MAX3814_0709 Datasheet, PDF (1/13 Pages) Maxim Integrated Products – DVI/HDMI TMDS FR-4 and Cable Equalizer/Driver

19-0813; Rev 1; 9/07
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DVI/HDMI TMDS FR-4 and
Cable Equalizer/Driver
General Description
The MAX3814 TMDS^® EQ/driver IC compensates for
FR-4 and cable losses up to the DVI™/HDMI™ transmit
connector and provides a fully compliant DVI/HDMI
TMDS output. The device can also be used in DVI/HDMI
cable applications to extend reach and improve jitter
margin of cable channels at the receive-side connector.
The on-chip TMDS drivers operate at a standard cur-
rent level for implementing a typical DVI/HDMI non-
back-terminated transmitter, as well as a 50% higher
current mode for using a 200Ω back termination resis-
tor (nonmatching) to achieve a 10dB return loss.
Typical DVI/HDMI output drivers contribute to reflection
problems between the connector and a typical high-
impedance (open) DVI/HDMI Tx output. The selectable
output current (LEVEL pin) gives the option of partial
back termination (e.g., differentially connected 200Ω) to
mitigate the reflection problem effectively while keeping
common-mode offset to a minimum.
The 4-channel implementation treats all channels identi-
cally. To allow board layout flexibility for DVI and HDMI
connectors, which have different channel order, the
clock and data channels can be arbitrarily assigned.
The MAX3814 operates from a 3.3V power supply,
standard for DVI/HDMI applications, and is packaged
in a 5mm x 5mm x 0.1mm, 32-pin TQFP package.
Applications
Laptop PC TMDS Equalizer and Driver
Docking Station TMDS Equalizer and Driver
Cable TMDS Equalizer
Features
♦ Equalizes FR-4 Board Microstrip and Cable HF
Losses Up to 15dB at 825MHz for Operation at
0.25Gbps to 1.65Gbps
♦ Compatible with HDMI 1.3
♦ Less Than 0.2UI_P-P Residual Jitter at 1.65Gbps for
0 to 15dB Channel Loss at 825MHz
♦ Input Terminations: 50Ω (Each Side to V_CC) ±10%
♦ Output of Driver is a Fully DVI/HDMI TMDS-
Compatible Cable Driver
♦ Output Amplitude: 1.05V_P-P Differential
♦ Enable Pin to Select Normal Operation or Power-
Down Mode
♦ LEVEL Pin to Select Output Current for Use With
or Without Back Termination
♦ 32-Pin TQFP for Four Channels; Any Channel Can
Be Either a TMDS Data or Clock Signal
♦ V_CC = 3.3V; Signal Pins Have Absolute Max
Ratings of 5.5V (for Fault Conditions)
Ordering Information
PART
TEMP RANGE
PIN-
PACKAGE
MAX3814CHJ+ 0°C to +70°C 32 TQFP
+Denotes a lead-free package.
PKG
CODE
H32+1
Pin Configuration appears at end of data sheet.
Simplified Functional Diagram
TERMINATED TO V_CC
IND+/-
INC+/-
INB+/-
INA+/-
EQUALIZER
4
3
2
1
MAX3814
4
LIMITING
3
AMPLIFIER 2
1
4
OUTD+/-
3
OUTC+/-
2
OUTB+/-
DRIVER 1
OUTA+/-
ENABLE
LEVEL
OUTPUT LEVEL CONTROL
TMDS is a registered trademark of Silicon Image, Inc.
DVI is a trademark of Digital Display Working Group. HDMI is a trademark of HDMI Licensing, LCC.
________________________________________________________________ Maxim Integrated Products 1
For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,
or visit Maxim’s website at www.maxim-ic.com.