General Description
The MAX3345E evaluation kit (EV kit) is a fully assem-
bled and tested surface-mount circuit board that evalu-
ates the MAX3345E USB level translator. The EV kit
includes TSSOP and UCSP™ versions of the
MAX3345E IC, which are configured as a master and
slave unit, respectively. The EV kit is designed to be
driven by the on-board single-ended/differential driver,
or directly connected to a microcontroller (µC) or appli-
cation-specific integrated circuit (ASIC).
Features
♦USB 1.1 Full-Speed Compliant (12Mbps)
♦Single-Supply Operation
♦Low-Profile (1.0mm max) Design
♦On-Board Oscillator
♦Included USB A-B Cable
♦Jumper-Selectable Master/Slave Configuration
♦Fully Assembled and Tested
♦Also Evaluates MAX3344E
Evaluates: MAX3344E/MAX3345E
MAX3345E Evaluation Kit
________________________________________________________________ Maxim Integrated Products 1
DESIGNATION QTY
DESCRIPTION
C1, C3
2
10µF ±20%, 20V tantalum capacitors
(B case)
AVX TAJB106M020
C2, C4
2
10µF ±20%, 10V tantalum capacitors
(B case)
AVX TAJB106M010 or
AVX TAJB106M016
C5–C14
10
1.0µF, 10V X7R ceramic capacitors
(0603)
TDK C1608X5R1A105K or
TDK C1608X7R1A105K
D1
1
Green surface-mount LED
J1, J3
2
16-pin headers
J2
1
USB A connector
Assmann Electronics AU-Y1006
J4
1
USB B connector
Assmann Electronics AU-Y1007
JU1, JU2,
JU3, JU6
4
2-pin headers
JU4, JU5,
JU7–JU14
10
3-pin headers
R1, R2
2
15kΩ ±5% resistors (0603)
Component List
Ordering Information
19-3524; Rev 0; 11/04
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at
1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.
PART
TEMP RANGE
IC PACKAGE
MAX3345EEVKIT
0°C to +70°C 16 TSSOP, 16 UCSP
DESIGNATION QTY DESCRIPTION
R3–R6 4 23.7Ω ±1% resistors (0603)
R7 1 620Ω ±5% resistor (1206)
R8 1 374kΩ ±1% resistor (0603)
R9 1 750kΩ ±1% resistor (0603)
U1 1 MAX3345EEUE (16-pin TSSOP)
U2 1 MAX3345EEBE (16-pin UCSP)
U3 1 MAX603ESA (8-pin SO)
U4 1 MAX604ESA (8-pin SO)
U5 1 Fairchild NC7SZ14P5 (5-pin SC70)
U6 1 Fairchild NC7WZ17P6 (6-pin SC70)
U7 1 Fairchild NC7SZ05M5 (5-pin SOT23)
Y1 1 6.000MHz crystal oscillator module
D+M, D-M,
D+S, D-S 4
Scope probe connectors
(3.5mm diameter)
Tektronics 131-4244-00 [Qty 100]
131-5031-00 [Qty 25]
None 14 Shunts (for JU1–JU14)
None 1 USB A-B cable (5ft or 1.5m)
None 1 MAX3345E EV kit PC board
Note: To evaluate the MAX3344E, request a MAX3344EEUD
and a MAX3344EEBE free sample with the MAX3345EEVKIT.
UCSP is a trademark of Maxim Integrated Products, Inc.
Evaluates: MAX3344E/MAX3345E
Quick Start
Slave Driving Master
Required equipment:
•DC power supply capable of supplying between +6V
and +9V at 1A
•Oscilloscope (>100MHz)
•Two 3.5mm scope probes
•Function generator capable of providing a 6MHz
square wave with an amplitude of 1.8VP-P to 3.3VP-P
The MAX3345E EV kit is fully assembled and tested.
Follow the steps below to verify board operation. Do
not turn on the power supply until all connections
are completed:
1) Ensure that the jumpers are in their default posi-
tions. See Table 1 for shunt positions.
2) Connect the positive output of the function genera-
tor to pin 8 of header J3.
3) Connect the ground of the function generator to
pins 9 and 16 of header J3.
4) Connect the DC power supply to the user pads
marked VSUP and GND.
5) Connect a scope probe to the D+M and the D-M
scope jacks.
