General Description
The MAX4886 evaluation kit (EV kit) is a fully assembled
and tested surface-mount printed-circuit board (PCB)
that contains two sub circuits, a typical 2:1 HDMI™
switch application (top half), and an eye diagram test
circuit (bottom half).
The MAX4886 HDMI application circuit evaluates the
MAX4886 high-speed HDMI/DVI™ 2:1 digital video
switch, combined with the MAX4929E for lower fre-
quency signals, to provide a full 2:1 HDMI application
circuit. The EV kit operates from a 5V DC power supply
and provides on-board 3.3V regulation. HDMI input/out-
put connections are also provided to easily interface
with HDMI-compatible devices. All signal traces in the
HDMI application circuit are 100Ωdifferential con-
trolled-impedance traces.
A separate test circuit is also provided at the bottom of
the MAX4886 EV kit for eye diagram evaluation using
SMA connections and 50Ωcontrolled-impedance traces.
Features
♦Self-Powered from HDMI Source
♦Optional 5V Power Supply
♦Complete 2:1 HDMI Switching Circuit
♦Eye Diagram Test Circuit with SMA Input/Output
♦HDMI Inputs/Outputs
♦Surface-Mount Construction
♦Fully Assembled and Tested
Evaluates: MAX4886
MAX4886 Evaluation Kit
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Maxim Integrated Products
1
19-4082; Rev 0; 3/08
Component List
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.
Ordering Information
DESIGNATION QTY DESCRIPTION
3.3V, HPIR_OUT 0 Not installed, test points
C1–C13,
C15–C20, C23 20
0.1µF ±10%, 10V X5R ceramic
capacitors (0402)
Murata GRM155R61A104K
TDK C1005X5R1A104KT
C14 1
10µF ±10%, 10V X5R ceramic
capacitor (0805)
Murata GRM21BR61A106K
TDK C2010X5R1A106K
C21, C22 2
1µF ±10%, 10V X5R ceramic
capacitors (0402)
Murata GRM155R61A105K
Taiyo Yuden LMK105BJ105KV
D1, D5 2
Dual 40V/20mA Schottky diodes
(SOT23)
Central CMPSH-3CELLEADFREE
(DB2E)
D2 1 Red SMT LED (0603)
D3 1 Orange SMT LED (0603)
D4 1 Green SMT LED (0603)
IN+, IN-,
OUT+, OUT- 4Edge-mount receptacle SMA
connectors
PART TYPE
MAX4886EVKIT+ EV Kit
+
Denotes lead-free and RoHS-compliant.
DESIGNATION QTY DESCRIPTION
J1, J2, J3 3 HDMI type-A receptacle connectors
JU1, JU2, JU3 3 3-pin headers
R1, R2, R3 3 680Ω ±5% resistors (0603)
R4 1 1kΩ ±5% resistor (0603)
R5, R6, R7 3 2.2kΩ ±5% resistors (0603)
R8–R11,
R13, R14 0 Not installed, resistors (0603)
R12 1 10kΩ ±5% resistor (0603)
U1, U4 2
2:1 HDMI high-speed switches
(42 TQFN-EP*)
Maxim MAX4886ETO+
U2 1 Low-speed switch (20 TQFN-EP*)
Maxim MAX4929EETP+
U3 1 3.3V LDO (6 SOT23)
Maxim MAX6329TPUT-T+
— 3 Shunts
— 1 PCB: MAX4886 Evaluation Kit+
*
EP = Exposed pad.
HDMI is a trademark of HDMI Licensing, LLC.
DVI is a trademark of Digital Display Working Group (DDWG).
Evaluates: MAX4886
MAX4886 Evaluation Kit
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Quick Start
Recommended Equipment
Before beginning, the following equipment is needed:
• One or two HDMI sources
• HDMI-compatible sink (e.g., monitor)
Procedure
The MAX4886 EV kit is a fully assembled and tested
surface-mount PCB. Follow the steps below to verify the
board operation:
1) Verify that a shunt is installed across pins 1-2 on
jumpers JU1, JU2, and JU3.
2) Connect one or two HDMI sources to J2 and/or J3.
3) Connect an HDMI-compatible sink to J1.
4) Enable the HDMI source(s).
Detailed Description
The MAX4886 EV kit is a fully assembled and tested
surface-mount PCB. The MAX4886 EV kit comprises
two circuits, a typical HDMI 2:1 switch, and an eye dia-
gram test circuit.
