19-0813; Rev 1; 9/07
KIT
ATION
EVALU
BLE
AVAILA
DVI/HDMI TMDS FR-4 and
Cable Equalizer/Driver
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 current level for implementing a typical DVI/HDMI nonback-terminated transmitter, as well as a 50% higher
current mode for using a 200Ω back termination resistor (nonmatching) to achieve a 10dB return loss.
Typical DVI/HDMI output drivers contribute to reflection
problems between the connector and a typical highimpedance (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 identically. 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.
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 0.2UIP-P Residual Jitter at 1.65Gbps for
0 to 15dB Channel Loss at 825MHz
♦ Input Terminations: 50Ω (Each Side to VCC) ±10%
♦ Output of Driver is a Fully DVI/HDMI TMDSCompatible Cable Driver
♦ Output Amplitude: 1.05VP-P Differential
♦ Enable Pin to Select Normal Operation or PowerDown 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
♦ VCC = 3.3V; Signal Pins Have Absolute Max
Ratings of 5.5V (for Fault Conditions)
Ordering Information
PART
TEMP RANGE
MAX3814CHJ+
0°C to +70°C
Applications
Laptop PC TMDS Equalizer and Driver
PINPACKAGE
PKG
CODE
32 TQFP
H32+1
Docking Station TMDS Equalizer and Driver
+Denotes a lead-free package.
Cable TMDS Equalizer
Pin Configuration appears at end of data sheet.
Simplified Functional Diagram
TERMINATED TO VCC
IND+/4
INB+/INA+/-
OUTD+/-
4
INC+/3
EQUALIZER
2
1
4
2
3
LIMITING
AMPLIFIER
2
OUTC+/-
3
DRIVER 1
OUTB+/OUTA+/-
1
ENABLE
MAX3814
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.
MAX3814
General Description
The MAX3814 TMDS® EQ/driver IC compensates for
