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 LEDl 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 MAX3341E EV kit provides a proven PC board lay-
out to evaluate the MAX3341E. When connecting the
MAX3341E 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
MAX3341E EV kit schematic (Figure 1). Refer to the
MAX3341E data sheet for timing requirements.
On-Board Single-Ended/Differential Driver
The MAX3341E EV kit is shipped with an on-board
(master driving slave) single-ended/differential driver.
This driver is used to evaluate the MAX3341E’s switch-
ing characteristics without the user providing his/her
own µC or ASIC. The signal is provided by a crystal
oscillator (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.
On-Board Power Supplies
The MAX3341E 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.
On-Board Resistive Loads
The MAX3341E 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.
Evaluates: MAX3341E
MAX3341E Evaluation Kit
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