Download MAX3814.pdf

19-0813; Rev 2; 12/10
KIT
ATION
EVALU
E
L
B
AVAILA
DVI/HDMI TMDS FR-4 and
Cable Equalizer/Driver
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 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
Applications
Laptop PC TMDS Equalizer and Driver
TEMP RANGE
PIN-PACKAGE
0°C to +70°C
32 TQFP
MAX3814CHJ+
+Denotes a lead(Pb)-free/RoHS-compliant package.
Docking Station TMDS Equalizer and Driver
Pin Configuration appears at end of data sheet.
Cable TMDS Equalizer
Simplified Functional Diagram
TERMINATED TO VCC
IND+/INC+/-
4
INB+/INA+/-
OUTD+/-
4
3
EQUALIZER
2
1
2
3
LIMITING
AMPLIFIER
DRIVER 1
2
OUTC+/-
3
4
OUTB+/OUTA+/-
1
ENABLE
MAX3814
LEVEL
OUTPUT LEVEL CONTROL
TMDS is a trademark of Silicon Image, Inc.
DVI is a trademark of Digital Display Working Group.
HDMI is a registered trademark and registered service mark 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.
www.BDTIC.com/maxim
MAX3814
General Description
MAX3814
DVI/HDMI TMDS FR-4 and
Cable Equalizer/Driver
ABSOLUTE MAXIMUM RATINGS
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 VCC and GND) ...-3.3V to +3.3V, Differential
CML Output Loading (termination)............................0Ω to 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
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.
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 guaranteed by design and characterization.)
OPERATING CONDITIONS
PARAMETER
Supply Voltage
SYMBOL
CONDITIONS
VCC
Operating Ambient Temperature
Data Rate
MIN
TYP
MAX
3.0
3.3
3.6
V
0
25
70
°C
1.65
Gbps
0.25
Maximum Channel Loss
At 825MHz, FR-4 microstrip compensate
on curve
Source Output Rise/Fall Time
20% to 80%, measured at source
transmitter (input to channel)
Differential Input-Voltage Swing
Measured at source transmitter (input to
channel)
Maximum Supply Noise
Tolerance
DC-5000kHz, all specifications maintained
15
700
UNITS
dB
1050
240
ps
1400
mVP-P
50
mVP-P
POWER SUPPLY
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
110
140
mA
TYP
MAX
UNITS
0.2
UI P-P
DC PARAMETERS
Supply Current
TMDS EQUALIZER PERFORMANCE
PARAMETER
Residual Output Jitter (15 x
RJRMS + DJ) from 0.25Gbps to
1.65Gbps
2
CONDITIONS
MIN
Subtract source jitter for DJ, 0 to 15dB FR4 loss at
825MHz (Note 1)
_______________________________________________________________________________________
www.BDTIC.com/maxim
DVI/HDMI TMDS FR-4 and
Cable Equalizer/Driver
(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 guaranteed by design and characterization.)
CML INPUTS
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
VCC 400
VCC +
100
mV
VCC +
10
mV
55
Ω
DC PARAMETERS
Common-Mode Input Voltage
Input Termination Voltage
When disconnected from source
VCC 10
Single-Ended Input Termination
With 50Ω load, each side to VCC
45
50
AC PARAMETERS
Differential Input Return Loss
< 1.6GHz
14
dB
CML OUTPUTS
PARAMETER
CONDITIONS
MIN
TYP
MAX
With 50Ω load, each side to VCC;
LEVEL = low
900
1050
1200
With 50Ω load, each side to VCC;
LEVEL = high; 200Ω back termination
900
1050
1200
UNITS
DC PARAMETERS
Differential Output-Voltage Swing
mVP-P
Single-Ended High Output
Voltage
LEVEL = low
VCC 10
VCC +
10
mV
Single-Ended Low Output
Voltage
LEVEL = low
VCC 600
VCC 400
mV
Output Voltage When ENABLE
Disabled
LEVEL = low, ENABLE = high
VCC 10
VCC +
10
mV
230
ps
AC PARAMETERS
Output, Rise/Fall Time
20% to 80%; with 50Ω load,
each side to VCC
80
170
_______________________________________________________________________________________
www.BDTIC.com/maxim
3
MAX3814
SPECIFICATION TABLES (continued)
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 guaranteed by design and characterization.)
LVTTL/LVCMOS AND OPEN-COLLECTOR LVTTL
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
0.8
V
DC PARAMETERS
LVTTL Input High Voltage
2.0
V
LVTTL Input Low Voltage
LVTTL Input High Current
-100
+100
μA
LVTTL Input Low Current
-100
+100
μA
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.