6) Set the DC power supply to +6V.
7) Turn on the DC power supply.
8) Plug the USB cable into the USB A socket.
9) Plug the other end of the USB cable into the USB
B socket.
10) The green LED turns on, confirming that a connec-
tion between the master and slave has been made.
11) Turn on the function generator and set it to gener-
ate a 6MHz square wave, with an amplitude of
1.8VP-P.
12) Verify with the oscilloscope that a +3.3V differential
signal is being received on the D+M and D-M lines.
Master Driving Slave
Required equipment:
•DC power supply capable of supplying between +6V
and +9V at 1A
•Oscilloscope (>100MHz)
•Two 3.5mm scope probes
The MAX3345E EV kit is fully assembled and tested.
Follow the steps below to verify board operation.
Do not turn on the power supply until all connec-
tions are completed:
MAX3345E Evaluation Kit
2_______________________________________________________________________________________
SUPPLIER PHONE FAX WEBSITE
3M 888-364-3577 800-321-6329 www.3m.com
Assmann Electronics 877-277-6266 480-897-7255 www.usa-assmann.com
AVX 843-946-0238 843-626-3123 www.avxcorp.com
Fairchild 888-522-5372 408-721-1635 www.fairchildsemi.com
TDK 847-803-6100 847-390-4405 www.component.tdk.com
Component Suppliers
Note: Indicate that you are using the MAX3345E when contacting these component suppliers.
JUMPER
SHUNT
POSITION
DESCRIPTION
JU1 ON 15kΩ resistor on D- line enabled
JU2 ON 15kΩ resistor on D+ line enabled
JU3 OFF Driver disconnected from VPO line of
master (U1)
JU4 OFF Driver disconnected from VMO line of
master (U1)
JU5 1-2 Secondary power supply set to 1.8V
JU6 ON Secondary power supply connected
to circuit
JU7 1-2 Master receive selected
JU8 2-3 Internal 1.5kΩ resistor is disconnected
from the master D+ line
JU9 1-2 Master inputs in differential mode
JU10 2-3 Master suspend disabled
JU11 2-3 Slave transmit selected
JU12 1-2 Internal 1.5kΩ resistor is disconnected
from the slave D+ line
JU13 2-3 Slave inputs in single-ended mode
JU14 2-3 Slave suspend disabled
Table 1. Default Shunt Positions (Slave
Driving Master)
1) Ensure that the jumpers are in their default posi-
tions. See Table 2 for shunt positions.
2) Connect the DC power supply to the user pads
marked VSUP and GND.
3) Connect a scope probe to the D+S and the D-S
scope jacks.
4) Set the DC power supply to +6V.
5) Turn on the DC power supply.
6) Plug the USB cable into the USB A socket.
7) Plug the other end of the USB cable into the USB
B socket.
8) The green LED turns on, confirming that a connec-
tion between the master and slave has been made.
9) Verify with the oscilloscope that a +3.3V differential
signal is being received on the D+S and D-S lines.
Detailed Description
The MAX3345E EV kit provides a proven PC board lay-
out to evaluate the MAX3345E. When connecting the
MAX3345E EV kit to an ASIC or µC, it must be interfaced
to appropriate timing signals for proper operation.
Connect the DC power supply to the VSUP pad, and
connect the ground return to the GND pad. See the
MAX3344E/MAX3345E EV kit schematic (Figure 1). Refer
to the MAX3344E/MAX3345E data sheet for timing
requirements.
On-Board Single-Ended/Differential Driver
The MAX3345E EV kit is shipped with an on-board
(master driving slave) single-ended/differential driver.
This driver is used to evaluate the MAX3345E’s switch-
ing characteristics without the user providing their own
µC or ASIC. The signal is provided by a crystal oscilla-
tor (Y1), which is fed into an inverter (U5) and a buffer
(U6) with Schmitt trigger inputs. The buffer has been
added to equalize the propagation delays from the
crystal oscillator to the differential inputs VPO and
VMO. Jumpers JU3 and JU4 control the operation of
the on-board driver. See Table 3 for shunt positions.
Note: When operated in differential mode, the on-board
differential driver may generate a small skew between
the D+/D- lines. For improved performance, drive the
VPO and VMO pins of the MAX3345E with a precision
differential data source at pins J1–8 (VPO) and J1–9
(VMO).
