MAX3814CHJ+T Fast Delivery |IC PHOENIX CO.,LIMITED

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MAX3814CHJ+T
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 200Ωback 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
FeaturesEqualizes FR-4 Board Microstrip and Cable HF
Losses Up to 15dB at 825MHz for Operation at
0.25Gbps to 1.65GbpsCompatible with HDMI 1.3Less Than 0.2UIP-P Residual Jitter at 1.65Gbps for
0 to 15dB Channel Loss at 825MHzInput Terminations: 50Ω(Each Side to VCC) ±10%Output of Driver is a Fully DVI/HDMI TMDS-
Compatible Cable DriverOutput Amplitude: 1.05VP-PDifferentialEnable Pin to Select Normal Operation or Power-
Down ModeLEVEL Pin to Select Output Current for Use With
or Without Back Termination32-Pin TQFP for Four Channels; Any Channel Can
Be Either a TMDS Data or Clock SignalVCC= 3.3V; Signal Pins Have Absolute Max
Ratings of 5.5V (for Fault Conditions)
MAX3814
DVI/HDMI TMDS FR-4 and
Cable Equalizer/Driver
TERMINATED TO VCC
IND+/-
INC+/-
INB+/-
INA+/-
OUTD+/-
OUTC+/-
OUTB+/-
OUTA+/-
ENABLE
LEVEL
OUTPUT LEVEL CONTROLMAX3814EQUALIZER
LIMITING
AMPLIFIER
DRIVER1
Simplified Functional Diagram
Ordering Information
PART TEMP RANGE PIN-PACKAGE
MAX3814CHJ+ 0°C to +70°C 32 TQFP
19-0813; Rev 2; 12/10
+Denotes a lead(Pb)-free/RoHS-compliant package.
TMDS is a trademark of Silicon Image, Inc.
DVI is a trademark of Digital Display Working Group.
EVALUATION KIT
AVAILABLE
Pin Configuration appears at end of data sheet.
MAX3814
DVI/HDMI TMDS FR-4 and
Cable Equalizer/Driver
ABSOLUTE MAXIMUM RATINGS
SPECIFICATION TABLES
(Typical values measured at VCC= 3.3V, TA= +25°C; external terminations = 50Ω±1%; min/max values valid over VCC= 3.3V
±0.3V, TA= 0°C to +70°C; with external terminations = 50Ω±1% to voltage = 3.3V ±0.7V. Tested at 1.65Gbps. AC parameters guar-
anteed by design and characterization.)
POWER SUPPLY
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to
absolute maximum rating conditions for extended periods may affect device reliability.
Termination-Supply Voltage Range.......................-0.5V to +4.0V
Signal Voltage Range on Any One Signal Wire ....-0.5V to +4.0V
CML Common-Mode Voltage Range on
Any I/O Pair (sustained).....................................-0.5V to +5.5V
CML Common-Mode Voltage Range on Any I/O Pair
(sustained, within VCCand GND)...-3.3V to +3.3V, Differential
CML Output Loading (termination)............................0Ωto Open
Operating Ambient Temperature Range................0°C to +70°C
Storage Ambient Temperature Range...............-40°C to +150°C
ESD Human Body Model, Any Pin.....................................2000V
Lead Temperature (soldering, 10s).................................+300°C
Soldering Temperature (reflow).......................................+260°C
PARAMETER CONDITIONS MIN TYP MAX UNITS
DC PARAMETERS
Supply Current 110 140 mA
OPERATING CONDITIONS
PARAMETERSYMBOLCONDITIONSMINTYPMAXUNITS
Supply Voltage VCC 3.0 3.3 3.6 V
Operating Ambient Temperature 0 25 70 °C
Data Rate 0.25 1.65 Gbps
Maximum Channel Loss At 825MHz, FR-4 microstrip compensate
on curve 15 dB
Source Output Rise/Fall Time 20% to 80%, measured at source
transmitter (input to channel) 240 ps
Differential Input-Voltage Swing Measured at source transmitter (input to
channel) 700 1050 1400 mVP-P
Maximum Supply Noise
Tolerance DC-5000kHz, all specifications maintained 50 mVP-P
TMDS EQUALIZER PERFORMANCE
PARAMETER CONDITIONS MIN TYP MAX UNITS
Residual Output Jitter (15 x
RJRMS + DJ) from 0.25Gbps to
1.65Gbps
Subtract source jitter for DJ, 0 to 15dB FR4 loss at
825MHz (Note 1) 0.2 UIP-P
MAX3814
DVI/HDMI TMDS FR-4 and
Cable Equalizer/Driver
SPECIFICATION TABLES (continued)
(Typical values measured at VCC= 3.3V, TA= +25°C; external terminations = 50Ω±1%; min/max values valid over VCC= 3.3V
±0.3V, TA= 0°C to +70°C; with external terminations = 50Ω±1% to voltage = 3.3V ±0.7V. Tested at 1.65Gbps. AC parameters guar-
anteed by design and characterization.)