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 INPUT: EYE DIAGRAM OF
1.65Gbps DATA AFTER 80in OF FR-4
POWER-SUPPLY CURRENT
vs. TEMPERATURE
MAX3814 OUTPUT: EYE DIAGRAM OF MAX3814
EQUALIZING 1.65Gbps DATA AFTER 80in OF FR-4
MAX3814 toc02
MAX3814 toc03
MAX3814 toc01
150
LEVEL = HIGH
100
LEVEL = LOW
140mVP-P/div
140mVP-P/div
POWER-SUPPLY CURRENT (mA)
MAX3814
DVI/HDMI TMDS FR-4 and
Cable Equalizer/Driver
50
0
0
10
20
30
40
50
60
70
100ps/div
100ps/div
TEMPERATURE (°C)
4
_______________________________________________________________________________________
www.BDTIC.com/maxim
DVI/HDMI TMDS FR-4 and
Cable Equalizer/Driver
MAX3814 OUTPUT: 250Mbps DATA AFTER
30ft OF TENSOLITE 28 AWG CABLE
MAX3814 toc04
125mV/div
140mVP-P/div
140mVP-P/div
(INPUT SIGNAL LEVEL = 0dBm)
(OUTPUT DISABLED)
DETERMINISTIC JITTER vs.
LENGTH OF FR-4 BOARD
DETERMINISTIC JITTER vs.
LENGTH OF 24 AWG CABLE
(SOURCE SIGNAL LEVEL = 700mVP-P/1200mVP-P,
DATA RATE = 0.825Gbps AND 1.65Gbps,
LOSS = 0.209dB/in AT 820MHz)
200
SDD11
50
2.25Gbps
40
700mVP-P
-15
150
1.65Gbps
100
20
1200mVP-P
-20
700mVP-P
S11
825Mbps
50
-25
-30
3000
2000
DETERMINISTIC JITTER
FOR 28 AWG TWIN AX CABLE
RESIDUAL JITTER DUE TO POWER-SUPPLY
SINUSOIDAL NOISE
50
VIN = 700mVP-P
60
NO NOISE
40
20
VIN = 1200mVP-P
0
0
10
20
30
40
LENGTH OF TWIN AX CABLE (ft)
50
50mV NOISE
RESIDUAL JITTER (ps)
RESIDUAL JITTER (ps)
100
0
0.001
(SOURCE SIGNAL LEVEL = 700mVP-P,
NOISE SIGNAL LEVEL = 50mVP-P,
DATA RATE = 1.65Gbps, 60in FR-4)
0.01
0.1
1
NOISE FREQUENCY (MHz)
15
20
25
30
35
40
RESIDUAL JITTER
150
MAX3814 toc11
100
80
10
LENGTH OF 24 AWG CABLE (ft)
LENGTH OF FR-4 (in)
150
5
0
10 20 30 40 50 60 70 80 90 100
FREQUENCY (MHz)
(SOURCE SIGNAL LEVEL = 700mVP-P/1200mVP-P,
DATA RATE = 1.65Gbps,
LOSS = 0.358dB/ft AT 820MHz)
(SOURCE SIGNAL LEVEL = 700mVP-P,
DATA RATE = 1.65Gbps AND 2.25Gbps,
CABLE LOSS = 0.261dB/ft AT 1.12GHz)
0
0
MAX3814 toc10
200
1000
1.65Gbps
10
0
0
30
10
100
(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 toc12
DJ (ps)
-10
DJ (ps)
-5
74ps/div
250
MAX3814 toc07
0
100ps/div
MAX3814 toc08
SINGLE-ENDED/DIFFERENTIAL INPUT
RETURN LOSS (S11/SDD11)
GAIN (dB)
MAX3814 toc06
MAX3814 toc05
100ps/div
DJ (ps)
MAX3814 OUTPUT: 2.25Gbps DATA AFTER
33ft OF 24 AWG SPECTRA STRIP CABLE
MAX3814 toc09
MAX3814 OUTPUT: 1.65Gbps DATA AFTER
30ft OF TENSOLITE 28 AWG CABLE
100
50
0
300
700
1100
1500
INPUT SIGNAL LEVEL (mVP-P)
_______________________________________________________________________________________
www.BDTIC.com/maxim
5
MAX3814
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.)
DVI/HDMI TMDS FR-4 and
Cable Equalizer/Driver
MAX3814
Pin Description
6
PIN
NAME
1, 8, 17, 24
N.C.
No Connection. Not internally connected.
FUNCTION
2
INB+
Positive TMDS Input, CML
3
INB-
Negative TMDS Input, CML
4, 5, 9, 32
VCC
Power Supply. All pins must be connected to VCC.
