25LC1024-E/P

Overview

The Microchip Technology 25LC1024-E/P is a 1-Mbit (131,072-byte) serial EEPROM utilizing an SPI-compatible interface. It supports a maximum clock frequency of 20 MHz and operates within a supply voltage range of 2.5V to 5.5V. The device features a 256-byte page write capability with a self-timed write cycle of up to 6 ms. It offers high reliability with 1 million erase/write cycles and data retention exceeding 200 years. The extended industrial temperature variant (-E) functions from -40°C to +125°C and is housed in an 8-lead PDIP package.

Feature Summary

• Supports byte-level and page-level write operations without requiring prior sector or chip erase cycles.
• Includes programmable hardware write protection via the WP pin and nonvolatile block protection bits in the STATUS register.
• Features a HOLD input that allows suspension of serial communication without resetting the internal address pointer.
• Provides deep power-down mode for minimal current consumption and electronic signature identification.

Applications

• Non-volatile storage for microcontroller configuration parameters
• Calibration data and system log persistence
• Embedded systems requiring reliable data retention under extreme temperatures

Procurement Notes

Verify the specific suffix 'E' confirms the extended industrial temperature rating (-40°C to +125°C). Confirm the '/P' designation corresponds to the 8-lead PDIP package type. Ensure the required operating voltage aligns with the specified 2.5V to 5.5V range for your application design.

Selection Notes

Select this component when high endurance and long-term data retention are critical requirements. The extended temperature range makes it suitable for harsh environments where standard industrial parts may fail. Consider the PDIP package only if through-hole mounting is necessary for mechanical stability or prototyping purposes.

Part Context

This part belongs to the 25LC1024 series of 1-Mbit SPI serial EEPROMs manufactured by Microchip Technology. The series includes variants with different temperature ratings and packages, such as the Industrial grade (-I) and Automotive qualified versions. The 25LC1024 provides a robust solution for applications needing substantial non-volatile memory density in a compact serial format.

Replacement Considerations

Direct substitutes include other 25LC1024 variants with identical electrical specifications but different packages, such as 25LC1024-E/SM (SOIJ) or 25LC1024-E/MF (DFN-S). Cross-brand replacements require verification of pin compatibility and instruction set adherence.