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24AA256-I/SN

MCHP24AA256-I/SN

Microchip
Same 256-Kbit EEPROM in a SOIC package for surface-mount applications.
NRND13,265 in stock
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Overview

The 24AA256-I/SN is a 256-Kbit I2C serial EEPROM designed for low-power applications with a wide operating voltage range from 1.7V to 5.5V. It features a 64-byte page write buffer and is cascadable for up to eight devices on a single bus, providing a total of 2Mb of addressable memory.

Why Choose This Part

This EEPROM offers high reliability with over one million erase/write cycles and more than 200 years of data retention. It includes Schmitt Trigger inputs for noise suppression and output slope control to minimize ground bounce, making it ideal for electrically noisy environments.

Applications

Parameter Storage
Retaining calibration constants and user configuration settings in industrial and automotive instruments.
Data Logging
Storing periodic sensor readings in battery-powered remote monitoring devices due to its 1uA standby current.
ID and Serialization
Storing MAC addresses or unique serial numbers for networked hardware identification.

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 interface with the 24AA256-I/SN, connect the SCL and SDA lines to a microcontroller's I2C master with 4.7k-10k ohm pull-up resistors. Ensure the three hardware address pins (A0, A1, A2) are tied to VCC or GND to set the unique bus address. Many standard I2C libraries for Arduino, PIC, and STM32 support this device using its 7-bit control code of 1010.

Also Consider

24LC256-I/SN MCHPMicrochip - Choose this version if your system requires a 2.5V minimum supply but needs higher clock frequencies at lower voltages than the AA series.
AT24C256C-SSHL-T MCHPMicrochip - A direct functional alternative with similar memory density and I2C performance in an 8-lead SOIC package.
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