TI-TMDS141.pdf
需积分: 9 39 浏览量
2023-02-07
23:09:58
上传
评论 4
收藏 1.56MB PDF 举报
TMDS
141
Interface
Unit
Audiovisual
Processing
Unit
HDMI
Rx
Digital TV
TMDS141
www.ti.com
SLLS737D –JUNE 2006– REVISED SEPTEMBER 2011
HDMI HIDER
Check for Samples: TMDS141
1
FEATURES
23
• Supports 2.25 Gbps Signaling Rate for up to
• 40-Pin QFN Package (RHA)
1080p Resolutions Supporting 36-bits Per
• ROHS Compatible and 260°C Reflow Rated
Pixel for Color Depth of 12-bits Per Color
• Accepts AC Couple DisplayPort Dual-Mode
• Compatible with HDMI 1.3a
Signals and Translates Them into a HDMI1.3a
• Integrated Receiver Termination Compatable TMDS Signal
• 8-dB Equalizer Compensates Losses from 5-m
APPLICATIONS
or Longer HDMI Cables
• Digital TV
• Selectable Output De-Emphasis Supports 1-m
HDMI Transmission
• DVD Player
• I
2
C™ Repeater Isolates Bus Capacitance at
• Set-Top-Box
Both Ends
• Audio Video Receiver
• High Impedance Outputs When Disabled
• Digital Projector
• TMDS Inputs HBM ESD Protection Exceeds
• DVI or HDMI cable
6 kV
• DisplayPort Level Translator
• 3.3-V Supply Operation
DESCRIPTION
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
signaling rates of up to 2.25-Gbps, and an I
2
C repeater to link extended display identification data (EDID) reading
and high-bandwidth digital content protection (HDCP) key exchange under I
2
C standard mode 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.
Figure 1. TYPICAL APPLICATION
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.
2PowerPAD is a trademark of Texas Instruments.
3I
2
C is a trademark of Philips Electronics.
PRODUCTION DATA information is current as of publication date.
Copyright © 2006–2011, 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.
剩余28页未读，继续阅读
资源评论
