Datasheet

DP++ MultiModeSourceSideRe-driver; GPUw/ SeparateDDC & AUXOutputs;
AUX & DDCInternalMuxUtilized; AUXChannelMonitoredforLink Training
AUX
HPD
GPU
MAIN[3:0]
4 diff
DDC
R
DDC
R
DDC
3.3V
I
2
C
R
I2C
R
I2C
3.3V
AUXSRC-
AUXSRC+
DDC
DP Connector
IN[3:0]
4 diff
OUT[3:0]
HPD_SRC HPD_SNK
AUXSNK-
AUXSNK+
CAD_SNK
SN75DP130
1M
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
TheuseofR
DDC
isoptional. TheSN75DP130
integrates 60kW pullupsandacableadapter
shouldinclude 2kW pullupforeachline. Ifitis
uncertainifthecableadapterincludes 2kW
pullupresistance, use 10kW forR
DDC
.
OptionalI
2
Cinterfacemaybeusedto
fullyconfigureoutputsignal
conditioningandEQsettings. 10kW
resistorsarerecommendedforR
I2C
.
DP++ MultiMode Source Side Re-driver; GPU w/ Unified DDC & AUX Outputs;
AUX & DDC Internal Mux Utilized; AUX Channel Monitored for Link Training
HPD
AUXSRC-
AUXSRC+
DDC
GPU
MAIN[3:0]
DP Connector
IN[3:0]
4 diff 4 diff
OUT[3:0]
HPD_SRC HPD_SNK
AUXSNK-
AUXSNK+
CAD_SNK
SN75DP130
1M
Optional I
2
C interface may be used to fully
configure output signal conditioning and
EQ settings. 10kW resistors are
recommended for R
I2C
.
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
I
2
C
R
I2C
R
I2C
3.3V
AUX
DDC
SN75DP130
SLLSE57D –APRIL 2011–REVISED JULY 2013 www.ti.com
These devices have limited built-in ESD protection. The leads should be shorted together or the device placed in conductive foam
during storage or handling to prevent electrostatic damage to the MOS gates.
TYPICAL IMPLEMENTATIONS
The configuration shown in Figure 1 supports a GPU with unified AUX/DDC interfaces. This circuit provides back
current protection into the GPU AUX, HPD, and CAD inputs.
Figure 1. DP++ Dual-Mode in a Unified AUX/DDC Configuration
The configuration shown in Figure 2 supports a GPU with separate DDC and AUX interfaces, and overcomes the
need for an external AUX to DDC switch. This circuit provides back current protection into the GPU AUX, HPD,
and CAD inputs.
Figure 2. DP++ Dual-Mode in a Split AUX and DDC Configuration
2 Submit Documentation Feedback Copyright © 2011–2013, Texas Instruments Incorporated
Product Folder Links: SN75DP130