19-4048; Rev 0; 2/08
MAX3845/MAX4814E Evaluation Kit
General Description
The MAX3845/MAX4814E evaluation kit (EV kit) is an
assembled demonstration board that provides in-sys-
tem evaluation of the MAX3845 DVI™/HDMI™ 2:4
TMDS
®
fanout/buffer and the MAX4814E 2:4 low-fre-
quency switch. The input and output connections are
made through Molex DVI and HDMI connectors for
direct connection to DVI and HDMI cables.
An AC-to-DC wall-plug power adapter is included to pro-
vide power for the board. The board contains DC-DC con-
version circuitry to allow operation of the +3.3V-supplied
MAX3845 from the +5V DC wall-plug source.
o
Full 4-Output Fanout
o
Independent DDC Routing to Any Output from
Each Input with Priority to Input 1
o
DVI-I and HDMI Connectors
o
Supports Full 1080p and 1920 x 1200 Resolutions
o
Input 2 Includes MAX3815 for Extended Cable
Usage Up to 60 Meters
o
Independent Selection of Preemphasis Level on
Each Output
o
All TMDS I/Os Feature 15kV HBM ESD Protection
o
Wall-Plug Power-Supply Operation
o
Fully Assembled and Tested
Features
Evaluates: MAX3845/MAX4814E
Ordering Information
PART
MAX3845/4814EEVKIT
TYPE
EV Kit
Block Diagram
HDMI
TMDS DIFFERENTIAL
SIGNALS: D0, D1, D2, CLK
HDMI
8
DVI
INPUT 1
8
HIGH-SPEED
TMDS SWITCH
8
OUTPUT 1
5
MAX3815
EQUALIZER
MAX3845
2:4 SWITCH
8
OUTPUT 2
5
DVI
LOW-SPEED
DDC/HPD SWITCH
8
5
DVI
INPUT 2
5
DDC SIGNALS:
DATA, CLK, +5V,
GND, HPD
MAX4814E
2:4 SWITCH
OUTPUT 3
5
DVI
8
OUTPUT 4
5
DVI is a trademark of Digital Display Working Group.
HDMI is a trademark of HDMI Licensing, LLC.
TMDS is a registered trademark of Silicon Image, Inc.
________________________________________________________________
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.
MAX3845/MAX4814E Evaluation Kit
Evaluates: MAX3845/MAX4814E
Component List
DESIGNATION
C1–C8, C13
C9
C10
C11, C24
C12
C14–C23,
C25–C35
D3–D6
D7–D10
D11
J1, J3
J2, J4, J5, J6
J9
JU1, JU2
JU3
L1
L2
Q1
R1–R16, R34
R17–R20
R21–R24, R47
R29, R30, R32,
R33, R35, R36,
R44, R45
QTY
9
1
1
2
1
21
4
4
1
2
4
1
2
1
1
1
1
17
4
5
8
DESCRIPTION
0.01μF ±10% ceramic capacitors
(0402)
0.47μF ±10% ceramic capacitor
(0402)
1000pF ±10% ceramic capacitor
(0402)
22μF ±10% ceramic capacitors
(1206)
10μF ±10% ceramic capacitor
(1206)
0.1μF ±10% ceramic capacitors
(0402)
LEDs, dual color
Switching diodes
LED red
HDMI connectors
DVI connectors
Power jack, 2.1mm
1 x 2 pin headers (0.1in centers)
1 x 3 pin header (0.1in center)
3.3μH inductor
Coilcraft MSS5131-332MX
Ferrite bead
Murata BLM18EG601
PNP transistor
Zetex FMMT591A
200
47.5k
100
121
±5% resistors (0402)
±1% resistors (0402)
±5% resistors (0402)
±1% resistors (0402)
DESIGNATION
R31, R37, R38,
R46, R51,
R54–R59, R62
R39, R40, R43,
R48, R63, R64
R49
R50
R60
R61
S1–S8
S9, S10
SW1–SW4,
SW13, SW14,
SW19, SW20
TP1–TP10
U1
U2, U3, U5–U9,
U11, U19, U22,
U28, U29
U4
U10
U12
U15–U18
U20
U24
None
None
None
None
QTY
12
4.7k
DESCRIPTION
±5% resistors (0402)
6
1
1
1
1
8
2
8
10
1
12
1
1
1
4
1
1
4
3
1
1
10k
2.21k
1k
0
±5% resistors (0402)
±1% resistor (0402)
potentiometer
resistor (0402)
OPEN
SP3T switches
BCD dial switches
SPDT switches
Test points
MAX3845UCQ+
MAX3208EAUB+
74ACT32P
MAX1556ETB+
MAX3815CCM+
Dual BJT transistors
Zetex ZXTD6717E6
MAX4814EECB+
MAX6346XR46+T
Bumpers
Shunts
Wall-plug transformer, 120V AC to
5V DC
PCB: MAX3845 Board, Rev D
2
_______________________________________________________________________________________
MAX3845/MAX4814E Evaluation Kit
Quick Start
For evaluation of the MAX3845 and MAX4814E, config-
ure the board as follows:
1) Ensure that jumpers are placed on JU1 and JU2 to
allow use of the wall-plug power supply. Shunt the
bottom two pins of JU3 to allow direct control of the
MAX4814E using BCD switches S9 and S10.
