 However using a differential driver, an alternate version of I2C can communicate up to 20 meters (possibly over 100 meters) over CAT5 or other cable.Several standard connectors carry I2C signals.For example, the UEXT connector carries I2C;
the 10-pin iPack connector carries I2C; the 6P6C Lego Mindstorms NXT connector carries I22C; a few people use the 8P8C connectors and CAT5 cable normally used for Ethernet physical layer to instead carry differential-encoded I2C signals or boosted single-ended I2C signals; and every HDMI and most DVI and VGA connectors carry DDC2 data over I2C.