25LC040AT-E/OT

Overview

The Microchip Technology 25LC040AT-E/OT is a 4 Kbit Serial Electrically Erasable Programmable Read-Only Memory (EEPROM) utilizing a SPI compatible serial bus. It features a 512 x 8-bit organization with a maximum clock frequency of 10 MHz and operates within a supply voltage range of 2.5V to 5.5V. The device supports industrial temperature ranges from -40°C to +85°C and automotive ranges up to +125°C, housed in a compact 6-lead SOT-23 package.

Feature Summary

• Supports sequential read operations and page write modes for efficient data handling
• Includes built-in power-on/off data protection circuitry and a write enable latch
• Features hardware write protection via the WP pin and selectable block protection levels

Applications

• Microcontroller system configuration storage
• Calibration data retention in embedded systems
• Parameter logging in industrial monitoring devices

Procurement Notes

Verify that the specific ordering suffix matches the required temperature grade and package type. Confirm RoHS compliance status and ensure the selected variant aligns with the target application's voltage and environmental specifications before procurement.

Selection Notes

Select this component when a small surface-mount footprint is required alongside robust data retention capabilities. Ensure the host microcontroller supports SPI communication and can manage the necessary control signals for reliable memory access and write protection.

Part Context

This part belongs to the 25AA040A/25LC040A family of 4K bit serial EEPROMs. It shares core architectural similarities with other variants but is distinguished by its specific voltage operating range and physical package configuration suitable for space-constrained designs.

Replacement Considerations

Direct substitutes include other 25LC040A variants such as 25LC040AT-I/OT or 25LC040AT-E/SN, provided the package and temperature requirements are met.