2) Plug the power supply into the 120V AC socket and
plug the other end into J9. The output LEDs should
light up. The Clock Loss LED (D11) should light up
red if the MAX3815 is powered (SW20 switch set to
the ON position).
3) Since the board has back termination resistors
installed on the board by default, set the OUTPUT
LEVEL switch (SW13) to HIGH. This sets the output
swing to the normal HDMI/DVI range even with the
back termination resistors in place.
4) Connect DVI/HDMI sources and sinks to the inputs
and outputs on the EV kit. The LEDs turn green when
a powered device is connected to the outputs. This
is done by detecting the +5V signal at HOTPLUG.
Note:
The DVI connectors on the board allow single-
link and dual-link DVI cables with DVI-D (digital only)
and DVI-I (digital and analog) connectors, but only
digital single-link video passes through the board.
5) If a long DVI cable is used to connect to a source,
connect it to INPUT 2. This input has the MAX3815
equalizer on it to compensate for high-frequency
losses on long cables.
6) If a source is connected to INPUT 2, be sure to
power up the MAX3815 by switching SW20 to ON
and SW19 to AUTO.
7) Route the DDC signals through the board using the
S9 and S10 rotary switches. Switch S9 routes the
DDC signals from input 1, and switch S10 routes
the DDC signals from input 2.
Note:
INPUT 1 DDC has priority, so if INPUT 1 and
INPUT 2 are connected to the same output, the
DDC connections from INPUT 2 are opened.
8) Select the input that you want to appear at outputs
1 to 4 by using the input select switches (S2, S4,
S5, S7).
9) Select the amount of preemphasis (0dB, 3dB, 6dB)
you want to appear at each output using the preem-
phasis switches (S1, S3, S6, S8).
If manual control of the MAX3815 equalizer is desired,
switch SW19 to MANUAL. To increase the amount of
equalization (long cables), turn R50 clockwise. To
decrease the amount of equalization (short cables),
turn R50 counterclockwise. Note that during manual
equalization, all three TMDS data channels are set to
the same level of equalization.
Evaluates: MAX3845/MAX4814E
ESD Protection
The MAX3845 provides 2kV of ESD protection on all
pins. If a higher level of ESD protection is desired, the
MAX3208E provides 15kV of ESD protection for DVI
and HDMI interfaces. It is designed to provide protec-
tion for differential lines while maintaining a low capaci-
tance for minimal effects on signal transmission.
Twelve MAX3208E devices are included in this
EV kit to protect all TMDS I/O connections. For sam-
ples, contact the Maxim Samples Department at
www.maxim-ic.com/samples
or call (888) 629-4642.
_______________________________________________________________________________________
3
MAX3845/MAX4814E Evaluation Kit
Evaluates: MAX3845/MAX4814E
Table 1. Adjustment and Control Descriptions (see Quick Start first)
COMPONENT
JU3
NAME
MODE
FUNCTION
Short the bottom two pins of JU3 to control the MAX4814E using the rotary switches S9 and
S10. Short the top two pins to control the MAX4814E through I
2
C using TP8 (SDA) and TP9
(SCL).
When manual control of the equalizer has been selected using SW19, the level of
equalization on the MAX3815 is controlled by R50.
These switches are used to set the level of preemphasis on the MAX3845’s output drivers
(0dB, 3dB, or 6dB).
These switches are used to select which input signal appears for each output. The middle
position powers down the output.
These rotary switches are used to connect the DDC signals (SDA, SCL, HOTPLUG, and
+5V) from one input to one output.
These switches allow the HOTPLUG signals from the DVI sinks to power up and power
down the MAX3845 outputs. To force operation of an output regardless of the HOTPLUG
signal, slide the switch down.
