General Description
The MAX4983E evaluation kit (EV kit) provides a proven
design to evaluate the MAX4983E high ESD-protected
double-pole/double-throw (DPDT) switch. The EV kit is
designed to demonstrate the MAX4983E ICs used in
USB 2.0 high-speed (480Mbps) switching applications.
The EV kit routes a single USB signal between one of
two type-A USB ports.
The MAX4983E EV kit PCB comes with a MAX4983EEVB+
installed.
Features
oUSB Powered (Cable Included)
oComplete USB 2.0 (480Mbps) Switching Circuit
oOn-Board VBUS Power-Switching Circuit
oLead-Free and RoHS Compliant
oProven PCB Layout
oFully Assembled and Tested
Evaluates: MAX4983E/MAX4984E
MAX4983E Evaluation Kit
________________________________________________________________
Maxim Integrated Products
1
19-4155; Rev 0; 5/08
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
Component Suppliers
DESIGNATION QTY DESCRIPTION
C1, C3, C5, C6 4
0.1µF ±10%, 16V X7R ceramic
capacitors (0603)
Murata GRM188R71C104K
TDK C1608X7R1C104K
C2, C4 2
10µF ±10%, 16V X5R ceramic
capacitors (0805)
Murata GRM21BR61C106K
C7 1
1µF ±10%, 16V X5R ceramic
capacitor (0603)
Murata GRM188R61C105K
TDK C1608X5R1C105K
D1 1 Green LED (0603)
FB1 1 Ferrite bead (0603)
TDK MMZ1608R301A
JU1, JU2, JU3 3 3 pin headers, 0.1in centers
L1, L2 0 Not installed, chip inductors—short
(PCB trace) (0603)
P1 1 USB series-B right-angle PC-mount
receptacle
DESIGNATION QTY DESCRIPTION
P2, P3 2 USB series-A right-angle PC-mount
receptacles
Q1 1 Dual n-channel MOSFET (6 SSOT)
Fairchild Semi FDC6305N
Q2 1 Dual p-channel MOSFET (6 SSOT)
Fairchild Semi FDC6312P
R1 1 270Ω ±5% resistor (0603)
R2, R3 2 10kΩ ±5% resistors (0603)
U1 1
High-speed USB 2.0 switches
(10 UTQFN)
Maxim MAX4983EEVB+
(Top Mark: AAA)
U2 1
3.3V linear regulator (5 SC70)
Maxim MAX8511EXK33+T
(Top Mark: AEI)
— 3 Shunts
— 1 PCB: MAX4983E Evaluation Kit+
SUPPLIER PHONE WEBSITE
Fairchild Semiconductor 888-522-5372 www.fairchildsemi.com
Murata Electronics North America, Inc. 770-436-1300 www.murata-northamerica.com
TDK Corp. 847-803-6100 www.component.tdk.com
PART TYPE
MAX4983EEVKIT+ EV Kit
+
Denotes lead-free and RoHS compliant.
Note: Indicate that you are using the MAX4983E or MAX4984E when contacting these component suppliers.
Quick Start
Recommended Equipment
Before beginning, the following equipment is needed:
• MAX4983E EV kit (USB cable included)
• A user-supplied Windows®2000/XP/Vista®-compati-
ble PC with a spare high-speed USB port
• One USB 2.0 high-speed/full-speed device (i.e., USB
2.0 flash drive)
Procedure
The MAX4983E EV kit is fully assembled and tested.
Follow the steps below to verify board operation:
1) Verify that all jumpers (JU1, JU2, and JU3) are in
their default position, as shown in Table 1.
2) Connect the USB cable from the PC to the type-B
USB port (P1) on the EV kit.
3) Connect the USB 2.0 device source to P2, type-A
USB port.
4) Verify that the USB 2.0 device is detected by the PC.
Detailed Description
The MAX4983E EV kit provides a proven layout for the
MAX4983E and demonstrates the devices used in USB
2.0 high-speed switching applications. The EV kit pro-
vides one type-B (P1) and two type-A (P2, P3) USB
ports. The MAX4983E routes the USB signals between
P1 and one of the two type-A USB ports, depending on
the configuration of jumper JU1.
