SN75DP126 Datasheet, PDF (1/41 Pages) Texas Instruments – DisplayPort™ 1:2 Re-Driver Switch with TMDS Translator

SN75DP126
www.ti.com
SLLSEA9A – FEBRUARY 2012 – REVISED MARCH 2012
DisplayPort™ 1:2 Re-Driver Switch with TMDS Translator
Check for Samples: SN75DP126
FEATURES
1
•2 One Dual-Mode DisplayPort™ (DP++) Input;
Switchable to One DP++ Output or One TMDS
Output Compatible with HDMI 1.4b and DVI
• Supports DP v1.1a and DP v1.2 Signaling
Including HBR2 Data Rates to 5.4 Gbps
• Supports HDMI 1.4b with TMDS Clock
Frequencies up to 340 MHz with 10 m Cable
• Glue-less interface to AMD, Intel, and NVIDIA
Graphics Processors
• Auto-Configuration Through Link Training for
DisplayPort Connection
• Integrated DDC-Accessible DP-HDMI Adaptor
ID for HDMI/DVI Sink Recognition
• Output Signal Conditioning with Tunable
Voltage Swing and Pre-Emphasis Gain for
both DisplayPort and TMDS Outputs
• Highly-Configurable Input-Variable Equalizer
• Two Device Options Including a Dual Power-
Supply Configuration for Lowest Power
• 2-kV ESD HBM Protection
• Temperature Range: 0°C to 85°C
• 56-Pin 5 mm x 11 mm QFN Package
APPLICATIONS
• Notebook PC
• Desktop PC
• PC Docking Station
• PC Standalone Video Card
DESCRIPTION
The SN75DP126 switches one Dual-Mode DisplayPort (DP++) input to one Dual-Mode DisplayPort (DP++) sink
output or one HDMI/DVI sink output. The HDMI/DVI output has a built-in level translator compliant with DVI 1.0
and HDMI 1.4b standard TMDS signaling, and is specified up to a maximum data rate of 3.4 Gbps, supporting
resolutions greater than 1920 X 1440 and HDTV deep color at 1080p. An integrated DP-HDMI Adaptor ID buffer
can be accessed when the HDMI/DVI sink is selected to indicate support for HDMI signaling.
The device compensates for PCB-related frequency loss and switching-related loss to provide the optimum
electrical performance from source to sink. The DP++ Main Link signal inputs feature-configurable equalizers
with selectable boost settings.
At the SN75DP126 DP++ Main Link output, four primary levels of differential output voltage (V_OD) swing and four
primary levels of pre-emphasis are available as well as a secondary level of boost adjustment, programmed
through I²C, for fine-tuning the Main Link output. The device can monitor the AUX channel and automatically
adjust output signaling levels and input equalizers based on DP Link Training commands.
At the SN75DP126 HDMI/DVI output, the differential output voltage swing and pre-emphasis levels are
configurable. The SN75DP126 output signal conditioning and EQ parameters are programmable through the I²C
interface, the VSadj terminal, and the I2C_CTL_EN terminal. The HDMI/DVI sink TMDS output slew rate is
controlled by the SRC control input.
1
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
DisplayPort is a trademark of VESA Standards Association.
2
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
Copyright © 2012, Texas Instruments Incorporated