This switch sets all the MAX3845’s outputs to increased current drive (HIGH) or normal
current drive (LOW). The increased current drive setting allows for 200 back termination
resistors to be used (installed as default on the board).
This switch powers down input 1 when slid down. Note that any output selected to that
input would be powered down as well. The PWRDWN_2 pin is controlled by the loss-of-
clock circuit on the MAX3815. If the MAX3815 detects a signal at its RXC_IN input, it
powers up input 2 of the MAX3845. If no clock signal is detected, it powers down input 2.
Slide the switch up to manually control the level of equalization of the MAX3815. Slide it
down to have the MAX3815 automatically control the level of equalization.
This switch powers down the MAX3815 when slid down.
When the MAX3845 is powered up, the die junction temperature can be estimated by
measuring the voltage on TP2 relative to GND. For more information, refer to the MAX3845
data sheet.
Connect an I
2
C source to TP8 (SDA) and TP9 (SCL) to control the MAX4814E.
R50
S1, S3, S6, S8
S2, S4, S5, S7
S9, S10
EQ ADJ
PREEMPHASIS
INPUT SELECT
DDC
SWITCHING
HOTPLUG
DETECTION
SW1–SW4
SW13
OUTPUT LEVEL
SW14
POWER DOWN
SW19
SW20
EQ MODE
MAX3815
POWER DOWN
TEMP SENSE
SDA
SCL
TP2
TP8
TP9
4
_______________________________________________________________________________________
J9
VCC1
VCC2
U15
1
C1
B1
D3
E2
CA2
2
CA1
R30
121Ω
OUTPUT 2 CONNECTION STATUS
VCC2
U16
1
VCC2
3
C2
CA2
AN2
1
CA1
AN1
U19
10
R33
121Ω
U5
1
10
U2
29
30
9
R54 VCC2
4.7kΩ
28
27
HOTPLUG2
4
7
GND_OUT2
6
SDA_OUT2
+5V_OUT2
SCL_OUT2
1
U3
J4
9
R55 VCC2
4.7kΩ
4
3
2
1
7
12
11
10
9
20
VCC1
19
18
17
R7
200Ω
2
10
6
5
14
13
22
21
7
15
23
U22
C6 VCC1
0.01μF
100 99 98 97 96 95 94 93
V
CC1
V
CC1
GND1
GND1
GND1
GND1
GND1
GND1
GND1
IN1_A-
IN1_A+
GND1
OUT2_B+
OUT2_B-
V
CC1
GND1
OUT2_C+
OUT2_C-
7
V
CC1
GND1
4
OUT2_D+
OUT2_D-
V
CC1
IN_SEL2
U1
PREEMPH2
OUT_LEVEL
PREEMPH3
IN_SEL3
GND2
OUT3_A+
OUT3_A-
GND2
OUT3_B+
OUT3_B-
GND2
OUT3_C+
OUT3_C-
OUT4_A+
GND2
GND2
OUT3_D-
OUT3_D+
GND2
GND2
43
44
45
46
47
48
49
50
59
58
57
56
55
54
53
52
51
HOTPLUG3
4
7
HOTPLUG_OUT3
8
GND_OUT3
6
SDA_OUT3