6
INC+
Positive TMDS Input, CML
7
INC-
Negative TMDS Input, CML
10
IND+
Positive TMDS Input, CML
11
IND-
Negative TMDS Input, CML
12
ENABLE
13, 16, 20, 21,
25, 28
VEE
Active-Low Enable Input, LVTTL. High to disable, outputs off. Low to enable, outputs on.
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
_______________________________________________________________________________________
www.BDTIC.com/maxim
DVI/HDMI TMDS FR-4 and
Cable Equalizer/Driver
The MAX3814 TMDS equalizer/driver accepts differential
CML input data rates from 250Mbps to 1.65Gbps. It consists of four differential CML input buffers, four independent 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.
INA+/-
INB+/-
INC+/-
IND+/-
TERMINATED
TO VCC
TERMINATED
TO VCC
TERMINATED
TO VCC
TERMINATED
TO VCC
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 200Ω back
termination resistor while maintaining the differential
swing of 1000mVP-P. This 200Ω back 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 Outputs section for more information.
EQUALIZER
LIMITING
AMPLIFIER
DRIVER
OUTA+/-
EQUALIZER
LIMITING
AMPLIFIER
DRIVER
OUTB+/-
EQUALIZER
LIMITING
AMPLIFIER
DRIVER
OUTC+/-
EQUALIZER
LIMITING
AMPLIFIER
DRIVER
OUTD+/ENABLE
MAX3814
LEVEL
OUTPUT LEVEL CONTROL
Figure 1. Functional Diagram
_______________________________________________________________________________________
www.BDTIC.com/maxim
7
MAX3814
Detailed Description
MAX3814
DVI/HDMI TMDS FR-4 and
Cable Equalizer/Driver
CML Inputs and Outputs
The input buffers and the output drivers are currentmode logic (CML). See Figures 2, 3, and 4.
The input buffers consist of a 50Ω load resistor connected
to VCC and the input connected to a differential equalizer.
The output drivers are open-collector. The current in
these outputs can be adjusted to 10mA or 15mA with
the control pin LEVEL. For 10mA operation, each opencollector output drives through a transmission line to a
50Ω pullup of the next stage, as shown in Figure 3. For
recommended 15mA operation, the two outputs are
bridged by an external 200Ω back termination resistor
that is subsequently pulled up by a 50Ω resistor of the
next stage, as shown in Figure 4. The ESD structure permits signals to achieve 5.5V absolute maximum ratings,
high common-mode range, and compatibility to HDMI
testing. The back termination resistor should be placed
as close as possible to the MAX3814 in the layout.
The ESD protection for both the input and output circuitry consists of diodes connected to a transient voltage suppressor clamp shown as a Schottky diode in
Figures 2, 3, and 4. For more information about the
function of the suppressor clamp, refer to the Detailed
Description section of the MAX3208E data sheet
(www.maxim-ic.com/MAX3208E).
VT
VCC
TRANSIENT
SUPRESSOR
CLAMP
50Ω
50Ω
TRANSIENT
SUPRESSOR
CLAMP
IN_+
50Ω
OUT_+
OUT_-
+
VCC
TRANSIENT
SUPRESSOR
CLAMP
50Ω
EQUALIZER
LEVEL = LOW
ENABLE = HIGH
IN_10mA
Figure 2. Simplified Input Circuit
8
5mA
Figure 3. Simplified Output Circuit Without Back Termination
Resistor
_______________________________________________________________________________________
www.BDTIC.com/maxim
DVI/HDMI TMDS FR-4 and
Cable Equalizer/Driver
MAX3814
VT
VCC
50Ω
TRANSIENT
SUPRESSOR
CLAMP
50Ω
OUT_+
44kΩ
200Ω
OUT_BACK TERMINATION
LEVEL,
ENABLE
INPUTS
44kΩ
88kΩ
LEVEL = LOW
ENABLE = HIGH
10mA
50kΩ
TRANSIENT
SUPRESSOR
CLAMP
5mA
Figure 4. Simplified Output Circuit with Back Termination
Resistor
Output Enable Control
The ENABLE pin is an LVTTL input that allows the user
to shut off the output-collector currents, thereby reducing power consumption of the device. Forcing this pin
high turns the output currents off; forcing this pin low
(normal operation) turns the currents on.
Figure 5 shows a simplified circuit for both the output
and enable controls.
Figure 5. Simplified Input Circuitry for Output Level (LEVEL)
and Enable (ENABLE) Control
Applications Information
Figure 6a shows a typical TMDS channel from a graphics board of a laptop computer to a remote display.