CML INPUTS
PARAMETERCONDITIONSMINTYPMAXUNITS
DC PARAMETERS
Common-Mode Input VoltageVCC -
VCC +
100mV
Input Termination VoltageWhen disconnected from sourceVCC -
VCC +mV
Single-Ended Input TerminationWith 50Ω load, each side to VCC455055Ω
AC PARAMETERS
Differential Input Return Loss< 1.6GHz14dB
CML OUTPUTS
PARAMETERCONDITIONSMINTYPMAXUNITS
DC PARAMETERS
With 50Ω load, each side to VCC;
LEVEL = low90010501200
Differential Output-Voltage Swing
With 50Ω load, each side to VCC;
LEVEL = high; 200Ω back termination90010501200
mVP-P
Single-Ended High Output
VoltageLEVEL = lowVCC -
VCC +mV
Single-Ended Low Output
VoltageLEVEL = lowVCC -
VCC -
400mV
Output Voltage When ENABLE
DisabledLEVEL = low, ENABLE = highVCC -
VCC +mV
AC PARAMETERS
Output, Rise/Fall Time20% to 80%; with 50Ω load,
each side to VCC80170230ps
Typical Operating Characteristics
(VCC= +3.3V, TA= +25°C, unless otherwise noted. Residual jitter is measured directly from the eye diagram histogram after 5000 hits.)
MAX3814
DVI/HDMI TMDS FR-4 and
Cable Equalizer/Driver
Note 1:The specified FR-4 loss is from 12-mil traces, 7-mil spacing, and 6-mil depth (Prepreg) with no solder mask. The test pattern
is a 27 - 1, 20 zeros, inverted 27 -1, and 20 ones.
LVTTL/LVCMOS AND OPEN-COLLECTOR LVTTL
PARAMETER CONDITIONS MIN TYP MAX UNITS
DC PARAMETERS
LVTTL Input High Voltage 2.0 V
LVTTL Input Low Voltage 0.8 V
LVTTL Input High Current -100 +100 μA
LVTTL Input Low Current -100 +100 μA
POWER-SUPPLY CURRENT
vs. TEMPERATURE
MAX3814 toc01
TEMPERATURE (°C)
POWER-SUPPLY CURRENT (mA)5040302010
LEVEL = HIGH
LEVEL = LOW
MAX3814 INPUT: EYE DIAGRAM OF
1.65Gbps DATA AFTER 80in OF FR-4
MAX3814 toc02
100ps/div
140mV
P-P
/div
MAX3814 toc03
MAX3814 OUTPUT: EYE DIAGRAM OF MAX3814
EQUALIZING 1.65Gbps DATA AFTER 80in OF FR-4
100ps/div
140mV
P-P
/div
SPECIFICATION TABLES (continued)
(Typical values measured at VCC= 3.3V, TA= +25°C; external terminations = 50Ω±1%; min/max values valid over VCC= 3.3V
±0.3V, TA= 0°C to +70°C; with external terminations = 50Ω±1% to voltage = 3.3V ±0.7V. Tested at 1.65Gbps. AC parameters guar-
anteed by design and characterization.)
MAX3814
DVI/HDMI TMDS FR-4 and
Cable Equalizer/Driver
MAX3814 toc04
MAX3814 OUTPUT: 1.65Gbps DATA AFTER
30ft OF TENSOLITE 28 AWG CABLE
100ps/div
140mV
P-P
/div
MAX3814 toc05
MAX3814 OUTPUT: 250Mbps DATA AFTER
30ft OF TENSOLITE 28 AWG CABLE
100ps/div
140mV
P-P
/div
MAX3814 OUTPUT: 2.25Gbps DATA AFTER
33ft OF 24 AWG SPECTRA STRIP CABLE
MAX3814 toc06
74ps/div
125mV/div
Typical Operating Characteristics (continued)
(VCC= +3.3V, TA= +25°C, unless otherwise noted. Residual jitter is measured directly from the eye diagram histogram after 5000 hits.)
SINGLE-ENDED/DIFFERENTIAL INPUT
RETURN LOSS (S11/SDD11)
MAX3814 toc07
FREQUENCY (MHz)
GAIN (dB)
(INPUT SIGNAL LEVEL = 0dBm)
(OUTPUT DISABLED)
SDD11
S11
DETERMINISTIC JITTER vs.
LENGTH OF FR-4 BOARD
MAX3814 toc08
LENGTH OF FR-4 (in)
DJ (ps)8070605040302010
(SOURCE SIGNAL LEVEL = 700mVP-P/1200mVP-P,
DATA RATE = 0.825Gbps AND 1.65Gbps,
LOSS = 0.209dB/in AT 820MHz)
700mVP-P
1200mVP-P
1.65Gbps
825Mbps
700mVP-P
DETERMINISTIC JITTER vs.
