HD3SS460 Datasheet, PDF (13/34 Pages) Texas Instruments – 4 x 6 Channels USB Type-C Alternate Mode MUX

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9 Application and Implementation
HD3SS460
SLLSEM7B – JANUARY 2015 – REVISED JUNE 2016
NOTE
Information in the following applications sections is not part of the TI component
specification, and TI does not warrant its accuracy or completeness. TI’s customers are
responsible for determining suitability of components for their purposes. Customers should
validate and test their design implementation to confirm system functionality.
9.1 Application Information
HD3SS460 can be utilized for a wide range of muxing needs. This is general purpose passive cross-point switch.
The channels have independent adaptive common mode tracking allowing flexibility. As long as recommended
electrical use conditions are met the device can be used number of ways as described in Table 1.
NOTE
HD3SS460 does not provide common mode biasing for the channel. Therefore it is
required that the device is biased from either side for all active channels.
9.2 USB SS and DP as Alternate Mode
HD3SS460 can be used USB Type-C ecosystem with DP as alternate mode in two distinct application
configurations – one is for DP Source/USB Host, the other one for the DP Sink/USB Device/Dock. Figure 3 and
Figure 4 illustrate typical application block diagrams for these two cases. Detail schematics are illustrated in
Detailed Design Procedure section. Other applications and or use cases possible where these examples can be
used as general guidelines.
Figure 3 and Figure 4 depict the AC coupling capacitor placement examples. TI recommends placing the
capacitors as shown in the illustrations for the backward compatibility and interoperability purposes as some of
the existing USB systems may present Vcm, exceeding the typical range of 0–2 V on SS differential pairs.
USB3 Host
ML0+
ML0>
ML3+
ML3>
ML1+
ML1>
ML2+
ML2>
No AC Coupling Caps
SSTX SSRX
HD3SS460
RX1+
RX1>
TX1+
TX1>
TX2+
TX2>
RX2+
RX2>
0.1 µF
0.1 µF
Copyright © 2016, Texas Instruments Incorporated
Figure 3. Block Diagram for a Type C Interface Using DP as Alternate Mode – Source/Host
Copyright © 2015–2016, Texas Instruments Incorporated
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