The 24LC02BT-I/ST: A Robust 2-Wire Serial EEPROM Solution from Microchip

In the realm of non-volatile memory, serial EEPROMs remain a fundamental component for storing critical data in embedded systems. The Microchip 24LC02BT-I/ST stands out as a highly reliable and versatile 2-wire serial EEPROM memory chip, designed to meet the needs of a vast array of applications. This 2-Kbit (256 x 8) memory device provides a simple and efficient method for storing parameters, calibration data, and other user-specific information that must be retained when system power is removed.

A key feature of this IC is its utilization of the I²C (Inter-Integrated Circuit) protocol, also referred to as a 2-wire serial interface. This design minimizes the required number of I/O pins on the host microcontroller, comprising only a bidirectional data line (SDA) and a clock line (SCL). This efficient use of pins is crucial for space-constrained and cost-sensitive designs. The 24LC02BT-I/ST supports a 400 kHz clock frequency, enabling reasonably high-speed data transfers while maintaining robust communication integrity.

The device offers enhanced hardware-level data protection through the use of hardware write-protection via the WC (Write Control) pin. When this pin is tied to VCC, the entire memory array is protected from inadvertent write operations, safeguarding vital data. For software data protection, the chip incorporates a write-protect scheme that initiates after each byte or page write operation, preventing an erroneous write sequence from corrupting the stored information.

Organized in a 16-byte page write buffer, the 24LC02BT-I/ST allows for faster programming of small data blocks. Its voltage range of 1.7V to 5.5V makes it exceptionally suited for both low-power and wide-voltage-range applications, including portable battery-operated devices and industrial systems. The -I/ST suffix denotes an industrial temperature range (-40°C to +85°C) and a standard TSSOP package, ensuring reliable performance in demanding environments.

ICGOODFIND: The Microchip 24LC02BT-I/ST is an exemplary serial EEPROM, merging a minimal pin-count I²C interface, robust data protection features, and a wide operating voltage into a single, cost-effective package. Its reliability and ease of integration make it an ideal choice for designers seeking a simple non-volatile memory solution.

Keywords: I²C, Non-Volatile Memory, Low-Power, Hardware Write-Protect, Serial EEPROM