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MAX3397E Evaluation Kit
Quick Start
Recommended Equipment
Before beginning, the following equipment is needed:
? One +5V DC power supply
? One +3.3V DC power supply
? One function generator
? One oscilloscope
Procedure
The MAX3397E EV kit is fully assembled and tested.
Follow the steps below to verify board operation.
Caution: Do not turn on power supplies until all con-
nections are completed.
1) Turn off the +5V DC and +3.3V DC power supplies.
2) Turn off the function generator.
3) Make sure the shunt is on pin 1-2 of JU1.
4) Connect the positive (+) terminal of the +5V DC
power supply to the VCC pad and connect the neg-
ative (-) terminal to the adjacent GND pad.
5) Connect the positive (+) terminal of the +3.3V DC
power supply to the VL pad and connect the nega-
tive (-) terminal to the adjacent GND pad.
6) Connect the positive (+) terminal of the function
generator to I/OVCC1 pad of the MAX3397E EV kit.
Connect the negative (-) terminal of the DC signal
source to the GND pad.
7) Turn on the +5V DC and +3.3V DC power supplies.
8) Turn on the function generator.
9) Set the function generator to a 5V P-P , 1MHz, 2.5V
DC offset square wave.
10) Use the oscilloscope to measure the I/O V L1 output at
pin 5. Verify that the waveform is a 1MHz square wave
and is approximately 3.3 V P-P with 1.625V DC offset.
Detailed Description of Hardware
The MAX3397E is an ESD-protected, dual bidirectional
low-level translator. The MAX3397E EV kit board pro-
vides a proven layout for evaluating the MAX3397E.
The EV kit comes with a MAX3397EELA+ installed.
Enable/Shutdown Control
Place the shunt on pin 1-2 of JU1 (as shown in Table 1)
to drive the EN pin of the MAX3397E high and to enable
the device. Place the shunt on pin 2-3 of JU1 to drive
the EN pin of the MAX3397E low and to put the device
in shutdown state.
Table 1. Jumper JU1 Configuration
JUMPER SHUNT POSITION DESCRIPTION
1-2* Enable
JU1
2-3 Shutdown
*Default position.
Power Supply
The MAX3397E accepts V L from +1.2V to +5.5V and
V CC from +1.65V to +5.5V. The voltage on V L must be
less than or equal to the voltage on V CC .
When V L is connected and V CC is disconnected or
connected to ground, the device enters shutdown
mode. In this mode, I/O V L can still be driven without
damage to the device; however, data does not translate
from I/O V L to I/O V CC . If V CC falls more than +0.8V
(typ) below V L , the device disconnects the pullup resis-
tors at I/O V L and I/O V CC . To achieve the lowest possi-
ble supply current from V L when V CC is disconnected,
it is recommended that the voltage at the V CC supply
input be approximately equal to GND.
2
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