+5V_OUT3
SCL_OUT3
1
U7
HOTPLUG3
R11
200Ω
2
10
6
5
4
14
13
12
22
21
20
7
15
23
VCC1
16
24
60
61
1
U6
R9
200Ω
2
10
29
PREEMPHASIS
SELECT 3
62
3
63
64
2
65
SW13
GND1
66
67
R8
200Ω
5
68
69
1
SW14
2
VCC1
3
VCC1
TEMP SENSE
GND
TP3 TP2
R61
OPEN
11
PWRDWN_1
12
V
13
CC3
LOSMUTE_EN
VCC1 R60
0Ω
C4 VCC1
0.01μF
10
PWRDWN 1
POWER-DOWN
POWER-UP
8
IN1_D+
9
IN1_D-
70
3
8
71
C26
0.1μF
72
73
74
75
92 91 90
89 88 87
86 85 84
83
82 81
80 79
78 77 76
VCC1
HOTPLUG_OUT2
8
16
24
VCC1
26
25
R5
200Ω
2
9
8
7
6
10
9
8
7
6
2
E2
4
4
3
VCC2
HOTPLUG2
D4
C1
2 B1
6
E1
B2 5
VCC2 R32
121Ω
AN1
1
AN2
4
4
3
C2
2
3
6
E1
B2 5
VCC2 R29
121Ω
GND
CLK-
CEC
RESERVED
CLK-C
DATA-C
PGND
POS
+5V
D2+
GND
D2-
D1+
GND
D1-
D0+
GND
D0-
2
1
2
3
4
5
6
7
8
9
11
12
13
14
15
16
17
18
3
JU1
L2
BEAD0603
10
19
GND
GND
VCC2
+5V
TP4
GND
TP5
CLK+
HOTPLG
1
J3
HDMI
OUTPUT 1 CONNECTION STATUS
TO WALL WART
INPUT 1
OFF
INPUT 2
INPUT SELECT 1
S2
1
ONE
2
TWO
3
C
4
THREE
5V_POWER
HOTPLUG1
R21
100Ω
VCC1
C12
10μF
VCC1
D1
INP
JU2
LX
PGND
D2
R46
4.7kΩ
R51
4.7kΩ
6
7
C11
22μF
C24
22μF
8
9
L1
3.3μH
10
6dB
3dB
0dB
1
ONE
2
TWO
3
C
4
THREE
+3.3V GND
TP6 TP7
U10
MAX1556
PREEMPHASIS
SELECT 1
S1
U24
C9
0.47μF
1
HOTPLUG_OUT1
+5V_OUT1
GND_OUT1
SDA_OUT1
SCL_OUT1
CEC
IN
2
GND
MAX6346
3
SS
GND
1
C10
1000pF
4
OUT
RESET
2
5
SHDN
VCC
3
R43
10kΩ
5V DC TO 3.3V DC
J1
HDMI
INPUT1
MAX3208EAUB
U11
10
1
D2+
GND
D2-
3
9
1
3
4
1
3
4
2
2
1
MAX3208EAUB
MAX3208EAUB
C26
0.1μF
3
8
C20
0.1μF
C25
0.1μF
MAX3208EAUB
D1+
GND
D1-
D0+
GND
D0-
CONNECTOR MOUNTED ON BOTTOM OF BOARD
CLK+
GND
CLK-
CEC
14
RESERVED
2
9
C2 VCC1
0.01μF
4
8
VCC2
5
IN1_C+
6
IN1_C-
7
6
C3 VCC1
0.01μF
C33
0.1μF
3
4
5
CLK C
DATA C
PGND
15V
HOTPLG
SCL_IN1
SDA_IN1
GND_IN1
+5V_IN1
HOTPLUG_IN1
19
18
17
16
15
13
CEC
1
10
IN_SEL1
OUT1_A-
OUT1_B-
OUT1_C-
OUT1_A+
OUT1_B+
OUT1_D-
OUT1_C+
HOTPLUG1
OUT1_D+
1
V
2
CC1
IN1_B+
3
IN1_B-
PREEMPH1
HOTPLUG2
OUT2_A+
OUT2_A-
12
11
10
9
R6
200Ω
5
8
7
4
5
7
6
6
5
VCC2
3
8
HOTPLUG1
4
C32
0.1μF
R1 2
200Ω
R2 5
200Ω
R3 2
200Ω
R4 5
200Ω
MAX3208EAUB
INPUT 1
OFF
INPUT 2
INPUT SELECT 2
S4
1
ONE
2
TWO
3
C
4
THREE
MAX3208EAUB
6dB
3dB
0dB
PREEMPHASIS
SELECT 2
S3
1
ONE
2
TWO
3
C
4
THREE
6
VCC1
1
N.C.
N.C.
N.C.
N.C.