On-Board Power Supplies
The MAX3345E EV kit contains two on-board power
supplies, that take an unregulated voltage of +6V to +9V
DC and produce a regulated +5V (500mA max) and a
jumper-selectable regulated +1.8V/+3.3V (500mA max).
The +5V supply powers the USB bus, while the +1.8V/
+3.3V supply is an alternative to a user-supplied
µC/ASIC logic power supply. Jumpers JU5 and JU6
control the +1.8V/+3.3V power supply. See Table 4 for
shunt positions.
Evaluates: MAX3344E/MAX3345E
MAX3345E Evaluation Kit
_______________________________________________________________________________________ 3
JUMPER
SHUNT
POSITION
DESCRIPTION
JU1 ON 15kΩ resistor on D- line enabled
JU2 ON 15kΩ resistor on D+ line enabled
JU3 OFF Driver disconnected from VPO line of
master (U1)
JU4 OFF Driver disconnected from VMO line of
master (U1)
JU5 1–2 Secondary power supply set to 1.8V
JU6 ON Secondary power supply connected
to circuit
JU7 1–2 Master receive selected
JU8 2-3 Internal 1.5kΩ resistor is
disconnected from the master D+ line
JU9 1–2 Master inputs in differential mode
JU10 2–3 Master suspend disabled
JU11 2–3 Slave transmit selected
JU12 1–2 Internal 1.5kΩ resistor is
disconnected from the slave D+ line
JU13 2–3 Slave inputs in single-ended mode
JU14 2–3 Slave suspend disabled
Table 2. Shunt Positions (Master Driving
Slave)
JUMPER
SHUNT
POSITION
DESCRIPTION
JU3
JU4
OFF
OFF Driver is disconnected from circuit
JU3
JU4
OFF
2-3
VPO is left for the user to drive,
VMO is grounded
JU3
JU4
OFF
1-2 Invalid jumper setting
JU3
JU4
ON
1-2
Driver is operating in differential
mode
JU3
JU4
ON
2-3
Driver is operating in single-ended
mode
Table 3. On-Board Driver Jumper
Evaluates: MAX3344E/MAX3345E
On-Board Resistive Loads
The MAX3345E EV kit also contains two built-in 15kΩ
loads, which are located on the D+ and D- lines of the
master IC (U1). Jumpers JU1 and JU2 connect these
loads to the line. See Table 5 for shunt positions.
IC Control Jumpers
The MAX3345E EV kit contains jumpers, which allow
the user to manipulate various functions on both the
master and slave (U1 and U2). Jumpers JU7 through
JU14 set the output enable, enumerate, mode, and sus-
pend functions on the master and slave (U1 and U2),
respectively.
Suspend Mode
Jumpers JU10 and JU14 control the suspend function on
the master and slave. See Table 6 for shunt positions.
Mode Select
Jumpers JU9 and JU13 control the mode functions on
the master and slave. See Table 7 for shunt positions.
Enumerate Jumper Settings
Jumper JU8 connects an internal 1.5kΩpullup resistor
from the master D+ line to +3.3V. Jumper JU12 con-
nects an internal 1.5kΩpullup resistor from the slave
D+ line to +3.3V. See Table 8 for shunt positions.
Output Enable Jumper Settings
The output enable jumper selects between a transmit
mode or receive mode. Jumpers JU7 and JU11 control
the output enable for the master and slave. See Table 9
for shunt positions.
MAX3345E Evaluation Kit
4_______________________________________________________________________________________
JUMPER
SHUNT
POSITION
DESCRIPTION
JU1, JU2
ON Master resistive load enabled
JU1, JU2
OFF Master resistive load disabled
Table 5. Resistive Load Jumper
JUMPER
SHUNT
POSITION
DESCRIPTION
JU10 1-2 Suspend function on master
enabled
JU10 2-3 Suspend function on master
disabled
JU14 1-2 Suspend function mode on slave
enabled
JU14 2-3 Suspend function mode on slave
disabled
Table 6. Suspend Jumper Settings
JUMPER
SHUNT
POSITION
DESCRIPTION
JU9 1-2 Master inputs (VPO and VMO)
differential mode
JU9 2-3 Master inputs (VPO and VMO)
single-ended mode
JU13 1-2 Slave inputs (VPO and VMO)
differential mode
JU13 2-3 Slave inputs (VPO and VMO)
single-ended mode
Table 7. Mode Select Jumper Settings
JUMPER
SHUNT
POSITION
DESCRIPTION
JU5 1-2 Output voltage is +1.8V
JU5 2-3 Output voltage is +3.3V
JU6 ON Power supply connected to circuit
JU6 OFF
Power supply disconnected from
circuit.
