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SN75DP126DSRHUR Datasheet(PDF) 2 Page - Texas Instruments

Part # SN75DP126DSRHUR
Description  DisplayPort??1:2 Re-Driver Switch with TMDS Translator
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Manufacturer  TI1 [Texas Instruments]
Direct Link  http://www.ti.com
Logo TI1 - Texas Instruments

SN75DP126DSRHUR Datasheet(HTML) 2 Page - Texas Instruments

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GPU w/ Unified DDC &
AUX Channels
HPD
AUX_SRCp
AUX_SRCn
SCL_SRC
SDA_SRC
GPU
MAIN[3:0]
IN[3:0]
4 diff
4 diff
DP_OUT[3:0]
HPD_SRC
DP_HPD_SNK
AUX_SNK
CAD_SNK
SN75DP126
1M
Optional I2C interface may be used to fully configure output signal conditioning
and EQ settings. 10kW resistors are recommended for RI2C.
100kW
100kW
3.3V
100kWresistors shall be placed on the AUX_SNK 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
2C
RI2C
RI2C
3.3V
CAD
CAD_SRC
4 diff
TMDS_OUT[2:0]
SCL_SNK
SDA_SNK
TMDS_CLK
2kW
3.3V
AUX
DDC
2kW
SN75DP126
SLLSEA9A – FEBRUARY 2012 – REVISED MARCH 2012
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.
DESCRIPTION (CONTINUED)
The SN75DP126 offers separate AUX and DDC source interfaces that connect to the DisplayPort AUX sink
channel and the HDMI DDC sink channel, that seamlessly interface to graphics processor (GPU) comprising
separate DDC and AUX interfaces as well as GPUs with combined DDC/AUX. Other sideband circuits such as
Hot Plug Detect (HPD) are optimized to reduce external components providing a seamless connection to Intel,
AMD, and NVIDIA graphics processors.
The SN75DP126 is optimized for mobile applications, and contains activity-detection circuitry on the DP++ Main
Link input that transitions to a low-power Output Disable mode in the absence of a valid input signal. Other low
power modes are supported, including a Standby mode with typical dissipation of ~2 mW when no video sink (for
example, monitor) is connected.
The device is characterized for an extended operational temperature range from 0°C to 85°C.
TYPICAL IMPLEMENTATIONS
The SN75DP126 supports graphics processors with unified AUX/DDC configurations, where the source AUX
channel is multiplexed with the source DDC channel, as illustrated in Figure 1.
Graphics processors with separate AUX and DDC channels (ie. non-unified) are also supported, where the
separate channels are directly routed to the separate channels on the SN75DP126, maintaining the AC coupling
on the AUX channel. In the non-unified configuration, it is recommended to implement 2-k
Ω pull-up resistors on
the source-side DDC channel. See Figure 2.
Figure 1. GPU with a Unified AUX/DDC Configuration
2
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Copyright © 2012, Texas Instruments Incorporated
Product Folder Link(s): SN75DP126


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