24LC02BHT-E/SN

Memory IC Overview

The Microchip Technology 24LC02BHT-E/SN is a 2 Kbit (256 x 8) serial EEPROM featuring an I2C-compatible two-wire interface. It operates on a single supply voltage ranging from 2.5 V to 5.5 V and supports clock frequencies up to 400 kHz. The device utilizes low-power CMOS technology with a maximum read current of 1 mA and standby current of 1 µA. It includes hardware write protection for the upper half of the memory array via the WP pin, an 8-byte page write buffer, and Schmitt trigger inputs for noise suppression. The component is housed in an 8-lead SOIC package and is rated for extended industrial temperatures from -40°C to +125°C.

Memory IC Feature Summary

• Hardware write protection for the upper half of the memory array (addresses 80h-FFh) controlled by the WP pin state.
• Integrated 8-byte page write buffer allows efficient data transfer before internal self-timed programming cycles.
• Schmitt trigger inputs on SDA and SCL lines provide enhanced noise spike suppression for reliable operation on noisy buses.
• Output slope control circuitry minimizes ground bounce effects during switching operations.

Memory IC Applications

• Non-volatile data storage for system configuration parameters
• Calibration constants and offset values retention
• Device identification and serial number logging

Memory IC Procurement Notes

Verify that the ordering suffix 'HT' corresponds to the tape-and-reel packaging format as specified in the manufacturer's documentation. Confirm the temperature grade 'E' matches the required extended operating range of -40°C to +125°C. Ensure the 'SN' suffix aligns with the 8-lead SOIC package requirement. Cross-reference the specific part number against the latest datasheet revision to confirm electrical characteristics and pinout compatibility.

Memory IC Selection Notes

Select this component when a 2 Kbit non-volatile memory solution with hardware write protection is required. The extended temperature rating makes it suitable for harsh industrial environments. The I2C interface simplifies integration with microcontrollers having limited GPIO resources. Consider the 8-byte page buffer for applications requiring frequent small data updates to optimize bus throughput.

Memory IC Part Context

This device belongs to the 24XX02H family of serial EEPROMs, which share architectural similarities but differ in voltage ranges and features. The 24LC02BH variant specifically targets applications requiring a minimum 2.5 V supply, distinguishing it from the 24AA02H series which supports lower voltages down to 1.7 V. All members of this family utilize the same I2C protocol and pin configurations.

Memory IC Replacement Considerations

• 24LC02BH-I/SN
• 24LC02BH-E/ST

Memory IC FAQ

How does the hardware write protection function?

Connecting the WP pin to VCC inhibits all write operations to the upper half of the memory array (addresses 80h through FFh). The lower half remains writable. Read operations are unaffected by the WP pin state.

What is the purpose of the A0, A1, and A2 pins?

For the 2Kbit 24XX02H devices, the A0, A1, and A2 pins are not connected internally. They may be left floating or tied to either VSS or VCC without affecting device operation.