25LC128-E/SN

Overview

The Microchip Technology 25LC128-E/SN is a 128 Kbit Serial Electrically Erasable PROM featuring an SPI-compatible interface. It operates within a supply voltage range of 2.5V to 5.5V and supports a maximum clock frequency of 10 MHz at higher voltages. The device utilizes a 16K x 8-bit organization with a 64-byte page size, housed in an 8-lead SOIC package. It functions across an extended temperature range from -40°C to +125°C.

Feature Summary

• Supports high-speed serial communication via SPI bus with hold functionality for interrupt servicing
• Includes hardware write protection mechanisms and block protection capabilities
• Features self-timed erase and write cycles with built-in power-on data protection

Applications

• Data storage in microcontroller systems requiring non-volatile memory
• Industrial control applications operating in extended temperature environments
• Embedded systems needing secure configuration parameter retention

Procurement Notes

Verify the specific ordering suffix matches the required temperature grade and package type. Confirm RoHS compliance status through official manufacturer documentation. Ensure the component source aligns with authorized distribution channels to guarantee authenticity and traceability.

Selection Notes

Select this part when extended industrial temperature operation is required alongside standard SPI connectivity. Compare against the 25AA128 variant if lower voltage support down to 1.8V is necessary instead of the 2.5V minimum specified here.

Part Context

This component belongs to the 25XX128 family of 128 Kbit serial EEPROMs manufactured by Microchip Technology. It shares architectural similarities with the 25AA128 but differs primarily in its operational voltage range and temperature specifications, catering specifically to robust industrial environments.

Replacement Considerations

The 25LC128-I/SN serves as a direct substitute for applications restricted to the industrial temperature range (-40°C to +85°C). Verify that the replacement meets all electrical and environmental requirements of the original design.

FAQ

How does the HOLD pin function during serial communication?

The HOLD pin allows suspension of transmission mid-sequence without resetting the sequence. Inputs are ignored while held low, except for Chip Select.

What is the purpose of the WPEN bit in the STATUS register?

The WPEN bit enables or disables the hardware write-protect function controlled by the physical WP pin. When low, the WP pin function is blocked.