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25LC1024-I/P

MCHP25LC1024-I/P

Microchip Technology
EEPROM Memory IC 1Mbit SPI 20 MHz 8-PDIP
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Overview

The 25LC1024-I/P is a 1 Mbit serial EEPROM utilizing the SPI bus with a clock frequency of up to 20 MHz. It is organized as 128K x 8 bits and operates across a wide voltage range of 2.5V to 5.5V, making it compatible with both 3.3V and 5V logic systems. This specific variant comes in an 8-pin PDIP package, which is ideal for prototyping and through-hole assembly.

Why Choose This Part

The 1 Mbit density is high for an EEPROM, providing significant non-volatile storage without the complexity of Flash page management. Its wide 2.5V to 5.5V supply range and standard SPI interface ensure compatibility with a vast array of microcontrollers, while the low 1 microamp standby current is excellent for battery-powered applications.

Applications

Configuration Storage
Storing device calibration constants and user settings that must persist through power cycles.
Data Logging
Recording sensor telemetry or system events in low-power industrial environments.
Firmware Backup
Serving as a secondary storage location for recovery firmware images in embedded systems.
Prototyping
Easy integration into breadboards or sockets for testing SPI communication and memory management logic.

Key Specifications

Technology EEPROM
Memory Size 1Mbit
Memory Type Non-Volatile
Memory Format EEPROM
Mounting Type Through Hole
Package / Case 8-DIP (0.300", 7.62mm)
Clock Frequency 20 MHz
Memory Interface SPI
Voltage - Supply 2.5V ~ 5.5V
Memory Organization 128K x 8
Operating Temperature -40degC ~ 85degC (TA)
Supplier Device Package 8-PDIP
Write Cycle Time - Word, Page 6ms

Getting Started

To use this part, connect the SPI pins (CS, SCK, SI, SO) to your microcontroller and ensure the WP and HOLD pins are pulled high if not in use. Development can be performed on a breadboard using any standard SPI library, such as the Arduino SPI library or Microchip MCC. Ensure the instruction set from the datasheet is followed for the 24-bit addressing required by this 128KB density.