Datasheet

DP++ MultiModeSourceSideRe-driver; GPU w/ UnifiedDDC & AUXOutputs;
AUXChannelMonitoredforLink Training
AUX
HPD
AUXSNK- AUXSNK+
SCL_CTL
SDA_CTL
GPU
MAIN[3:0]
DP connector
IN[3:0]
4 diff 4 diff
OUT[3:0]
HPD_SRC HPD_SNK
CAD CAD_SNK
SCL-
SDA+
SN75DP130
100kW
100kW
3.3V
CAD
DDC
1M
CAD_SRC
CAD
CAD
OptionalI
2
Cinterfacemaybeusedto
fullyconfigureoutputsignal
conditioningandEQsettings. 10kW
resistorsarerecommendedforR
I2C
.
MinimizeStubLineLength
DP OnlySourceSideRe-driver; Buffered AUXChannel (nostublines);
AUXChannelMonitoredforLink Training
AUX-
AUX+
HPD
GPU
MAIN[3:0]
4 diff
SCL-
SDA+
100n
100n
R
I2C
R
I2C
3.3V
AUXSRC-
AUXSRC+
DP Connector
IN[3:0]
4 diff
OUT[3:0]
HPD_SRC HPD_SNK
AUXSNK-
AUXSNK+
SN75DP130
100kW100kW
3.3V
100kWresistorsshallbeplacedonthe AUXSNKsideto
ensureproperdeviceinternalchannelbiasing, andto
ensurethesinkdeviceidentifiesthesourceduringpower
downconditions.
SCL_CTL
SDA_CTL
OptionalI
2
Cinterfacemaybeusedtofully
configureoutputsignalconditioningand
EQsettings. 10kW resistorsare
recommendedforR
I2C
.
CAD_SNK = V
IL
SN75DP130
SLLSE57D –APRIL 2011–REVISED JULY 2013 www.ti.com
APPLICATION INFORMATION
ADDITIONAL TYPICAL IMPLEMENTATIONS
Theconfiguration shown in Figure 22 is preferred to avoid very long AUX signal stub lines. Furthermore, this
configuration provides isolation between the DP connector and the GPU.
Figure 22. DP Only Configuration with AUX Pass Through
The configuration shown in Figure 23 enables the SN75DP130 in DP++ Dual-Mode with the AUX input only
monitoring the AUX channel. Use this setting when AUX stub lines can be kept short and minimum AUX
attenuation is desired. For DP v1.1a, the stub length shall not exceed 4cm each, and for DP v1.2 with FAUX
support each stub line shall be shorter than 1cm.
Figure 23. DP++ Dual-Mode Configuration with AUX Monitor
The alternate configuration shown in Figure 24 allows a reduced BOM by eliminating the need for external FET
switches while routing AUX and DDC externally, which eliminates any insertion loss cases of AUX is brought
through the SN75DP130. For DP v1.2 with FAUX support each stub line shall be shorter than 1cm.
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