EmbeddedRelated.com
The 2026 Embedded Online Conference
    Parts    24AA256-I/P
24AA256-I/P

MCHP24AA256-I/P

Microchip Technology
EEPROM Memory IC 256Kbit I2C 400 kHz 900 ns 8-PDIP
Active669 in stock
Datasheet Digi-Key Mouser Compare Prices

Overview

The Microchip 24AA256-I/P is a 256Kbit (32KB) serial EEPROM memory IC featuring an I2C interface. It operates from a supply voltage range of 1.7V to 5.5V and supports a clock frequency of up to 400 kHz. This non-volatile memory solution is designed for through-hole mounting in an 8-PDIP package.

Why Choose This Part

This EEPROM offers reliable non-volatile storage with its self-timed erase/write cycle and robust ESD protection. Its I2C interface is widely supported, allowing for easy integration into existing microcontroller designs. The wide operating voltage range from 1.7V to 5.5V makes it suitable for various power supply environments.

Applications

Data Logging
Storing configuration settings and periodically logged sensor data in embedded systems that require non-volatile storage.
System Configuration Storage
Saving crucial system parameters, calibration data, or user preferences that must persist across power cycles.
Firmware Updates
Providing a reliable storage area for small firmware segments or bootloader configuration in microcontrollers.
Product Personalization
Storing unique serial numbers, MAC addresses, or other identification data for individual products.
Small Message Buffering
Acting as a buffer for small amounts of critical data that needs to be written reliably and retained if power is lost.

Key Specifications

Technology EEPROM
Access Time 900 ns
Memory Size 256Kbit
Memory Type Non-Volatile
Memory Format EEPROM
Mounting Type Through Hole
Package / Case 8-DIP (0.300", 7.62mm)
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-PDIP
Write Cycle Time - Word, Page 5ms

Getting Started

Integrating this EEPROM involves connecting its SDA, SCL, VCC, and GND pins to a microcontroller's I2C bus. Most microcontroller development environments include I2C master libraries that simplify reading and writing operations. Refer to the device datasheet for I2C address selection and write-protect pin usage.

Also Consider

24LC256-I/P MCHPMicrochip Technology - This is a similar 256Kbit I2C EEPROM from Microchip that offers a slightly different voltage range or temperature grade, making it a good alternative for specific environmental requirements.
The 2026 Embedded Online Conference