LENGTH OF 24 AWG CABLE
MAX3814 toc09
LENGTH OF 24 AWG CABLE (ft)
DJ (ps)30252015105
1.65Gbps
(SOURCE SIGNAL LEVEL = 700mVP-P,
DATA RATE = 1.65Gbps AND 2.25Gbps,
CABLE LOSS = 0.261dB/ft AT 1.12GHz)
2.25Gbps
DETERMINISTIC JITTER
FOR 28 AWG TWIN AX CABLE
MAX3814 toc10
LENGTH OF TWIN AX CABLE (ft)
DJ (ps)302010
VIN = 700mVP-P
VIN = 1200mVP-P
(SOURCE SIGNAL LEVEL = 700mVP-P/1200mVP-P,
DATA RATE = 1.65Gbps,
LOSS = 0.358dB/ft AT 820MHz)
RESIDUAL JITTER DUE TO POWER-SUPPLY
SINUSOIDAL NOISE
MAX3814 toc11
NOISE FREQUENCY (MHz)
RESIDUAL JITTER (ps)10.10.01
NO NOISE
50mV NOISE
(SOURCE SIGNAL LEVEL = 700mVP-P,
NOISE SIGNAL LEVEL = 50mVP-P,
DATA RATE = 1.65Gbps, 60in FR-4)
RESIDUAL JITTER
MAX3814 toc12
INPUT SIGNAL LEVEL (mVP-P)
RESIDUAL JITTER (ps)
(SOURCE SIGNAL LEVEL = 300mVP-P TO 1800mVP-P,
DATA RATE = 1.65Gbps, 60in OF FR-4 BOARD,
FR-4 LOSS = 12.61dB AT 820MHz)
MAX3814
DVI/HDMI TMDS FR-4 and
Cable Equalizer/Driver
Pin Description
PINNAMEFUNCTION
1, 8, 17, 24 N.C. No Connection. Not internally connected. INB+ Positive TMDS Input, CML INB- Negative TMDS Input, CML
4, 5, 9, 32 VCC Power Supply. All pins must be connected to VCC.INC+ Positive TMDS Input, CML INC- Negative TMDS Input, CML
10 IND+ Positive TMDS Input, CML
11 IND- Negative TMDS Input, CML ENABLE Active-Low Enable Input, LVTTL. High to disable, outputs off. Low to enable, outputs on.
13, 16, 20, 21,
25, 28 VEE Negative Power Supply (Ground)
14 OUTD- Negative TMDS Output, CML
15 OUTD+ Positive TMDS Output, CML
18 OUTC- Negative TMDS Output, CML
19 OUTC+ Positive TMDS Output, CML
22 OUTB- Negative TMDS Output, CML
23 OUTB+ Positive TMDS Output, CML
26 OUTA- Negative TMDS Output, CML
27 OUTA+ Positive TMDS Output, CML
29 LEVEL Output Current Level Control, LVTTL. Low for 10mA output currents. High for 15mA currents.
Used for 200 back differential termination resistors.
30 INA+ Positive TMDS Input, CML
31 INA- Negative TMDS Input, CML
MAX3814
DVI/HDMI TMDS FR-4 and
Cable Equalizer/Driver
DRIVEREQUALIZERLIMITING
AMPLIFIER
TERMINATED
TO VCC
DRIVEREQUALIZERLIMITING
AMPLIFIER
TERMINATED
TO VCC
DRIVEREQUALIZER
EQUALIZER
LIMITING
AMPLIFIER
TERMINATED
TO VCC
DRIVERLIMITING
AMPLIFIER
TERMINATED
TO VCC
OUTD+/-
LEVEL
OUTPUT LEVEL CONTROL
OUTC+/-
OUTB+/-
OUTA+/-INA+/-
INB+/-
INC+/-
IND+/-
ENABLE
MAX3814
Detailed Description
The MAX3814 TMDS equalizer/driver accepts differential
CML input data rates from 250Mbps to 1.65Gbps. It con-
sists of four differential CML input buffers, four indepen-
dent fixed equalizers, four limiting amplifiers, and four
differential CML output buffers (Figure 1). The MAX3814
functions both as an equalizer and as a driver.
As an equalizer the MAX3814 automatically adjusts for
attenuation levels up to 16dB at 825MHz from either
dielectric board losses or skin-effect losses in copper
cable.
As a driver the MAX3814 provides CML outputs. The
CML output is normally open (i.e., no back termination)
and is DC-coupled by transmission line to a termination
at the far end per DVI/HDMI standards. The MAX3814
provides nominally 10mA output-switching currents.
However, with the MAX3814, there is a selectable higher
current drive to accommodate a differential 200Ωback
termination resistor while maintaining the differential
swing of 1000mVP-P. This 200Ωback termination resistor
serves to dampen signal reflections returning to the
device from discontinuities in the channel such as DVI or
HDMI connectors, providing a 10dB return loss.See the
CML Inputs and Outputssection for more information.
Figure 1. Functional Diagram

Partno	Mfg	Dc	Qty	Available	Descript
MAX3814CHJ+T \|MAX3814CHJT	MAXIM	N/a	5000	avai	DVI/HDMI TMDS FR-4 and Cable Equalizer/Driver