19-4581; Rev 0; 4/09
MAX4989 Evaluation Kit
General Description
The MAX4989 evaluation kit (EV kit) provides a proven
design to evaluate the MAX4989 Hi-Speed 2-of-4 USB
2.0 crosspoint switch. The EV kit contains two sub cir-
cuits, a typical USB crosspoint switch application (top
half), and a test circuit (bottom half).
The USB crosspoint switch application circuit is USB
powered by the USB host. USB input/output connectors
are also provided to easily interface with USB devices.
All USB signal traces are 90I differential controlled-
impedance traces.
A separate test circuit is also provided at the bottom of
the MAX4989 EV kit for eye diagram evaluation using
SMA connections and 90I controlled-impedance traces.
The MAX4989 EV kit PCB comes with two MAX4989ETD+
devices installed. The MAX4989ETD+ is available in a
lead(Pb)-free 14-pin, 3mm x 3mm TDFN package.
PART
MAX4989EVKIT+
S
USB Powered (Cable Included)
S
Eye Diagram Test Circuit with SMA Input/Output
S
Jumper-Selectable USB Channel Connection
S
Lead(Pb)-Free and RoHS Compliant
S
Proven PCB Layout
S
Fully Assembled and Tested
Features
S
USB Connectors for Inputs and Outputs
Evaluates: MAX4989
Ordering Information
TYPE
EV Kit
+Denotes
lead(Pb)-free and RoHS compliant.
Component List
DESIGNATION
C1–C4
QTY
4
DESCRIPTION
0.1FF
Q10%,
16V X7R ceramic
capacitors (0603)
TDK C1608X7R1C104K
20V, 500mA Schottky diodes
(SOD123)
Fairchild Semi MBR0520L
USB type-B, right-angle PC-mount
receptacles
USB type-A, right-angle
PC-mount receptacles
3-pin headers
Orange LEDs (0603)
DESIGNATION
R1, R2
R3–R6
SMA1+, SMA1-,
SMA2+, SMA2-
U1, U2
—
—
—
*EP
= Exposed pad.
QTY
2
0
4
2
6
2
1
DESCRIPTION
680I
Q5%
resistors (0603)
Not installed, resistors (0603)
Edge-mount receptacle SMA
connectors
USB 2.0 crosspoint switches
(14 TDFN-EP*)
Maxim MAX4989ETD+
Shunts
USB high-speed A-to-B cables, 6ft
PCB: MAX4989 EVALUATION KIT+
D1, D2, D3
J1, J2
J3, J4
JU1–JU6
LED1, LED2
3
2
2
6
2
Component Suppliers
SUPPLIER
Fairchild Semiconductor
TDK Corp.
PHONE
888-522-5372
847-803-6100
WEBSITE
www.fairchildsemi.com
www.component.tdk.com
Note:
Indicate that you are using the MAX4989 when contacting these component suppliers.
_______________________________________________________________
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.
MAX4989 Evaluation Kit
Evaluates: MAX4989
__________________________Quick Start
•
•
•
MAX4989 EV kit (2 USB cables included)
__Detailed Description of Hardware
The MAX4989 evaluation kit (EV kit) provides a proven
design to evaluate the MAX4989 Hi-Speed 2-of-4 USB
2.0 crosspoint switch. The EV kit contains two sub cir-
cuits, a typical USB crosspoint switch application (top
half), and a test circuit (bottom half).
The application circuit is located at the top of the board.
Jumpers JU1, JU2, and JU3 are used to control the
switch connection (see Table 1). The MAX4989 is pow-
ered from the USB port that is connected to the USB
host. To use a user-supplied power supply, connect a 5V
supply to the VCC and GND pads. All signal traces in the
USB application circuit are 90I differential controlled-
impedance traces.
A separate test circuit is also provided at the bottom of
the MAX4989 EV kit for timing critical tests such as eye
diagrams. The test circuit is powered by applying a 2.7V
to 5.5V power supply at the VCC2 and GND2 pads.
Required Equipment
User-supplied Windows
M
2000/XP
M
or Windows
Vista
M
PC with a spare USB port
User-supplied USB signal source (e.g., USB 2.0
flash drive)
Application Circuit
Note:
In the following sections, text in
bold and under-
lined
refers to items from the Windows operating system.
The MAX4989 EV kit is fully assembled and tested.
Follow the steps below to verify board operation:
1)
2)
3)
4)
5)
6)
7)
Place a shunt across pins 2-3 of jumper JU1.
Place a shunt across pins 1-2 of jumper JU2.
Place a shunt across pins 2-3 of jumper JU3.
Connect the USB cable from the PC to the J1 USB
connector on the EV kit.
Verify that LED1 turns on.
Connect the USB signal source to the J3 USB con-
nector on the EV kit.
Go to the Windows
System Properties
window
(Windows logo key + Pause Break key from key-
board) to locate and open the
Device Manager.
Under the
Universal Serial Bus Controllers
subject
directory, verify that the USB 2.0 signal source is
recognized through the USB port.
Procedure
Test Diagram Circuit
Table 1. Jumper Settings
SHUNT POSITION
JU1
2-3
1-2
2-3
1-2
2-3
1-2
2-3
1-2*
JU2
2-3
2-3
1-2
1-2
2-3
2-3
1-2
1-2*
JU3
2-3
2-3
2-3
2-3
1-2
1-2
1-2
1-2*
DESCRIPTION
Shutdown
Illegal state
J1 and J3 connected
J2 and J3 connected
J2 and J4 connected
J1 and J4 connected
Illegal state
Shutdown
*Default position.
Table 2. Test Circuit Jumper Settings
SHUNT POSITION
JU4
2-3
JU5
1-2
JU6
2-3
DESCRIPTION
On
Off
All other combinations
Windows, Windows XP, and Windows Vista are registered
trademarks of Microsoft Corp.
2
______________________________________________________________________________________
MAX4989 Evaluation Kit
Evaluates: MAX4989
Figure 1a. MAX4989 EV Kit Schematic (Sheet 1 of 2)
_______________________________________________________________________________________
3
MAX4989 Evaluation Kit
Evaluates: MAX4989
Figure 1b. MAX4989 EV Kit Schematic (Sheet 2 of 2)
4
______________________________________________________________________________________
MAX4989 Evaluation Kit
Evaluates: MAX4989
Figure 2. MAX4989 EV Kit Component Placement Guide—Component Side
_______________________________________________________________________________________
5
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