24LC02B-E/ST

Memory IC Overview

The Microchip Technology 24LC02B-E/ST is a 2-Kbit (256 x 8) serial EEPROM featuring an I2C-compatible two-wire interface. It operates within a supply voltage range of 2.5V to 5.5V and supports clock frequencies up to 400 kHz. The device utilizes low-power CMOS technology with maximum read current of 1 mA and standby current of 5 µA at extended temperatures. It includes an 8-byte page write buffer, hardware write protection via the WP pin, and Schmitt trigger inputs for noise suppression. The component is housed in an 8-lead TSSOP package and is rated for operation from -40°C to +125°C.

Memory IC Feature Summary

• Hardware write protection allows the entire memory array to be locked against writes when the WP pin is tied to VCC.
• Integrated 8-byte page write buffer enables efficient data transfer by storing multiple bytes before internal programming.
• Schmitt trigger inputs on SDA and SCL lines provide noise suppression to ensure reliable communication on noisy buses.

Memory IC Applications

• Non-volatile data storage for system configuration parameters
• Calibration value retention in industrial control systems
• Device identification and serial number storage

Memory IC Procurement Notes

Verify that the specific ordering suffix corresponds to the TSSOP-8 package and Extended temperature grade (-40°C to +125°C). Confirm the voltage range requirement matches the 2.5V minimum specification for the 24LC02B series, as it differs from lower-voltage variants like the 24AA02. Ensure compatibility with the host controller's I2C pull-up resistor values for the target operating frequency.

Memory IC Selection Notes

Select this part when a 2.5V minimum supply voltage is acceptable and extended industrial temperature performance is required. It is suitable for applications needing hardware-level write protection and high endurance. Consider alternative packages if board space constraints differ from the TSSOP footprint. Verify that the 400 kHz maximum clock speed meets the system bus timing requirements.

Memory IC Part Context

This component belongs to the 24XX02 family of 2-Kbit serial EEPROMs manufactured by Microchip Technology. The family includes variants such as the 24AA02 and 24FC02, which differ primarily in minimum operating voltage and maximum clock frequency capabilities. The 24LC02B specifically targets applications requiring a 2.5V lower bound while maintaining standard I2C compatibility.

Memory IC Replacement Considerations

Direct substitutes include other 24LC02B variants in different packages, such as 24LC02B-I/SN or 24LC02BT-I/MC, provided the temperature grade and package dimensions are compatible with the design.