25LC040AT-I/MS

Overview

The Microchip Technology 25LC040AT-I/MS is a 4 Kbit (512 x 8-bit) 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 an SPI-compatible serial bus. The device features self-timed erase and write cycles with a maximum duration of 5 ms. It includes hardware write protection, block write protection, and data retention exceeding 200 years.

Feature Summary

• Supports SPI-compatible serial communication with up to 10 MHz clock frequency
• Includes built-in write protection mechanisms such as power-on/off data protection and a dedicated write-protect pin
• Features block write protection allowing selective array protection for none, one, two, or all segments

Applications

• Microcontroller system data storage
• Configuration parameter storage
• Calibration data retention

Procurement Notes

Verify the specific suffix 'I' confirms Industrial temperature range (-40°C to +85°C) and 'MS' denotes the MSOP-8 package. Confirm RoHS compliance status matches current manufacturing standards. Ensure the ordering code aligns with the required voltage and speed specifications for your application design.

Selection Notes

Select this component when a low-pin-count EEPROM with hardware write protection is required. The MSOP-8 package offers a compact surface-mount solution suitable for space-constrained designs. Verify that the 2.5V minimum operating voltage meets your system's power supply requirements compared to lower-voltage alternatives.

Part Context

This part belongs to the 25LC040A family of 4 Kbit Serial EEPROMs from Microchip Technology. It shares functional similarities with the 25AA040A but differs in its minimum operating voltage specification. The device is designed for high-reliability applications requiring non-volatile memory with robust data protection features.

Replacement Considerations

Direct substitutes include other variants within the 25LC040A family with different packages or temperature grades, such as 25LC040AT-I/ST or 25LC040AT-E/MC. Cross-family replacements like the 25AA040A require verification of voltage compatibility.