HD3SS3212_15 Datasheet, PDF (11/25 Pages) Texas Instruments – HD3SS3212x Two-Channel Differential 2:1/1:2 USB3.1 Mux/Demux

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Application Information (continued)
HD3SS3212, HD3SS3212I
SLASE74A – MAY 2015 – REVISED AUGUST 2015
0.1 µF
TX
System/Host
controller
RX
Port B
Port C
Port B
Port C
0.1 µF
0.1 µF
RX
Device/
Endpoint
TX
RX
Device/
Endpoint
TX
Figure 5. AC Coupling Capacitors on Host TX and Endpoint TX
In the case where the common mode voltage in the system is higher than 2 V, the coupling capacitors are placed
on both sides of the switch (shown in Figure 6). A biasing voltage of <2 V is required in this case.
TX
System/Host
controller
V _BIAS
V _BIAS
Port B
Port C
Port B
RX
Device/
Endpoint
TX
RX
RX
Port C
Device/
Endpoint
TX
V_BIAS can be GND
Capacitor and resistor values depend upon application
Figure 6. AC Coupling Capacitors on Both Sides of Switch
The HD3SS3212 can be used with the USB Type C connector to support the connector’s flip ability. Figure 7
provides the generic location for the AC coupling capacitors for this application.
Copyright © 2015, Texas Instruments Incorporated
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