Maintaining a 100Ω differential impedance for this
channel has its challenges. Besides proper board layout of traces, there are multiple reflection points (A to
H). For example, at interface F in Figure 6a, a circular
arrow shows a reflection at the connector of a remote
display. When these reflections hit another interface,
they reflect again and thus become echoes corrupting
the incident signal. In Figure 6b, the MAX3814 is used
to equalize losses, isolate reflections, and redrive the
transmission line with high fidelity.
_______________________________________________________________________________________
www.BDTIC.com/maxim
9
MAX3814
DVI/HDMI TMDS FR-4 and
Cable Equalizer/Driver
Laptop PC TMDS Equalizer and Driver
As shown at location XX in Figure 6b, the MAX3814
equalizes trace losses and redrives the TMDS outputs
at the docking connector. The 200Ω resistor at the output of the MAX3814 absorbs reflections from the docking connector.
Dock or Port Expander
The MAX3814 can also be used on the dock or port
expander as it equalizes loss, isolates the connector,
and redrives TMDS output signals at location YY as
shown in Figure 6b. Similarly, with the previous applica-
LAPTOP
tion, the 200Ω resistor at the output of the MAX3814
absorbs reflections in this case from the DVI or the
HDMI connector.
An optional 2dB to 6dB attenuator pad can be used to
absorb reflections between internal interface connections. If used, the attenuator pad must be a matched Pi
or T attenuator network. The resulting flat through loss
can be made by the excellent input sensitivity of the
MAX3814 as shown in the Typical Application Circuits.
The MAX3814’s excellent input sensitivity allows the
attenuated signal to be restored.
DOCK
REMOTE DISPLAY
EXTERNAL DVI/HDMI
CABLE
GRAPHICS
BOARD
50Ω
3.3V
ASIC
ASIC
50Ω
3.3V
MXM
CONNECTOR
A
B
C
DVI/HDMI
CONNECTOR
INTERNAL
CONNECTOR
OR FLEX
DOCKING
CONNECTOR
D
E
F
DVI/HDMI
CONNECTOR
G
H
REFLECTION
INTERFACES
LAPTOP
GRAPHICS
BOARD
ASIC
DOCK
REMOTE DISPLAY
XX
YY
MAX3814
MAX3814
50Ω
3.3V
200Ω
PAD
50Ω
3.3V
MXM
CONNECTOR
50Ω
3.3V
EXTERNAL DVI/HDMI
CABLE
INTERNAL
CONNECTOR
OR FLEX
MAX3814
50Ω
3.3V
200Ω
50Ω
3.3V
DOCKING
CONNECTOR
ZZ
200Ω
50Ω
3.3V
50Ω
3.3V
ASIC
50Ω
3.3V
DVI/HDMI
DVI/HDMI
CONNECTOR CONNECTOR
Figure 6a (top). Schematic Showing the TMDS Signal Channel from the Laptop Graphics Boards to the Remote Display. Possible
Reflection Interfaces are Labeled A to H.
Figure 6b (bottom). Schematic Showing the Same Channel, with possible location of the MAX3814 to Equalize Losses, to Absorb
Reflections, and to Redrive the Transmission Line.
10
______________________________________________________________________________________
www.BDTIC.com/maxim
DVI/HDMI TMDS FR-4 and
Cable Equalizer/Driver
• The 4-channel implementation treats all channels
identically. Input and output data channel designations are only a guide. Polarity assignments can be
swapped and channel paths can be interchanged.
• An uninterrupted ground plane should be positioned beneath the high-speed I/Os.
• Ground-path vias should be placed close to the
IC and the input/output interfaces to allow a return
current path to the IC and the DVI and HDMI
inputs.
• Maintain a 100Ω differential transmission line
impedance into and out of the MAX3814.
Layout Considerations
The TMDS CML inputs are the most critical paths for
the MAX3814 and great care should be taken to minimize discontinuities on these transmission lines
between the connector and the IC. Here are some suggestions for maximizing the performance of the
MAX3814.
• The data and clock inputs should be wired directly between the cable connector and IC without
stubs.
• To minimize possible reflections, choose the
200Ω back termination option. Place this resistor
as close to the MAX3814 as possible.
• Use good high-frequency layout techniques and
multilayer boards with an uninterrupted ground
plane to minimize EMI and crosstalk. Refer to the
schematic and board layers of the MAX3814EVKIT.
