19-4135; Rev 0; 5/08
MAX9392 Evaluation Kit
General Description
The MAX9392 evaluation kit (EV kit) is a fully assembled
and tested PCB that simplifies the evaluation of the
MAX9392 1.5GHz, dual 2 x 2 crosspoint switch. The EV
kit accepts low-voltage differential signals (LVDS) or
high-speed transistor logic (HSTL) input signals and
converts the signals to LVDS outputs for each channel.
The MAX9392 EV kit is designed with 100Ω differential
controlled impedance in a four-layer PCB. The board is
designed for direct differential probing of the LVDS
inputs/outputs. The EV kit operates from a single 3.3V
supply. The MAX9392 EV kit can also be used to evalu-
ate the MAX9393, which accepts LVPECL and CML
input signals.
♦
Single 3V to 3.6V Supply Operation
♦
1.5GHz Operation
♦
100Ω Controlled-Differential Signal Traces
♦
Supports Testing with Various Mediums
Differential Probes
Twisted-Pair Wire
Coax Cables with SMA Connectors
♦
Fully Assembled and Tested
Features
Evaluates: MAX9392/MAX9393
Ordering Information
PART
MAX9392EVKIT+
TYPE
EV Kit
+Denotes
lead-free and RoHS-compliant.
Component List
DESIGNATION
C1
QTY
1
DESCRIPTION
10µF ±10%, 6.3V X5R ceramic
capacitor (0805)
Murata GRM21BR60J106K
1µF ±10%, 6.3V X5R ceramic
capacitor (0805)
Murata GRM21BR60J105K
0.1µF ±10%, 16V X5R ceramic
capacitors (0603)
Murata GRM188R61C104K
0.01µF ±10%, 50V X5R ceramic
capacitors (0603)
Murata GRM188R61H103K
Not installed, ceramic capacitor
(0805)
SUPPLIER
16
SMA connectors (edge mounted)
DESIGNATION
J1–J8, JU1–JU9
R1
R2
R3–R10
R11–R26
U1
—
—
QTY
17
0
0
8
0
1
9
1
DESCRIPTION
2-pin headers
Not installed, resistor (1206)
Not installed, potentiometer
Bourne 3361P-1-101GLF
49.9Ω ±1% resistors (0603)
Not installed, resistors (0603)
Dual 2 x 2 crosspoint switch
(32 TQFP)
Maxim MAX9392EHJ+
Shunts (JU1–JU9)
PCB: MAX9392 Evaluation Kit+
C2
C3, C5, C8,
C10–C18,
C20–C35
C4, C6, C7, C9
1
28
4
C19
INA0,
INA0,
INA1
INA1,
INB0,
INB0
INB1,
INB1,
OUTA0
OUTA0,
OUTA1
OUTA1,
OUTB0,
OUTB0,
OUTB1,
OUTB1
0
Component Supplier
PHONE
WEBSITE
Murata
Electronics
770-436-1300 www.murata-northamerica.com
North America,
Inc.
Note:
Indicate that you are using the MAX9392 or MAX9393
when contacting this component supplier.
________________________________________________________________
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.
MAX9392 Evaluation Kit
Evaluates: MAX9392/MAX9393
Quick Start
Required Equipment
Before beginning, the following equipment is needed:
• 3V to 3.6V, 500mA power supply (VCC)
• LVDS signal generator (e.g., HP 8133A)
•
Digital sampling oscilloscope or communication
analyzer (e.g., CSA8000)
designed for direct differential probing at the LVDS
inputs/outputs and single-ended probing at the outputs
using the respective 2-pin headers. The EV kit operates
from a single 3.3V supply that provides 150mA of
output current.
The MAX9392 EV kit consists of two independent LVDS
channels (A and B) that can be configured to operate
in one of three modes (crosspoint switch, 1:2 splitter, or
dual repeaters), using on-board jumpers. All differential
receiver inputs (IN_) are terminated with two series-
connected 49.9Ω resistors. Resistor PCB pads
R11–R18 are provided at the EV kit output channels for
application-dependent termination.