VCC
VCC
GND
VCC
OUTON
OUTLEVEL
VCC
GND
V
CC2
IN2_D+
IN2_D-
V
CC2
IN_SEL4
PREEMPH4
HOTPLUG4
GND2
OUT4_D-
OUT4_D+
GND2
OUT4_C-
OUT4_C+
GND2
OUT4_B-
OUT4_B+
GND2
4
VCC
5
VCC
6
RX1_IN-
7
RX1_IN+
18
C13
0.01μF
VCC1
10
2
2
9
C16 VCC1
0.1μF
MAX3815
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
19
VCC2
C17 VCC1
0.1μF
13 14 15 16 17 18 19 20 21 22 23
R16
200Ω
5
4
3
2
GND
HOTPLUG4
24
11
3
C35
0.1μF
27
RX2_OUT-
26
RX2_OUT+
25
GND
31
RX1_OUT-
30
RX1_OUT+
29
GND
28
GND
R23
100Ω
42
OUT4_A-
21
13
5
VCC
RXC_IN+
RXC_IN-
VCC
EQCONTROL
CLKLOS
PWRDWN
GND
RXC_OUT-
RXC_OUT+
GND
Figure 1. MAX3845/MAX4814E EV Kit Schematic (Sheet 1 of 2)
MAX3845
OUTPUT LEVEL
HIGH
NORMAL
R62
4.7kΩ
SQUELCH
VCC1
VCC1
VCC2
C14 VCC1
0.1μF
48 47 46 45 44 43 42 41 40 39 38 37
R24
100Ω
VCC1
R47
100Ω
14
TEMP
15
PWRDWN_2
C5 VCC1
0.01μF
16
V
CC2
U28
MAX3208EAUB
1
10
2
9
C34
0.1μF
MAX3208EAUB
C28
0.1μF
3
CONDVI
9
R56 VCC2
4.7kΩ
8
28
27
30
VCC1
25
26
6dB
3dB
0dB
3
8
17
IN2_A+
18
IN2_A-
C7 VCC1
0.01μF
19
V
CC2
4
5
7
6
S6
1
ONE
2
TWO
3
C
4
THREE
U29
C15 VCC1
0.1μF
U12
23
IN2_C+
24
IN2_C-
VCC1 25 V
CC2
1
VCC
2
RX0_IN-
3
RX0_IN+
GND
RX0_OUT-
RX0_OUT+
GND
GND
36
35
34
33
32
20
IN2_B+
21
IN2_B-
C8 VCC1
0.01μF
22
V
CC2
J2
INPUT2
MAX3208EAUB
R10
200Ω
5
17
9
1
1
10
INPUT 1
OFF
INPUT 2
INPUT SELECT 3
S5
1
ONE
2
TWO
3
C
4
THREE
3
8
MAX3208EAUB
C29
0.1μF
3
J5
9
R57 VCC2
4.7kΩ
8
3
2
1
4
7
R14
200Ω
R13
200Ω
11
10
9
19
18
17
20
12
4
4
5
7
6
8
VCC
9
VCC
10
RX2_IN-
11
RX2_IN+
12
VCC
22
VCC1
VCC1
EQ CONTROL
1
U8
VCC1
2
VCC1
1
6
SW20
VCC1
R31
4.7kΩ
2
1
Q1
3
SQUELCH
2
CLOCK LOSS
1
R34
200Ω
INPUT 1
OFF
INPUT 2
D11
LED
VCC1
INPUT SELECT 4
S7
3
6dB
3dB
0dB
1
ONE
2
TWO
3
C
4
THREE
2
VCC1
PWRDWN EQ
POWER-UP
POWER-DOWN
PREEMPHASIS
SELECT 4
S8
TP1
R48
10kΩ
7
VCC2
8
3
SW19
MANUAL
AUTO
R22
100Ω
14
6
R15
200Ω
1
5
SCL_IN2
4
3
2
1
23
15
7
SDA_IN2
R50
1kΩ
MANUAL
EQ SET
R49
2.21kΩ
R12
200Ω
5
U9
C31
0.1μF
C30
0.1μF
6
GND_IN2
24
16
8
25
27
HOTPLUG_IN2
+5V_IN2
MAX3208EAUB
MAX3208EAUB
9
R59
4.7kΩ
10
6
7
VCC2
8
9
R58
4.7kΩ
10
VCC2
1
HOTPLUG3
C1
2 B1
3
C2
OUTPUT 3 CONNECTION STATUS
U17
6
E1
B2 5
E2
4
4
CA2
2
CA1
R36
121Ω
AN1
AN2
1
VCC2 R35
121Ω
26
28
30
29
D5
3
1
ONE
2
TWO
3
C
4
THREE
1
2
3
4
5
6
7
8
27
10
J6
9
11
12
13
14
15
16
25
17
18
19
20
21
22
23
24
26
28
OUTPUT 4 CONNECTION STATUS
VCC2
1
HOTPLUG4
30 29
C1
2 B1
3
C2
U18
6
E1
B2 5
E2
4
4
CA2
2
CA1
R45
121Ω
AN1
AN2
1
VCC2 R44
121Ω
SCL_OUT4
+5V_OUT4
SDA_OUT4
GND_OUT4
HOTPLUG_OUT4
D6
3
Evaluates: MAX3845/MAX4814E
_______________________________________________________________________________________
MAX3845/MAX4814E Evaluation Kit
5
嵌入式系统
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