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24AA256

MCHP24AA256

Microchip Technology
I2C 256-Kbit EEPROM variant if an I2C interface is preferred
Active4,369 in stock
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Overview

The Microchip 24AA256 is a 256-Kbit (32KB) I2C serial EEPROM. It provides reliable non-volatile data storage with a standard two-wire interface, making it suitable for a wide range of embedded applications. This EEPROM supports a supply voltage range from 1.7V to 5.5V and features a 400 kHz clock frequency.

Why Choose This Part

This EEPROM offers high endurance with more than one million erase/write cycles and robust data retention exceeding 200 years. Its wide operating voltage range (1.7V to 5.5V) provides flexibility for various power supply designs. Features like hardware write-protect and Schmitt Trigger inputs enhance system reliability and data integrity.

Applications

Configuration Storage
Storing system configuration parameters that need to persist across power cycles in embedded devices.
Data Logging
Recording sensor data or event logs in applications where a small amount of non-volatile storage is required.
Calibration Data
Saving calibration coefficients for sensors or analog front-ends in industrial or consumer products.
User Settings
Storing user-definable settings in devices that require retained preferences.
Firmware Updates
Providing a small, reliable memory for bootloader parameters or checksums during firmware update processes.

Key Specifications

Technology EEPROM
Access Time 900 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 400 kHz
Memory Interface I2C
Voltage - Supply 1.7V ~ 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 get started with the 24AA256, integrate it into your design using its I2C interface. Most microcontrollers have built-in I2C peripherals and readily available library support. You will need to implement I2C read and write functions according to the device datasheet, handling start/stop conditions, addressing, and data transfer protocols.

Also Consider

24LC256 MCHPMicrochip Technology - This is a similar 256-Kbit I2C EEPROM from Microchip, often a drop-in alternative for industrial temperature ranges.
AT24C256C MCHPMicrochip Technology - An alternative 256-Kbit I2C EEPROM with similar specifications and available in various packages from the same manufacturer.
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