25LC040AT-E/SN16KVAO

Overview

The Microchip Technology 25LC040AT-E/SN16KVAO is a 4 Kbit (512 x 8) Serial Electrically Erasable Programmable Read-Only Memory (EEPROM). It operates within a supply voltage range of 2.5V to 5.5V and supports a maximum clock frequency of 10 MHz via a standard SPI interface. The device features automotive temperature ratings (-40°C to +125°C), 1,000,000 erase/write cycle endurance, and data retention exceeding 200 years. It includes hardware write protection, block write protection, and self-timed write cycles.

Feature Summary

• Supports high-speed serial communication with a maximum clock frequency of 10 MHz
• Includes built-in power-on/off data protection and a write enable latch mechanism
• Provides flexible block write protection for none, one-quarter, one-half, or all of the memory array
• Features a hold pin to pause serial transmission without resetting the sequence

Applications

• Microcontroller systems requiring non-volatile data storage
• Automotive electronic control units operating in harsh thermal environments
• Industrial devices needing reliable parameter logging
• Embedded systems utilizing SPI bus interfaces

Procurement Notes

Verify the specific suffix '16KVAO' against official Microchip documentation to confirm it denotes a valid automotive-grade variant with the specified package and temperature range. Ensure compatibility with system voltage levels and SPI timing requirements before integration. Confirm RoHS compliance status through current manufacturer datasheets.

Selection Notes

Select this component when an SPI EEPROM with automotive reliability and wide operating temperature ranges is required. It is suitable for applications demanding high endurance and long-term data retention. Consider the 8-lead SOIC package for surface mount assembly. Verify that the 2.5V minimum supply voltage aligns with the target system's power architecture.

Part Context

This part belongs to the 25LC040A family of 4 Kbit SPI Serial EEPROMs manufactured by Microchip Technology. The family offers various package options including SOIC, PDIP, MSOP, TSSOP, DFN, and SOT-23. The 'E' designation indicates automotive grade specifications, while 'SN' identifies the 8-lead SOIC package type.

Replacement Considerations

Direct replacements include other 25LC040A variants with compatible packages and temperature grades. Cross-reference pinouts and electrical characteristics carefully. Alternative manufacturers may offer functionally similar SPI EEPROMs but require verification of voltage ranges and timing parameters.