25LC256T-E/MF

Overview

The Microchip Technology 25LC256T-E/MF is a 256 Kbit Serial Electrically Erasable PROM featuring SPI-compatible bus access. It utilizes low-power CMOS technology with a supply voltage range of 2.5V to 5.5V and supports clock frequencies up to 10 MHz. The device offers 32,768 x 8-bit organization within a DFN-8 package. It provides high reliability with 1,000,000 erase/write cycles endurance and data retention exceeding 200 years. Operating temperature ranges from -40°C to +125°C.

Feature Summary

• Supports serial communication via standard SPI interface with hold functionality for interrupt servicing
• Includes hardware write protection mechanisms and block protection capabilities
• Features self-timed erase and write cycles with automatic status polling
• Compliant with RoHS standards and designed for industrial extended temperature applications

Applications

• Industrial sensor nodes requiring non-volatile parameter storage
• Microcontroller systems needing reliable configuration data retention
• Embedded devices utilizing software-simulated SPI interfaces

Procurement Notes

Verify the specific suffix 'MF' corresponds to the DFN-8 package type when sourcing. Confirm the 'E' designation indicates the extended temperature range (-40°C to +125°C) required for your application environment. Ensure compatibility with the 2.5V to 5.5V supply voltage specifications during system design validation.

Selection Notes

Select this component for applications requiring robust data retention and high endurance in harsh environments. The DFN-8 package suits space-constrained surface mount designs. Consider the 10 MHz maximum clock speed for high-throughput data logging requirements. Verify that the system voltage aligns with the specified operating range for optimal performance.

Part Context

This part belongs to the 25LC256 family of serial EEPROMs manufactured by Microchip Technology. It shares functional similarities with other variants like the 25LC256T-I/ST but differs in packaging and temperature rating. The T suffix typically denotes tape and reel packaging, while MF specifies the DFN-8 form factor.

Replacement Considerations

Direct substitutes include the 25LC256T-I/ST for industrial temperature range or other 25LC256 variants with compatible pinouts. Verify package dimensions and electrical characteristics match before substitution.

FAQ

How does the HOLD pin function during SPI communication?

The HOLD pin allows pausing serial communication without resetting the sequence. It must be held low while SCK is low to pause, and brought high while SCK is low to resume.

What is the maximum page size for write operations?

The device supports a page size of 64 bytes. Write operations are limited to writing within a single physical page boundary.