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24FC256-I/SN

MCHP24FC256-I/SN

Microchip Technology
EEPROM Memory IC 256Kbit I2C 1 MHz 400 ns 8-SOIC
NRND1,045 in stock
Datasheet Digi-Key Mouser Compare Prices

Overview

The 24FC256-I/SN is a 256Kbit (32KB) non-volatile EEPROM utilizing a high-speed 1 MHz I2C serial interface. It supports a wide operating voltage range from 1.7V to 5.5V and features a 64-byte page write buffer to optimize data throughput. This CMOS memory IC is designed for low-power operation with a standby current of only 1 microamp.

Why Choose This Part

The device features Schmitt trigger inputs for noise suppression and output slope control to eliminate ground bounce, ensuring reliable communication in noisy environments. It offers exceptional durability with more than one million erase/write cycles and over 200 years of data retention. The AEC-Q100 qualification makes it suitable for rigorous automotive and industrial grade reliability standards.

Applications

Configuration Storage
Ideal for storing user settings and system calibration parameters that must persist through power cycles.
Data Logging
Suitable for recording sensor data over time in low-power industrial or automotive environments.
Bootloader Parameters
Commonly used to store firmware update flags, checksums, and application metadata for microcontrollers.
Asset Tracking
Maintains unique identification and usage history in portable devices requiring long-term data retention.

Key Specifications

Technology EEPROM
Access Time 400 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 1.7V ~ 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

Connect the SCL and SDA pins to your microcontroller's I2C bus with external pull-up resistors, typically 2.2k ohms for 1 MHz operation. Use the three address pins (A0, A1, A2) to hardware-address up to eight devices on a single bus. Ensure the WP (Write-Protect) pin is tied to ground during write operations or high to protect the entire memory array.

Also Consider

24LC256-I/SN MCHPMicrochip Technology - Standard speed version limited to 400 kHz clock frequency but often more widely stocked for legacy designs.
M24256-BRMN6P STMicroelectronics - A direct 256Kbit I2C alternative featuring a similar 1.8V to 5.5V supply range and SOIC-8 footprint.
CAT24C256WI-GT3 ONonsemi - Drop-in compatible 256Kbit EEPROM with low power consumption and high endurance ratings.
AT24C256C-SSHL-T MCHPMicrochip Technology - A popular high-performance Atmel-family alternative with similar I2C interface specifications and voltage requirements.

Categories

Memory & Storage > EEPROM