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MCHPAT24C256C-SSHL-T

Microchip
256 Kbit I2C EEPROM, 1 MHz, 1.7V-5.5V, SOIC-8. Reliable non-volatile storage for settings.
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Overview

AT24C256C-SSHL-T is a 256-Kbit (32-Kbyte) serial EEPROM from Microchip with an I2C-compatible two-wire interface. It operates over a wide supply-voltage range and supports high-speed I2C operation, making it suitable for storing non-volatile configuration and calibration data in embedded systems. The device is offered in an SOIC-8 package for through-hole/SMT friendly PCB assembly.

Why Choose This Part

This part uses a standard I2C interface that is supported by virtually all microcontrollers and single-board computers, simplifying integration. Its wide supply-voltage range increases compatibility across 1.8V to 5V systems and the SOIC-8 package is convenient for prototype and production PCBs. The AT24C256C family is a widely used, well-supported EEPROM option with many reference designs and software examples available.

Applications

Configuration and calibration storage
Keep device settings, calibration coefficients, and user preferences that must persist across power cycles.
Serial number and manufacturing data
Store device identifiers, manufacturing and traceability information accessible to firmware at boot.
Small non-volatile logs and counters
Record usage counters, error logs, or sparse event data where small persistent storage is sufficient.
Bootloader and runtime parameters
Hold boot configuration, firmware flags, or runtime parameters that must survive resets.

Getting Started

Connect the device to your microcontroller or SBC I2C bus with appropriate pull-up resistors and matching supply voltage. On Arduino use the Wire library and on Linux systems use i2c-tools (i2cdetect, i2cget, i2cset) for quick access; remember to respect the device's write boundaries when performing multi-byte writes. Check the datasheet for the device address pins and timing limits before driving the bus at high speed.

Part of 24LCxx / AT24Cxx I2C EEPROM family » AT24C256C

AT24C256C Family

Also available as: AT24C256C

Also Consider

24LC256 MCHPMicrochip Technology - Widely available 256-Kbit I2C EEPROM from the same vendor family.

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Memory & Storage > EEPROM