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FEATURES

APPLICATIONS

DESCRIPTION

TMDS

141

Interface

Unit

Audiovisual

Processing

Unit

HDMI

Rx

Digital TV

TMDS141

SLLS737B – JUNE 2006 – REVISED APRIL 2007

HDMI HIDER

• High Impedance Outputs When Disabled

• Supports 2.25 Gbps Signaling Rate for 480i/p,

• TMDS Inputs HBM ESD Protection Exceeds 6

720i/p, and 1080i/p Resolution to 12-Bit Color

kV

Depth

• 3.3-V Supply Operation

• Compatible with HDMI 1.3a

• 40-Pin QFN Package (RHA)

• Integrated Receiver Termination

• ROHS Compatible and 260°C Reflow Rated

• 8-dB Equalizer Compensates Losses from 5-m

or Longer HDMI Cables

• Digital TV

• Selectable Output De-Emphasis Supports 1-m

HDMI Transmission

• DVD Player

• Set-Top-Box

Ends

• Audio Video Receiver

• Digital Projector

• DVI or HDMI cable

The TMDS141 HDMI hider is designed to accommodate a 1-m HDMI cable between a HDMI connector and a

receiver. The internal cable causes signal distortion to high-speed TMDS signals, as well as increasing

capacitance to the DDC channel. Each TMDS141 contains four TMDS repeaters to transmit digital content with

operations.

The device includes four TMDS compliant differential receivers with 50-

Ω termination resistors and 3.3-V

termination voltage integrated at each receiver input pin. External terminations are not required. A built-in

frequency response equalization circuit, 8 dB at 825 MHz, compensates inter-symbol interference (ISI) losses

from a 5-m or longer input cable link.

The device also includes four TMDS compliant differential drivers. 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.

A selectable de-emphasis circuit is available via the PRE input to drive long PCB traces or cables. When PRE is

high, the 3.5-dB high frequency gain offsets the losses due to the FR4 trace. PRE can be left open or kept low

when the de-emphasis function is not desired.

TYPICAL APPLICATION

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.

Copyright © 2006–2007, Texas Instruments Incorporated

Products conform to specifications per the terms of the Texas

Instruments standard warranty. Production processing does not

necessarily include testing of all parameters.