25LC256-E/MF

Overview

The Microchip Technology 25LC256-E/MF is a 256 Kbit (32K x 8) Serial Electrically Erasable PROM featuring an SPI-compatible interface. It operates within a voltage range of 2.5V to 5.5V and supports clock frequencies up to 10 MHz. The device utilizes an 8-lead DFN package with the 'MF' suffix designation. It offers industrial temperature support from -40°C to +125°C, ensuring reliable performance in demanding environments.

Feature Summary

• Supports high-speed serial communication via a standard SPI bus with hold functionality for interrupt servicing.
• Includes hardware write protection mechanisms such as block protection bits and a dedicated write-protect pin.
• Features built-in power-on/off data protection circuitry and a write enable latch to prevent inadvertent writes.

Applications

• Data storage for configuration parameters in microcontroller systems
• Non-volatile memory for firmware or calibration data logging
• Industrial control devices requiring extended temperature operation

Procurement Notes

Verify that the ordering suffix matches the required package type and temperature grade. Confirm the specific revision level against the manufacturer's latest datasheet to ensure compatibility with design specifications. Check for any recent product change notices regarding packaging or material composition updates.

Selection Notes

Select this component when an SPI interface is preferred over I2C for system architecture. Ensure the operating voltage aligns with the 2.5V to 5.5V specification. Consider the 8-lead DFN footprint constraints during PCB layout. Verify that the application does not require the lower voltage operation available in the 25AA256 variant.

Part Context

This EEPROM belongs to the 25XX256 family, which shares functional similarities with the 25AA256 but differs in supply voltage requirements. The 25LC256 series provides non-volatile storage solutions compatible with various microcontroller families. The 'E' suffix indicates extended temperature range capabilities suitable for harsh operational conditions.

Replacement Considerations

The 25AA256 serves as a functional substitute with a wider voltage range of 1.8V to 5.5V. Other variants within the 25LC256 family include different package options such as SOIC, TSSOP, and PDIP. Ensure pinout compatibility and voltage level alignment when substituting.