The HDMI application circuit evaluates the MAX4886
high-speed HDMI/DVI 2:1 digital video switch, combined
with the MAX4929E, to perform a full 2:1 HDMI switching
function. On the EV kit, the typical 2:1 HDMI switching
circuit (top half) can be self-powered from the HDMI
source or from an external regulated 5V source and pro-
vides on-board 3.3V regulation to power the switching
circuit. All signal traces in the HDMI application circuit
are 100Ωdifferential controlled-impedance traces.
A separate test circuit is also provided at the bottom of
the MAX4886 EV kit for eye diagram evaluation using
SMA connections and 50Ωcontrolled-impedance traces.
Logic Inputs (SEL)
The MAX4886 SEL pin controls the signal paths
between source 1 and source 2. By setting jumper JU1
(see Table 1), SEL can be configured to set the signal
path either from J3 to J1 or from J2 to J1.
Input Supply and On-Board Regulation
Jumper JU2 selects between the MAX4886 EV kit’s
power-up options, either through the HDMI source
applied at J2/J3 or an external 5V DC power supply. To
configure these options, set JU2 as desired (see Table 2).
The MAX6329 then converts the voltage from 5V (V+) to
3.3V (VDD) to power the MAX4886 and MAX4929E (top
half). Note that when powering from a regulated exter-
nal 5V supply, make sure to apply power before the
HDMI signal is applied.
MAX4929E Enable Input (HIZ2)
The MAX4929E is enabled through configuration of the
HIZ1 and HIZ2 pins. Jumper JU3 controls the
MAX4929E’s enable input on the EV kit by controlling
the HIZ2 pin. By configuring JU3 to the desired setting
(see Table 3), the MAX4929E can be set for normal
operation or placed in a high-impedance state. Note
that the MAX4929E’s HIZ1 pin is set to GND by default.
Table 1. Jumper JU1 Functions
SHUNT POSITION MAX4886 SEL PIN SIGNAL PATH
1-2* Connected to VDD J3 to J1
2-3 Connected to GND J2 to J1
*
Default position.
Table 2. Jumper JU2 Functions
SHUNT POSITION EV KIT INPUT SUPPLY
1-2* Supplied from HDMI source
2-3 Externally supplied to +5V pad
*
Default position.
Table 3. Jumper JU3 Functions
SHUNT
POSITION MAX4929E HIZ2 PIN FUNCTION
1-2* Connected to VDD Normal operation
(enabled)
2-3 Connected to GND High-impedance
mode (disabled)
*
Default position.
Component Suppliers
SUPPLER PHONE WEBSITE
Central Semiconductor 516-435-1110 www.centralsemi.com
Murata Electronics North America, Inc. 770-436-1300 www.murata-northamerica.com
Taiyo Yuden 800-348-2496 www.t-yuden.com
TDK Corp. 847-803-6100 www.component.tdk.com
Note: Indicate that you are using the MAX4886 when contacting these component suppliers.
CEC Channel
The consumer electronics control (CEC) channel is
optional for implementation on the MAX4886 EV kit. In
order to use this channel, populate R13 and R14 as
necessary with a 0Ωresistor.
Eye Diagram Test Circuit
A separate test circuit is provided in the bottom section
of the MAX4886 EV kit for eye diagram evaluation of the
MAX4886 IC. This circuit provides differential SMA
inputs and outputs with 50Ωcontrolled-impedance
traces. R8–R11 can be populated to terminate as nec-
essary. A regulated 3.3V power supply is required
between VIN and GND2.
Evaluates: MAX4886
MAX4886 Evaluation Kit
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Evaluates: MAX4886
MAX4886 Evaluation Kit
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Figure 1a. MAX4886 EV Kit Schematic (Sheet 1 of 2)
Evaluates: MAX4886
MAX4886 Evaluation Kit
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Figure 1b. MAX4886 EV Kit Schematic (Sheet 2 of 2)
Evaluates: MAX4886
MAX4886 Evaluation Kit
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Figure 2. MAX4886 EV Kit Component Placement Guide—Top
Silkscreen
Figure 3. MAX4886 EV Kit PCB Layout—Component Side
Evaluates: MAX4886
MAX4886 Evaluation Kit
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Figure 4. MAX4886 EV Kit PCB Layout—GND Layer 2 Figure 5. MAX4886 EV Kit PCB Layout—GND Layer 3
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.
8
___________________
Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600
© 2008 Maxim Integrated Products is a registered trademark of Maxim Integrated Products, Inc.
Evaluates: MAX4886
MAX4886 Evaluation Kit
Figure 6. MAX4886 EV Kit PCB Layout—Solder Side Figure 7. MAX4886 EV Kit Component Placement Guide—
Bottom Silkscreen