Typical Application Circuits
LAPTOP
GRAPHICS
BOARD
DOCK
MAX3814
CMOS
ROUTING
SWITCH
ASIC
50Ω
3.3V
MAX3814
200Ω
50Ω
3.3V
MXM
CONNECTOR
REMOTE DISPLAY
EXTERNAL DVI/HDMI
CABLE
50Ω
3.3V
50Ω
3.3V
200Ω
50Ω
3.3V
DOCKING
CONNECTOR
MAX3814
200Ω
50Ω
3.3V
50Ω
3.3V
ASIC
50Ω
3.3V
DVI/HDMI
DVI/HDMI
CONNECTOR CONNECTOR
______________________________________________________________________________________
www.BDTIC.com/maxim
11
MAX3814
Cable TMDS Equalizer
The MAX3814 is useful in providing equalization for
cables losses at location ZZ, at the input DVI/HDMI
connector of the remote display. It can equalize cable
lengths of 15 meters of 26 AWG wire and 12 meters of
28 AWG wire. Again, the 200Ω resistor placed at the
output of the MAX3814 absorbs reflections from the
imperfect termination of the ASIC or imperfect transmission-line interconnect.
DVI/HDMI TMDS FR-4 and
Cable Equalizer/Driver
MAX3814
Typical Application Circuits (continued)
DVI-D OR HDMI
EXTENDER BOX
UP TO 60m
DVI-D OR
HDMI CABLE
STANDARD
LENGTH DVI-D
OR HDMI CABLE
MAX3816
DDC EXTENDER
HDTV
MAX3815
MAX3814
EQUALIZER
DRIVER/EQUALIZER
VIDEO SOURCE
DIGITAL BROADCAST
DIGITAL CABLE
DIGITAL SATELLITE
DVD
Blu-ray™ DISC
HD-DVD
Blu-ray is a trademark of Blu-ray Disc Association.
3.3V ±10%
VCC
VCC
VCC
LEVEL
3.3V ±10%
MAX3814
50Ω
100Ω
0.1μF
0.1μF
Z (DIFFERENTIAL) = 100Ω
EQ/DRIVER
(1 OF 4)
0.1μF
CONTROLLED IMPEDANCE
TRANSMISSION LINE OR CABLE
0.1μF
100Ω
50Ω
3.3V ±10%
VCC
GND
12
3.3V
CONTROLLED IMPEDANCE
TRANSMISSION LINE OR CABLE
50Ω
Rx
Z (DIFFERENTIAL) = 100Ω
AC-COUPLING APPLICATION:
(NOT FOR A DC-COUPLED
50Ω
DVI/HDMI TMDS LINK)
3.3V
ENABLE
______________________________________________________________________________________
www.BDTIC.com/maxim
DVI/HDMI TMDS FR-4 and
Cable Equalizer/Driver
Chip Information
OUTC+
OUTC-
N.C.
22
VEE
23
VEE
OUTB+
24
OUTB-
TOP VIEW
N.C.
PROCESS: SiGe BiPOLAR
21
20
19
18
17
Package Information
VEE 25
16
OUTA- 26
15
OUTD+
OUTA+ 27
14
OUTD-
13
VEE
VEE 28
MAX3814
VEE
12
ENABLE
INA+ 30
11
IND-
INA- 31
10
IND+
VCC 32
9
VCC
LEVEL 29
For the latest package outline information and land patterns,
go to www.maxim-ic.com/packages. Note that a “+”, “#”, or
“-” in the package code indicates RoHS status only. Package
drawings may show a different suffix character, but the drawing
pertains to the package regardless of RoHS status.
PACKAGE
TYPE
PACKAGE
CODE
OUTLINE
NO.
LAND
PATTERN NO.
32 TQFP
H32+1
21-0110
90-0149
2
3
4
5
6
7
8
INB-
VCC
VCC
INC+
INC-
N.C.
N.C.
1
INB+
+
TQFP
(5mm × 5mm × 1.0mm)
______________________________________________________________________________________
www.BDTIC.com/maxim
13
MAX3814
Pin Configuration
MAX3814
DVI/HDMI TMDS FR-4 and
Cable Equalizer/Driver
Revision History
REVISION
NUMBER
REVISION
DATE
0
5/07
Initial release
1
9/07
Corrected TA = 0°C to +85°C to TA = 0°C to +70°C in the Specification Tables
globals; replaced the package outline drawing with the Package Information table
2
12/10
DESCRIPTION
PAGES
CHANGED
—
Changed the operating ambient temperature max from 85°C (max) to 70°C (max) in
the Operating Conditions table; added the package code and land pattern no. to the
Package Information table
2, 3, 4, 13
2, 13
Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are
implied. Maxim reserves the right to change the circuitry and specifications without notice at any time.
14 ____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600
© 2010 Maxim Integrated Products
Maxim is a registered trademark of Maxim Integrated Products, Inc.
www.BDTIC.com/maxim