24LC02BT-E/OT

Memory IC Overview

The Microchip Technology 24LC02BT-E/OT is a 2-Kbit (256 x 8-bit) serial EEPROM featuring an I²C-compatible two-wire interface. It operates within a voltage range of 2.5V to 5.5V and supports clock frequencies up to 400 kHz at VCC ≥ 2.5V, or 100 kHz at lower voltages. The device includes an 8-byte page write buffer, hardware write-protect capability via the WP pin, and Schmitt trigger inputs for noise suppression. It is qualified for extended temperature operation from -40°C to +125°C and housed in an 8-lead OT package.

Memory IC Feature Summary

• Supports bidirectional data transfer via a standard two-wire serial bus with start and stop conditions.
• Includes hardware write protection that inhibits all memory writes when the WP pin is tied high.
• Features internal address pointer for automatic incrementation during sequential read operations.
• Provides acknowledge polling capability to determine when internal write cycles are complete.

Memory IC Applications

• Data logging in industrial control systems
• Configuration storage for embedded microcontrollers
• Parameter retention in automotive electronic modules

Memory IC Procurement Notes

Verify the suffix 'E' confirms the Extended temperature grade (-40°C to +125°C) and 'OT' denotes the specific 8-lead thin small-outline package variant. Confirm the 'B' indicates the latest revision of the 24LC02B family. Ensure the source document matches DS20001709N for accurate electrical specifications regarding the 2.5V minimum operating voltage.

Memory IC Selection Notes

Select this component when a low-pin-count non-volatile memory solution is required for storing small amounts of configuration data. The 24LC02B series is suitable for applications requiring hardware write protection and compatibility with standard I²C buses. Consider the extended temperature rating if the environment exceeds standard industrial limits. Verify power supply stability as the device requires a minimum of 2.5V for full speed operation.

Memory IC Part Context

This part belongs to the 24XX02 family of 2-Kbit serial EEPROMs, which also includes the 24AA02 and 24FC02 variants. While sharing the same memory architecture and interface, the 24LC02B is distinguished by its 2.5V minimum operating voltage requirement compared to the 1.7V minimum of the 24AA02 and 24FC02. All variants utilize the same physical package options and pinout configurations.

Memory IC Replacement Considerations

Direct substitutes include other 24LC02B parts from Microchip with different temperature grades or packages, such as 24LC02BT-I/OT for industrial temperature. Cross-brand replacements must match the 2.5V-5.5V supply range, 400 kHz I²C speed, and 8-lead footprint. Verify that any alternative maintains the same hardware write-protect functionality and page size.

Memory IC FAQ

How does the hardware write-protect feature function?

When the WP pin is connected to VCC, write operations to the entire memory array are inhibited. Read operations remain unaffected regardless of the WP pin state.

What happens if a page write crosses a physical page boundary?

If a page write command attempts to write across a physical page boundary, the data wraps around to the beginning of the current page, overwriting previously stored data, rather than proceeding to the next page.