TMDS341A_07 Datasheet, PDF (1/27 Pages) Texas Instruments – 3-TO-1 DVI/HDMI SWITCH

TMDS341A
www.ti.com
3-TO-1 DVI/HDMI SWITCH
SLLS702B – MAY 2006 – REVISED MARCH 2007
FEATURES
• Compatible with HDMI 1.3a
• Supports 2.25 Gbps Signaling Rate for 480i/p,
720i/p, and 1080i/p Resolutions up to 12-Bit
Color Depth
• Each Port Supports HDMI or DVI Inputs
• Isolated Digital Display Control (DDC) Bus for
Unused Ports
• 5-V Tolerance to all DDC and HPD_SINK
Inputs
• Integrated Receiver Termination
• Inter-Pair Output Skew < 100 ps
• Intra-Pair Skew < 50 ps
• 8-dB Receiver Equalization to Compensate for
5-m DVI Cable Losses
• High Impedance Outputs When Disabled
• TMDS Inputs HBM ESD Protection
Exceeds 5 kV
• 3.3-V Supply Operation
• 80-Pin TQFP Package
• ROHS Compatible and 260°C Reflow Rated
APPLICATIONS
• Switching From Three Digital-Video (DVI) or
Digital-Audio Visual (HDMI) Sources
• Digital TV
• Digital Projector
• Audio Video Receiver
DESCRIPTION
The TMDS341A is a 3-port digital video interface (DVI) or high-definition multimedia interface (HDMI) switch that
allows up to 3 DVI or HDMI ports to be switched to a single display terminal. Four TMDS channels, one hot plug
detector, and an I²C interface are supported on each port. Each TMDS channel allows signaling rates up to 2.25
Gbps.
The active source is selected by configuring source selectors, S1, S2, and S3. The selected TMDS inputs from
each port are switched through a 3-to-1 multiplexer. The I²C interface of the selected input port is linked to the
I²C interface of the output port, and the hot plug detector (HPD) of the selected input port is output to
HPD_SINK. For the unused ports, the I²C interfaces are isolated, and the HPD pins are kept low.
Termination resistors (50-Ω), pulled up to V_CC, are integrated at each receiver input pin. External terminations
are not required. A precision resistor is connected externally from the VSADJ pin to ground for setting the
differential output voltage to be compliant with the TMDS standard. When the output is connected to a standard
TMDS termination and OE is high, the output is high impedance.
The TMDS341A provides fixed 8-dB input equalization and selectable 3-dB output de-emphasis to optimize
system performance through 5-meter or longer DVI compliant cables. The device is characterized for operation
from 0°C to 70°C.
Typical Application
DVD Player
PC
or
Game
Machine
STB
Digital TV
TMDS
341A
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.
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 © 2006–2007, Texas Instruments Incorporated