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 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 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 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.
Key Features
Applications/Uses
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 TMDS-Compatible Cable Driver
Output Amplitude: 1.05VP-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
VCC = 3.3V; Signal Pins Have Absolute Max Ratings of 5.5V (for Fault Conditions)
Cable TMDS Equalizer
Docking Station TMDS Equalizer and Driver
Laptop PC TMDS Equalizer and Driver
Key Specifications:
Digital Video Equalizers/Drivers
Notes: **This pricing is BUDGETARY, for comparing similar parts. Prices are in
U.S. dollars and subject to change. Quantity pricing may vary
substantially and international prices may differ due to local
duties, taxes, fees, and exchange rates. For volume-specific prices
and delivery, please see the price and availability page
or contact an authorized distributor.
* Some packages have variations, listed on the drawing. "PkgCode/Variation" tells which variation the product uses. Note that "+", "#", "-" in the part number suffix describes RoHS status. Package drawings may show a different suffix character.
Devices:
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MAX3814
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Package:
TYPE PINS FOOTPRINT
DRAWING CODE/VAR *
Temp
RoHS/Lead-Free? Materials Analysis
MAX3814CHJ+
TQFP;32 pin;
Dwg: 21-0110 (PDF)
Use pkgcode/variation: H32+1*
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