NOTE: User must supply power
through the user pads marked VUP
and GND.
Table 4. 1.8V/3.3V Power-Supply Jumper
JUMPER
SHUNT
POSITION
DESCRIPTION
JU8 1-2 1.5kΩ resistor is connected to the
master D+ line
JU8 2-3 1.5kΩ resistor is disconnected from
the master D+ line
JU12 1-2 1.5kΩ resistor is connected to the
slave D+ line (full-speed operation)
JU12 2-3 1.5kΩ resistor is disconnected from
the slave D+ line
Table 8. Enumerate Jumper Settings
Note: The MAX3345E is not compatible with low-speed devices.
Evaluating the MAX3344E
The MAX3345E EV kit is also capable of evaluating the
pin-compatible MAX3344E. To evaluate the MAX3344E,
replace U1 with a MAX3344EEUD and replace U2 with
a MAX3344EEBE.
16-Pin Data Connectors J1, J3
The MAX3345E EV kit contains two 16-pin headers for
interfacing with an ASIC or µC. Table 10 lists the func-
tion of each pin. Each header is identical with the
exception that J1 is connected to the master (U1) and
J3 is connected to the slave (U2). Use a 3M connector
with part number CHG-1016-001010-KEP (or equiva-
lent) to interface with this header. See the Component
Suppliers section for contact information. Inputs and
outputs are relative to the EV kit.
Evaluates: MAX3344E/MAX3345E
MAX3345E Evaluation Kit
_______________________________________________________________________________________ 5
JUMPER
SHUNT
POSITION
DESCRIPTION
JU7 1-2 Master receive selected
JU7 2-3 Master transmit selected
JU11 1-2 Slave receive selected
JU11 2-3 Slave transmit selected
Table 9. Output Enable Jumper Settings
PIN SIGNAL I/O FUNCTION
1SUSPEND I 0 = normal operation
1 = suspend operation
2RCV O Receiver output (single-ended)
3VPI O Single-ended output (D+)
4VMI O Single-ended output (D-)
5USB_DET O
USB detect:
0 = device is not connected to the USB bus
1 = device is connected to the USB bus
6MODE I
Mode:
0 = VPO/VMO operate as single-ended inputs
1 = VPO/VMO operate as differential inputs
7ENUMERATE I
Enumerate:
0 = 1.5kΩ resistor disconnected from the D+ line
1 = 1.5kΩ resistor connected to the D+ line (full-speed operation)
8VPO I Single-ended input (D+)
9VMO I Single-ended input (D-)
10 OE I
Output enable:
0 = transmitter enabled
1 = transmitter disabled
11 VL—+1.8V/+3.3V on-board power supply
12–16 GND — Ground
Table 10. J1, J3 Data Connector
Evaluates: MAX3344E/MAX3345E
MAX3345E Evaluation Kit
6_______________________________________________________________________________________
Figure 1. MAX3345E EV Kit Schematic (Sheet 1 of 3)
Evaluates: MAX3344E/MAX3345E
MAX3345E Evaluation Kit
_______________________________________________________________________________________ 7
Figure 1. MAX3345E EV Kit Schematic (Sheet 2 of 3)
Evaluates: MAX3344E/MAX3345E
MAX3345E Evaluation Kit
8_______________________________________________________________________________________
Figure 1. MAX3345E EV Kit Schematic (Sheet 3 of 3)
Evaluates: MAX3344E/MAX3345E
MAX3345E Evaluation Kit
_______________________________________________________________________________________ 9
Figure 2. MAX3345E EV Kit Component Placement Guide—
Component Side
Figure 3. MAX3345E EV Kit PC Board Layout—Component Side
Evaluates: MAX3344E/MAX3345E
MAX3345E Evaluation Kit
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.
Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 ____________________ 10
©2004 Maxim Integrated Products Printed USA is a registered trademark of Maxim Integrated Products.
Figure 4. MAX3345E EV Kit PC Board Layout—Solder Side