Automotive-compliant active crossbar mux simplifies smart-cockpit connectivity

Diodes Incorporated has introduced its automotive-compliant 10Gbps 6:4 active crossbar mux with a linear ReDriver. The compact PI3DPX1225Q switches USB 3.2 and DisplayPort 2.1 signals via a USB Type-C connector and delivers low-latency connectivity with high signal integrity for smart cockpits and rear-seat entertainment systems.

The device supports three operating modes: it can connect one lane of USB 3.2 Gen 2 to the USB Type-C connector, one lane of USB 3.2 Gen 2 and two channels of DP 2.1 UHBR10, or four channels of DP 2.1 UHBR10. The device also incorporates an AUX listener and, in compliance with the USB Type-C standard, swaps the AUX channels when a flipped cable is detected.

For each USB 3.2 Gen 2 and DP 2.1 UHBR10 operating modes, the differential signals can be easily adjusted with continuous time linear equalisation (CTLE). Output compression swing (-1dB) and flat-gain values are controlled by the I2C setting. By reducing intersymbol interference (ISI) jitter, the 10Gbps signal performance is optimised over various physical mediums. Linear equalisation does not block the decision feedback equaliser (DFE) receiver’s adaptive channel controls – this supports DP 2.1 transparent link training (LT) without dependency on the DP-AUX channels listener.