25LC128-E/MF

Overview

The Microchip Technology 25LC128-E/MF is a 128 Kbit Serial Electrically Erasable PROM featuring a 16,384 x 8-bit organization. It operates within a supply voltage range of 2.5V to 5.5V and supports a maximum clock frequency of 10 MHz at voltages between 4.5V and 5.5V. The device utilizes an SPI-compatible serial bus with separate data in (SI) and data out (SO) lines. It is housed in an 8-lead DFN package and is rated for an extended temperature range of -40°C to +125°C.

Feature Summary

• Supports sequential read operations with automatic address pointer incrementation across the memory array.
• Includes hardware write protection via the WP pin combined with the WPEN bit in the STATUS register.
• Features block write protection allowing selection of none, 1/4, 1/2, or all array segments.
• Provides power-on/off data protection circuitry and a write enable latch to prevent inadvertent writes.

Applications

• Data storage in microcontroller systems requiring non-volatile memory
• Configuration parameter storage in industrial control devices
• Calibration data retention in sensor interfaces

Procurement Notes

Verify that the specific ordering suffix corresponds to the Extended temperature grade (-40°C to +125°C) and the 8-lead DFN package format. Confirm compliance with RoHS standards and ensure the device matches the required voltage specifications for the target application environment before finalizing procurement.

Selection Notes

Select this component when an extended operating temperature range up to +125°C is required alongside standard SPI interface compatibility. Ensure the system design accommodates the 2.5V minimum supply voltage constraint, distinguishing it from lower-voltage variants like the 25AA128 series which support 1.8V operation.

Part Context

This part belongs to the 25XX128 family of 128 Kbit serial EEPROMs manufactured by Microchip Technology. It shares functional similarities with the 25AA128 but differs in supply voltage requirements and temperature ratings. The family offers various package options including PDIP, SOIC, and TSSOP, providing flexibility for different PCB layout constraints.

Replacement Considerations

The 25LC128T-E/MF serves as a tape-and-reel variant of this component. Other packages such as SOIC or TSSOP may be considered if physical form factor changes are acceptable, provided the electrical characteristics remain compatible.