LTC4331HUFD#PBF

LTC®4331 is a point-to-point SMBus compatible I²C device extender designed for operation in high noise industrial environments. Using a ±60V fault protected differential transceiver, this can extend an I²C/SMBus bus, including SMBALERT and a control signal, over a single twisted pair differential link up to 1200m. With an extended common mode operating range the solution provides tolerance to large ground differences between nodes. For EMI sensitive environments, a slew rate control pin reduces the EMI emitted from the differential link. In addition, this can act as an I²C to I²C bridge allowing independent bus frequencies between the local and remote networks. The solution is completely transparent to the host requiring no additional code in most cases; however, a control interface is provided for additional configuration and fault monitoring. Typical applications are industrial control and sensors, lighting and sound system control.

• Protected from overvoltage line faults to ±60V
• Remote interrupt/SMBALERT and control signals
• Low EMI mode, SMBus 3.0 compatible
• Operating supply range from 3 to 5.5V (TA=25°C, VCC=5V, VL=3.3V, GND=0V)
• Operating supply current is 40µA maximum (low power: ON=0, TA=25°C, VCC=5V, VL=3.3V, GND=0V)
• Maximum driver short-circuit current is ±150mA typical (–60V≤(A or B)≤60V, TA=25°C, VCC=5V, VL=3.3V)
• 20-lead plastic QFN package
• Temperature rating range from -40°C to 125°C

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