Procedure
The MAX9392 EV kit is fully assembled and tested.
Follow the steps below to verify board operation.
Caution: Do not turn on the power supply until all
connections are completed.
1) Connect the power supply to the VCC PCB pad.
Connect the ground terminal of the power supply to
GND PCB pad.
2) Set the signal generators to provide an LVDS signal
(this requires both a noninverting and inverting sig-
nal output from the signal generator).
3) Verify that a shunt is not installed at jumper JU1
(MAX9392 evaluation).
4) Verify that shunts are installed at jumpers JU2, JU3,
JU6, and JU7 (all outputs enabled).
5) Verify that a shunt is not installed across jumper
JU4 and a shunt is installed across jumper JU5
(channel A configured in dual repeater mode).
6) Verify that a shunt is not installed across jumper
JU8 and a shunt is installed across jumper JU9
(channel B configured in dual repeater mode).
7) Connect the signal generator’s noninverting signals
to the INA_ and INB_ SMA inputs.
8) Connect the signal generator’s inverting signals to
the
INA_
and
INB_
SMA inputs.
9) Connect all the OUT_ SMA output connectors to the
digital oscilloscope inputs using 50Ω impedance
cables.
10) Enable the signal generators’ outputs.
11) Verify the signals by observing oscilloscope channels.
Power Supply
The MAX9392 EV kit can utilize up to three power sup-
plies. VCC is used as the power source for the
MAX9392 and the logic inputs. VTERM_IN and
VTERM_OUT PCB pads are used for input- and output-
termination voltages when evaluating the MAX9393.
VTERM_IN has a 0 to VCC - 1.2V input supply voltage
range. VTERM_OUT should be set to the respective
LVDS common-mode or bias voltage.
Input Signals
The MAX9392 accepts LVDS or HSTL differential input
signals. The differential high threshold is +100mV and
the differential low threshold is -100mV. The SMA input
connectors for the circuit are labeled INA_, INB_ (non-
inverting) and
INA_, INB_
(inverting). All differential
inputs are terminated with two 49.9Ω resistors (R3–R10)
to create a 100Ω impedance termination. The input sig-
nals can be monitored with a differential signal probe
placed across header pins J1–J4 for the desired signal.
Output Signals
The four differential outputs can be accessed at header
pins J5–J8 with shielded twisted-pair cables or differ-
ential probes. Pin 1 is the inverting signal (OUT_) and
Pin 2 is the noninverting signal (OUT_). When testing
the EV kit using differential probes or twisted pairs,
populate resistor PCB pads R11–R18 with 49.9Ω
(0603) surface-mount resistors. In addition to populat-
ing resistors R11–R18, terminate the twisted-wire pair
with a 100Ω resistor at the far end of the wire. All differ-
ential output pairs are laid out with equal trace length
having a maximum length difference of 10 mils and
100Ω controlled differential-impedance traces.
Leave coupling capacitors C11–C18 in series with the
outputs (OUT_,
OUT_)
and resistor PCB pads R11–R18
unpopulated when interfacing the output SMA OUT_
connectors to 50Ω impedance oscilloscope inputs.
Detailed Description of Hardware
The MAX9392 EV kit is a fully assembled and tested
PCB that simplifies the evaluation of the MAX9392
1.5GHz, dual 2 x 2 crosspoint switch. The EV kit
accepts LVDS and HSTL signals at each input and
converts the signals to LVDS output for each channel.
The MAX9392 EV kit is designed with 100Ω differential
controlled impedance in a four-layer PCB. The board is
2
_______________________________________________________________________________________
MAX9392 Evaluation Kit
Output Enable/Disable
(JU2, JU3, JU6, JU7)
Jumpers JU2, JU3, JU6, and JU7 enable and disable
the EV kit’s corresponding outputs. Remove the shunts
from the jumpers to disable the output pairs. The differ-
ential output pairs assert to a differential low condition
when disabled. Install a shunt across the jumpers to
enable the outputs. The outputs can also be enabled or
disabled by applying a logic signal at pin 1 of jumpers
JU2, JU3, JU6, and JU7. See Table 1 for proper jumper
settings for enabling and disabling the corresponding
outputs. Refer to the MAX9392 IC data sheet for proper
high and low logic levels at the enable inputs.