Jumper JU1 is used to switch between the USB chan-
nels and JU2 is used to enable/disable the internal
switches. The user can switch to one of the two USB
inputs by configuring jumper JU1, as shown in Table. 2.
The EV kit is powered from the type-B USB port (P1)
and provides an on-board regulated 3.3V supply to
power the MAX4983E IC. All USB signal traces are 90Ω
differential controlled-impedance traces.
The EV kit also includes an on-board VBUS power-
switching circuit that routes the USB power from port
P1 to either the P2 or P3 type-A USB ports. See the
On-
Board VBUS Power Switching
section.
USB Switch Control (CB)
The USB signals are routed between P1 and P2 or
between P1 and P3, depending on the state of the
MAX4983E DPDT switch. The DPDT switch is controlled
through jumper JU1 (Table 2).
Device Enable (
EN
)
The MAX4983E is enabled/disabled by configuring
jumper JU2 (Table 3). When disabled, the MAX4983E
switches are placed in a high-impedance state.
Evaluates: MAX4983E/MAX4984E
MAX4983E Evaluation Kit
2 _______________________________________________________________________________________
Table 1. Default Shunt Positions
JUMPER SHUNT POSITION
JU1 1-2
JU2 1-2
JU3 1-2
Table 2. Jumper JU1 Function
*
Default position.
SHUNT
POSITION CB PIN DESCRIPTION
1-2* Connected to
GND
COM1 and COM2 connected
to NC1 and NC2 (P1 P2)
2-3 Connected to
VCC
COM1 and COM2 connected
to NO1 and NO2 (P1 P3)
Table 3. Jumper JU2 Function
*
Default position.
SHUNT
POSITION EN PIN DESCRIPTION
1-2* Connected to
GND
Switches enabled for normal
operation
2-3 Connected to
VCC
Switches are off and in high-
impedance state
Windows and Windows Vista are registered trademarks of Microsoft Corp.
Power Supply (VCC)
The MAX4983E EV kit can be powered by the P1 USB
port (through the 3.3V LDO) or by an external power sup-
ply (VIN). The on-board MAX8511 linear regulator (U2)
provides the regulated 3.3V from the USB bus voltage
(5V) provided at P1. To evaluate the board with an exter-
nal supply, configure jumper JU3 according to Table 4.
On-Board VBUS Power Switching
The EV kit includes a power-switching circuit, designed
with n-channel and p-channel MOSFETs, that routes the
P1 USB bus voltage (V1) to the P2 or P3 USB ports. The
power-switching circuit is controlled by the state of the
CB control pin, which is set through jumper JU1. See
Table 5 for operation.
Evaluates: MAX4983E/MAX4984E
MAX4983E Evaluation Kit
_______________________________________________________________________________________ 3
Table 4. Jumper JU3 Function
*
Default position.
SHUNT
POSITION
VCC
SUPPLY DESCRIPTION
1-2* On-board
supply
Device powered by on-board
linear regulator (3.3V)
2-3 External
supply
Device powered by user-
supplied 2.8V to 5.5V power
supply connected to VIN and
GND pads
Table 5. Relay Operation (Jumper JU1)
*
Default position.
SHUNT
POSITION CB PIN DESCRIPTION
1-2* Connected to
GND
P1 USB bus voltage (V1) routed
to USB port P2 (V2 = V1)
2-3 Connected to
VCC
P1 USB bus voltage (V1) routed
to USB port P3 (V3 = V1)
CB
V1
V2
V3
Figure 1. VBUS Power Switching
Evaluates: MAX4983E/MAX4984E
MAX4983E Evaluation Kit
4 _______________________________________________________________________________________
Figure 2. MAX4983E EV Kit Schematic
Evaluates: MAX4983E/MAX4984E
MAX4983E Evaluation Kit
_______________________________________________________________________________________ 5
Figure 3. MAX4983E EV Kit Component Placement Guide—
Component Side
Figure 5. MAX4983E EV Kit PCB Layout—Inner Layer 2
Figure 4. MAX4983E EV Kit PCB Layout—Component Side
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.
6
___________________
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: MAX4983E/MAX4984E
MAX4983E Evaluation Kit
Figure 6. MAX4983E EV Kit PCB Layout—Inner Layer 3 Figure 7. MAX4983E EV Kit PCB Layout—Solder Side
