electrical comm i2c

I²C

Inter-Integrated Circuit

Part of Communication Protocols.

Property
Use	Communication between microcontroller(s) and ICs/Sensor
Wires	2 - SCL (serial clock) and SDA (serial data)
Clock	Yes
Drive	Open drain
Bus	Yes
Data rate	100 kHz (standard), 400 kHz (fast mode), 1 MHz (fast mode plus), ...
Usual lengths	Usually within several directly connected PCBs, but can be longer depending on bus capacitance and data speed.

I²C stands for Inter-Integrated Circuit (and is pronounced eye-squared-sea).

Wiring

References:

• I²C wikipedia page