Data on the I2C-bus can be transferred at rates of up to 100 kbit/s in standard mode, up to 400 kbit/s in fast mode, and up to 3. A slow slave may stretch the clock period. Philips Semiconductors (now NXP Semiconductors) developed a simple bidirectional 2-wire bus for efficient inter-IC control, called the Inter-IC or I2C-bus. Only two bus lines are required: a serial data line (SDA) and a serial clock line (SCL). Serial, 8-bit oriented, bidirectional data transfers. In the era of 5G, AI, and high-speed data centers, optical modules serve as the core bridge for converting electrical signals to optical signals (and vice versa), enabling fast, reliable data transmission across networks. Later revisions of I 2 C can host more nodes and run at faster speeds (400 kbit/s fast mode, 1 Mbit/s fast mode. The I2C bus is a set of hardware and software rules that allows communication between multiple devices over a shared, two-wire interface. 4Mbps, though 400kHz is usually sufficient. Often referred as I²C, I2C, IIC (Inter-Integrated Circuit), MDIO (Management Data Input/Output) or CMIS (Common Management Interface Specification), these serial bus.
