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25LC256-I/SN

MCHP25LC256-I/SN

Microchip Technology
Widely used 256Kbit SPI EEPROM available in multiple package options for easy substitution.
NRND6,642 in stock
Datasheet Digi-Key Mouser Compare Prices

Overview

The 25LC256-I/SN is a 256Kbit SPI Serial EEPROM organized as 32K x 8 bits, designed for high-endurance non-volatile storage in embedded systems. It operates over a wide voltage range of 2.5V to 5.5V and supports clock speeds up to 10 MHz, making it compatible with most modern microcontrollers. Its low 1uA standby current and small 8-pin SOIC footprint make it ideal for power-constrained applications.

Why Choose This Part

The part offers high reliability with a self-timed erase and write cycle of 5ms and built-in block write protection to prevent accidental data loss. Its compatibility with standard SPI modes (0,0 and 1,1) and wide 2.5V to 5.5V supply range ensures it can be integrated into both legacy 5V systems and modern 3.3V logic circuits without level shifting.

Applications

Configuration Storage
Storing calibration data, network settings, and user preferences that must persist through power cycles.
Data Logging
Recording sensor readings or system events in industrial environments where data integrity is critical.
Firmware Backup
Acting as a secondary storage location for bootloader parameters or recovery firmware images.
Wearable Electronics
Utilizing the 1uA standby current for ultra-low power consumption in battery-operated consumer devices.

Key Specifications

Technology EEPROM
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 10 MHz
Memory Interface SPI
Voltage - Supply 2.5V ~ 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 25LC256-I/SN, use a standard SPI peripheral configured for Mode 0,0 or 1,1. For rapid prototyping, the PDIP version (25LC256-I/P) is compatible with standard breadboards, while the SOIC version can be evaluated using Microchip's Serial SuperChip Starter Kit or generic SOIC-8 to DIP adapters. Ensure a 0.1uF ceramic decoupling capacitor is placed close to the VCC pin for stable operation during the 6mA active write cycles.

Part of 25LCxx / AT25 SPI EEPROM family » 25LC256

25LC256 Family

Comparing specs that differ across variants. The current part is highlighted.

Part Number Clock Frequency Temp Range Write Cycle Time - Word, Page Stock
25LC256-I/SN (this part) 10 M -40degC ~ 85degC (.. 5m 6,642
25LC256 5 M -40degC ~ 150degC .. 6m 2,912
Also available as: 25LC256-I/P

Categories

Memory & Storage > EEPROM