Switch Configuration
(JU4, JU5, JU8, JU9)
Jumpers JU4 and JU5 control the signal routing for
channel A differential inputs (INA0/INA0 and
INA1/INA1). Jumpers JU8 and JU9 control the signal
routing for channel B inputs (INB0/INB0 and
INB1/INB1). Channels A and B can be configured as
a 2 x 2 crosspoint switch, 1:2 splitter, or as dual
repeaters by configuring these jumpers. See Tables 2
and 3 for proper jumper settings for the different
switch configuration.
Evaluates: MAX9392/MAX9393
Table 1. Enabled/Disable Control (JU2,
JU3, JU6, JU7)
JUMPER
JU2
JU3
JU6
JU7
SHUNT POSITION
Not installed
Installed
Not installed
Installed
Not installed
Installed
Not installed
Installed
OUTPUT STATUS
OUTA1,
OUTA1
disabled
OUTA1,
OUTA1
enabled
OUTA0,
OUTA0
disabled
OUTA0,
OUTA0
enabled
OUTB1,
OUTB1
disabled
OUTB1,
OUTB1
enabled
OUTB0,
OUTB0
disabled
OUTB0,
OUTB0
enabled
Table 2. Channel A Output Routing Configuration (JU4, JU5)
SHUNT POSITION
JU4
Not installed
Not installed
Installed
Installed
JU5
Not installed
Installed
Not installed
Installed
SWITCH CONFIGURATION
1:2 splitter
Dual repeaters
2 x 2 switch
1:2 splitter
INPUT SIGNALS
INA0/INA0
INA0/INA0
INA1/INA1
INA0/INA0
INA1/INA1
INA1/INA1
OUTPUT SIGNALS
OUTA0/OUTA0, OUTA1/OUTA1
OUTA0/OUTA0
OUTA1/OUTA1
OUTA1/OUTA1
OUTA0/OUTA0
OUTA0/OUTA0, OUTA1/OUTA1
Table 3. Channel B Output Routing Configuration (JU8, JU9)
SHUNT POSITION
JU8
Not installed
Not installed
Installed
Installed
JU9
Not installed
Installed
Not installed
Installed
SWITCH CONFIGURATION
1:2 splitter
Dual repeaters
2 x 2 switch
1:2 splitter
INPUT SIGNALS
INB0/INB0
INB0/INB0
INB1/INB1
INB0/INB0
INB1/INB1
INB1/INB1
OUTPUT SIGNALS
OUTB0/OUTB0, OUTB1/OUTB1
OUTB0/OUTB0
OUTB1/OUTB1
OUTB1/OUTB1
OUTB0/OUTB0
OUTB0/OUTB0, OUTB1/OUTB1
_______________________________________________________________________________________
3
MAX9392 Evaluation Kit
Evaluates: MAX9392/MAX9393
Evaluating the MAX9393
The MAX9392 EV kit can be used to evaluate the
MAX9393 by replacing U1 with the MAX9393. Install a
shunt across jumper JU1, a resistor at R1, and a poten-
tiometer at R2, in addition to applying the desired termi-
nation voltage at the VTERM_IN PCB pad to evaluate
the MAX9393. Resistor R1 and potentiometer R2 are
used to provide current sinking capability to the EV kit
circuit when evaluating LVPECL, CML, and other VCC
referenced differential input signals. PCB pad
VERTM_OUT can also be used to set the LVDS output
termination voltages. See Table 4 for proper configura-
tion of jumper JU1 when evaluating the MAX9393.
Table 4. Jumper JU1 Configuration
SHUNT POSITION
Not installed
Installed
EVALUATES
MAX9392
MAX9393
4
_______________________________________________________________________________________
MAX9392 Evaluation Kit
Evaluates: MAX9392/MAX9393
Figure 1. MAX9392 EV Kit Schematic
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5
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