25LC256T-I/MF

Overview

The Microchip Technology 25LC256T-I/MF is a 256 Kbit (32,768 x 8-bit) Serial Electrically Erasable PROM. It utilizes an SPI-compatible serial bus for data access and operates within a voltage range of 2.5V to 5.5V. The device supports a maximum clock frequency of 10 MHz at 4.5V to 5.5V supply levels. It features self-timed erase and write cycles with a maximum duration of 5 ms. The component is housed in an 8-lead DFN package and is rated for industrial temperature operation from -40°C to +85°C.

Feature Summary

• Supports block-level write protection allowing configuration to protect none, one-quarter, one-half, or the entire memory array via status register settings.
• Includes built-in power-on/off data protection circuitry and a write enable latch to prevent inadvertent writes during system transitions.
• Provides a Hold input pin that allows the host processor to pause serial communication without resetting the internal address pointer.

Applications

• Storage of calibration parameters and device identification codes in industrial sensor nodes
• Configuration data persistence in microcontroller-based systems requiring non-volatile storage
• Embedded logging applications where moderate endurance and low power consumption are required

Procurement Notes

Verify the suffix 'MF' corresponds to the 8-lead DFN package type as specified in the datasheet. Confirm the 'I' designation indicates the Industrial temperature range (-40°C to +85°C). Ensure the specific variant matches the required voltage and interface specifications for the target application design.

Selection Notes

Select this component when a 256 Kbit capacity is required with SPI interface compatibility. It is suitable for designs needing hardware write protection and hold functionality. Consider the DFN package constraints for PCB layout. Verify that the operating voltage and temperature range align with the system environment requirements.

Part Context

This part belongs to the 25LC256 family of Serial EEPROMs manufactured by Microchip Technology. It shares functional characteristics with other variants in the series, differing primarily in package style and temperature rating. The device is designed for direct interfacing with microcontrollers supporting standard SPI protocols.

Replacement Considerations

Cross-reference with other 25LC256 variants such as 25LC256-I/ST or 25LC256-I/SN if package compatibility differs. Ensure substitute parts maintain the same SPI command set and electrical characteristics for seamless integration.