25LC1024-E/SM

Overview

The Microchip Technology 25LC1024-E/SM is a 1-Mbit (131,072-byte) serial EEPROM utilizing an SPI-compatible interface. It supports a maximum clock frequency of 20 MHz at VCC voltages between 4.5V and 5.5V, and 10 MHz at 2.5V to 5.5V. The device operates within an extended industrial temperature range of -40°C to +125°C with a supply voltage range of 2.5V to 5.5V. It features 256-byte page write capabilities, sector-level write protection, and high endurance specifications.

Feature Summary

• Supports byte and page-level write operations without requiring prior erase cycles
• Includes hardware write protection via the WP pin and software block protection bits
• Features deep power-down mode for minimal standby current consumption
• Provides sector-level write protection allowing selective array security

Applications

• Embedded systems requiring persistent configuration storage
• Industrial control units needing data retention across wide temperature ranges
• Automotive electronics requiring AEC-Q100 qualified components
• Microcontroller-based devices utilizing SPI bus communication

Procurement Notes

Verify that the ordering suffix 'E' corresponds to the extended industrial temperature range (-40°C to +125°C). Confirm the '/SM' suffix indicates the 8-lead SOIJ package type. Ensure the specific revision matches the required datasheet version DS20002064E. Cross-reference the manufacturer part number against official Microchip databases to confirm authenticity and availability status before procurement.

Selection Notes

Select this component when an application requires high-speed SPI communication up to 20 MHz and extended temperature operation. It is suitable for designs needing robust data retention exceeding 200 years and high endurance. Consider the 256-byte page size for efficient data writing. Verify that the system voltage aligns with the 2.5V to 5.5V operating range and that the 8-pin SOIJ package fits the PCB layout constraints.

Part Context

The 25LC1024 belongs to Microchip's 25XX1024 family of 1-Mbit serial EEPROMs. This series offers compatibility with standard SPI protocols and includes features like hold functionality and electronic signatures. The device is designed to replace parallel EEPROMs in space-constrained applications while maintaining non-volatile data storage capabilities through simple serial interfaces.

Replacement Considerations

Compatible substitutes include the 25LC1024-I/SM for industrial temperature ranges and the 25AA1024 variants. Verify pinout compatibility and electrical characteristics such as voltage levels and clock speeds. Ensure the replacement package matches the existing footprint requirements.