The P82B715D is an I2C Bus Extender buffers both the serial data (SDA) and serial clock (SCL) signals on the I2C bus and allows for extension of the I2C bus, while retaining all the operating modes and features of the I2C system. The I2C bus capacitance limit of 400pF restricts practical communication distances to a few meters. The advantages of the P82B715 is that it can isolate bus capacitance such that the total loading (devices, connectors, traces and wires) of the new bus or remote I2C nodes are not apparent to other I2C buses (or nodes). This is achieved by using one P82B715 device at each end of a long cable. The pin Lx of one P82B715 device has to be connected to Lx of the second P82B715 (similarly for Ly). This allows the total system capacitance load to be around 3000pF.
Supports bidirectional data transfer of I2C bus signals
Dual bidirectional unity-voltage-gain buffer with no external directional control required
Drives 10x lower-impedance bus wiring for improved noise immunity
Multi-drop distribution of I2C signals using low-cost twisted-pair cables
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