USB Type-C 40 Gb/s Multi-Protocol Switch and Bi-Directional Bit-Level Retimer

The KB8001 is a USB Type-C™ 40 Gb/s Multiprotocol Switch and Bidirectional Bit-Level Retimer that supports transmitter FeedForward Equalization and adaptive receiver equalization. This compensates for frequencydependent cable and board trace loss up to 30 dB that can result in Inter-Symbol Interference. It requires adaptive RX equalization when the higher speed modes such as USB Super Speed, DP 1.4a, Thunderbolt 3, or other alternate modes need to travel across a PCB or cable.

All four lanes of the KB8001 are bidirectional. This makes it a versatile signal retimer applicable in both host (source) and device (sink) applications.

For host or device applications, the KB8001 enables the system to pass both transceiver compliance and receiver jitter tolerance tests for USB4 Gen 2,3, USB3.2 Gen 1,2 (Gen1x1, Gen1x2, Gen2x1, and Gen2x2), DP version 1.4a [(RBR 1.62 Gb/s, HBR3 8.1 Gb/s, HBR2 5.4 Gb/s, HBR 2.7 Gb/s and RBR 1.62 GBd) x1, x2, x4], Thunderbolt 2, 3 [(10.3125 Gb/s, 20.625 Gb/s) single lane operation, dual lane unbonded and dual-lane bonded operation].

A Two-Wire Interface (TWI) connects to the Power Delivery Microcontroller for initialization and configuration operations. The Sideband Use (SBU) interface carries sideband information used by the USB Type-C Alt M

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