TMDS442 Datasheet, PDF (1/45 Pages) Texas Instruments – 4-TO-2 DVI/HDMI SWITCH

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TMDS442
SLLS757A – AUGUST 2006 – REVISED MARCH 2007
4-TO-2 DVI/HDMI SWITCH
FEATURES
• A 4-to-2 Single-Link or 2-to-1 Dual-Link
DVI/HDMI Physical Layer Switch
• 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
• Integrated Receiver Terminations
• 8-dB Receiver Equalizer Compensates for
Losses From Standard HDMI Cables
• Selectable Output De-Emphasis Compensates
for Losses From Flat Cables
• High-Impedance Outputs When Disabled
• I²C Repeater Isolates Bus Capacitance at Both
Ends
• TMDS Inputs HBM ESD Protection Exceeds 6
kV
• 3.3-V Supply Operation
• 128-Pin TQFP Package
• ROHS Compatible and 260°C Reflow Rated
APPLICATIONS
• Digital TV
• Digital Projector
• Audio Video Receiver
• DVI or HDMI Switch
DESCRIPTION
The TMDS442, 4-to-2 port DVI/HDMI switch, allows up to 4 digital video interface (DVI) or high-definition
multimedia interface (HDMI) ports to be switched to two independent display blocks. The essential requirement
of picture-in-picture display from two digital audiovisual sources is having two individual DVI or HDMI receivers
in a digital display system. TMDS442 supports two DVI or HDMI receivers to enable multiple-source selection
(picture-in-picture), as well as supports acting as a 4-input 1-output video switch.
Each input or output port contains one 5-V power indicator (5V_PWR), one hot plug detector (HPD), a pair of I²C
interface signals (SCL/SDA), and four TMDS channels supporting data rates up to 2.25 Gbps. The 5-V power
indicator and the hot plug detector are pulled down with internal resistors, forcing a low state on these pins until
receiving a valid high signal. The I²C interface is constructed by an I²C repeater circuit to isolate the capacitance
form both ends of the buses. TMDS receivers integrate 50-Ω termination resistors pulled up to V_CC, which
eliminates the need for external terminations. An 8-dB input equalization cooperates to each TMDS receiver
inputs to optimize system performance through 5-meter or longer DVI or HDMI compliant cables.
Game
Machine
TYPICAL APPLICATION
Digital TV
STB
DVD Player or DVR
High Definition DVD Player
TMDS
442
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.
PowerPAD is a trademark of Texas Instruments.
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