25LC040A-M/SN

Overview

The Microchip Technology 25LC040A-M/SN is a 4 Kbit Serial Electrically Erasable Programmable Read-Only Memory (EEPROM). It features a 512 x 8-bit organization and communicates via a Serial Peripheral Interface (SPI) compatible bus. The device operates within a supply voltage range of 2.5V to 5.5V and supports a maximum clock frequency of 10 MHz. It utilizes an 8-lead SOIC package.

Feature Summary

• Supports sequential read operations and page write mode with up to 16 bytes per page.
• Includes built-in write protection mechanisms such as power-on/off data protection, a write enable latch, and a dedicated write-protect pin.
• Features block write protection allowing selective protection of none, one-quarter, one-half, or the entire memory array.

Applications

• Microcontroller systems requiring non-volatile data storage
• Industrial applications operating in extended temperature ranges
• Automotive electronic control units

Procurement Notes

Verify that the specific suffix -M/SN corresponds to the required industrial temperature grade and SOIC package configuration. Confirm RoHS compliance status for the manufacturing lot. Ensure the ordering documentation matches the exact part number to avoid discrepancies in voltage specifications or package dimensions.

Selection Notes

Select this component when a 4 Kbit EEPROM is needed with SPI interface compatibility. The 2.5V to 5.5V operating range suits standard logic levels. Consider the 10 MHz clock speed for high-throughput requirements. Verify that the 8-lead SOIC package fits the available PCB footprint and assembly constraints.

Part Context

This part belongs to the 25XX040A family of serial EEPROMs from Microchip Technology. It shares architectural similarities with the 25AA040A and 25C040 variants but differs in supply voltage and temperature ratings. The 'A' designation indicates an updated version of the original 25LC040 series.

Replacement Considerations

Direct substitutes include other 25LC040A variants with different packages or temperature grades, such as 25LC040A-I/SN or 25LC040A-E/ST. Cross-reference datasheets for pinout and electrical characteristic compatibility before substitution.