HD3SS215 Datasheet, PDF (18/32 Pages) Texas Instruments – 6.0 Gbps HDMI DisplayPort 2:1/1:2 Differential Switch

HD3SS215, HD3SS215I
SLAS971D – MAY 2014 – REVISED OCTOBER 2015
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9.2.2.2 Detailed Design Procedure
The HD3SS215 is designed to operate with a 3.3 V power supply. Levels above those listed in the Absolute
Ratings table should not be used. If using a higher voltage system power supply, a voltage regulator can be used
to step down to 3.3 V. Decoupling capacitors may be used to reduce noise and improve power supply integrity.
Pull-up resistors to 5 V must be placed on the source side DDC clock and data lines according to the HDMI2.0
Standard. A weak pull down resistor should be placed on the source side HPD line. This is to ensure the source
can differentiate between when HPD is disconnected or at a high voltage level. The AUX_SEL and Dx_SEL
control pins should be set according to the application and desired muxing.
9.2.3 HDMI 2:1 Sink Application Using the RTQ Package
The HD3SS215 can be placed in applications needing to switch between two HDMI connectors and one Generic
HDMI sink.
AUX_SEL and Dx_SEL configured for A to C
Figure 8. HDMI 2:1 Sink Application Using the RTQ Package
NOTE
According to the HDMI specification the DDC 2-kΩ pullup resistors can be replaced by
47-kΩ pullups. Figure 8 schematic and Figure 11 PCB layout example shows 47-kΩ pullup
resistors.
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