25LC1024-I/MF

Overview

The Microchip Technology 25LC1024-I/MF is a 1-Mbit (128K x 8) serial EEPROM utilizing an SPI-compatible interface. It operates within a voltage range of 2.5V to 5.5V and supports clock frequencies up to 20 MHz at higher voltages or 10 MHz at lower voltages. The device features a 256-byte page size, 1 million erase/write cycle endurance, and data retention exceeding 200 years. It includes sector write protection, deep power-down current of 1 µA, and operates across an industrial temperature range of -40°C to +85°C.

Feature Summary

• Supports byte-level and page-level write operations with self-timed erase cycles
• Includes hardware write-protect pin and software-configurable sector protection
• Features low-power CMOS technology with deep power-down mode
• Provides electronic signature for device identification

Applications

• Microcontroller system configuration storage
• Data logging in industrial environments
• Parameter storage for embedded devices

Procurement Notes

Verify the suffix 'I' confirms the industrial temperature range (-40°C to +85°C). Confirm the package type 'MF' corresponds to the 8-lead DFN-S form factor. Ensure compatibility with the host system's SPI voltage levels and clock speed requirements before integration.

Selection Notes

Select this component when high-speed SPI communication is required alongside non-volatile storage. Consider the 256-byte page size for write efficiency. Verify that the operating voltage aligns with the system supply rails. Check if sector protection meets security requirements.

Part Context

This part belongs to the 25LC1024 series of 1-Mbit serial EEPROMs from Microchip Technology. It shares functional similarities with other members like the 25AA1024 but differs in specific electrical characteristics and temperature ratings. The series is designed for applications requiring reliable data retention and fast access times.

Replacement Considerations

Direct substitutes include other 25LC1024 variants with different packages such as PDIP or SOIJ, provided the temperature rating matches the application needs. Cross-referencing with similar density SPI EEPROMs requires verifying pinout and command set compatibility.

FAQ

What is the maximum clock frequency supported by the 25LC1024?

The device supports a maximum clock frequency of 20 MHz when VCC is between 4.5V and 5.5V. At lower voltages (2.5V to <5.5V), the maximum frequency is 10 MHz.

How does the Write-Protect (WP) pin function?

The WP pin works in conjunction with the WPEN bit in the STATUS register. When WPEN is high and WP is low, writes to the nonvolatile bits in the STATUS register are disabled. If WPEN is low, the WP pin function is blocked.

Can the device be written without prior erasing?

Yes, the 25LC1024 supports byte and page write operations without requiring a prior erase cycle. However, page erase instructions are available if needed.