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25LC256

MCHP25LC256

Microchip Technology
Microchips older SPI 256-Kbit EEPROM family with similar pinout and use cases
NRND2,912 in stock
Datasheet Digi-Key Mouser Compare Prices

Overview

The 25LC256 is a 256-Kbit Serial Electrically Erasable PROM (EEPROM) with a memory organization of 32K x 8 bits. It utilizes a high-speed SPI interface supporting clock frequencies up to 5 MHz and operates over a wide voltage range of 2.5V to 5.5V. This device is designed for high-reliability applications, featuring an extended temperature range up to 150 degrees Celsius and AEC-Q100 qualification.

Why Choose This Part

The 25LC256 offers extreme thermal robustness with operation up to 150 degrees Celsius, making it suitable for automotive and harsh industrial environments. Its 64-byte page write capability and self-timed cycles simplify the firmware overhead for data management. Additionally, the block write protection features provide security against accidental data overwrites in critical memory regions.

Applications

Automotive Sensor Calibration
Storing lookup tables and calibration constants in high-temperature engine or transmission control environments.
Industrial Data Logging
Recording system parameters and error logs in equipment requiring non-volatile storage with frequent write cycles.
Configuration Storage
Retaining user settings and network configuration data for embedded systems across power cycles.

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 5 MHz
Memory Interface SPI
Voltage - Supply 2.5V ~ 5.5V
Memory Organization 32K x 8
Operating Temperature -40degC ~ 150degC (TA)
Supplier Device Package 8-SOIC
Write Cycle Time - Word, Page 6ms

Getting Started

To interface with the 25LC256, configure your microcontroller SPI peripheral for Mode 0 or Mode 3 operation. Ensure the CS pin is toggled for every instruction, and monitor the WIP (Write In Progress) bit in the Status Register to manage the 6ms write cycle time. For rapid prototyping, many Microchip PIC development boards include 8-pin SOIC footprints compatible with this family.

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 (this part) 5 M -40degC ~ 150degC .. 6m 2,912
25LC256-I/SN 10 M -40degC ~ 85degC (.. 5m 6,642
Also available as: 25LC256-I/P

Categories

Memory & Storage > EEPROM