25LC128-I/MF

Overview

The Microchip Technology 25LC128-I/MF is a 128 Kbit (16,384 x 8-bit) Serial Electrically Erasable PROM accessed via an SPI-compatible serial bus. It operates within a voltage range of 2.5V to 5.5V and supports a maximum clock frequency of 10 MHz at VCC ≥ 4.5V. The device features a 64-byte page buffer, self-timed erase/write cycles with a maximum duration of 5 ms, and industrial temperature operation from -40°C to +85°C. It is housed in an 8-lead DFN package.

Feature Summary

• Supports high-speed SPI communication with up to 10 MHz clock frequency
• Includes hardware write protection via WP pin and software block protection for array segments
• Features power-on/off data protection circuitry and a write enable latch
• Provides hold functionality to pause serial transmission without resetting the sequence

Applications

• Microcontroller system configuration storage
• Calibration parameter persistence
• Data logging and event recording
• Embedded firmware version tracking

Procurement Notes

Verify that the specific ordering suffix matches the required package type and temperature grade. Confirm the voltage range requirements align with the 2.5V minimum specification for the LC series. Ensure the design accounts for the 64-byte page write boundary limitations to prevent data wrap-around errors during programming sequences.

Selection Notes

Select this component when an SPI interface is preferred over I2C for higher throughput or simpler protocol implementation. The 25LC128 is suitable for applications requiring robust data retention and high endurance. Consider the DFN package dimensions if space constraints are critical compared to TSSOP or SOIC alternatives.

Part Context

This part belongs to the 25XX128 family of 128 Kbit serial EEPROMs. It shares functional compatibility with the 25AA128, though the LC variant specifies a 2.5V minimum supply voltage compared to the AA variant's 1.8V minimum. Both variants offer identical memory organization and instruction sets.

Replacement Considerations

The 25AA128-I/MF is a functionally equivalent alternative with a lower minimum operating voltage of 1.8V. Other 25LC128 variants such as 25LC128-I/ST or 25LC128-I/SN provide the same electrical characteristics but utilize different packaging formats like TSSOP or SOIC.