V-5.5V and includes a hardware write-protect pin.
M24256-BRMN6P STMicroelectronics - Provides 256Kbit I2C storage with high reliability and wide voltage support in a compatible 8-SOIC package.

Categories

Memory & Storage > EEPROM