SP526_06 Datasheet, PDF (20/24 Pages) Sipex Corporation – WAN Multi-Mode Serial Transceiver

R_C
DC Power
Source
SW1
Contact-Discharge Module
R_S
R_V
SW2
C_S
Device
Under
Test
RS and RV add up to 330Ω for IEC1000-4-2
Figure 36. ESD Test Circuit for IEC1000-4-2
of the ESD current when the ESD source is
applied to the connector pins. The test circuit for
IEC1000-4-2 is shown on Figure 36. There are
two methods within IEC1000-4-2, the Air
Discharge method and the Contact Discharge
method.
With the Air Discharge Method, an ESD voltage
is applied to the equipment under test (EUT)
through air. This simulates an electrically charged
person ready to connect a cable onto the rear of
the system only to find an unpleasant zap just
before the person touches the back panel. The
high energy potential on the person discharges
through an arcing path to the rear panel of the
system before he or she even touches the system.
This energy, whether discharged directly or
through air, is predominantly a function of the
discharge current rather than the discharge
voltage. Variables with an air discharge such as
approach speed of the object carrying the ESD
30A
15A
0A
t=0nS
t
t=30nS
Figure 37. ESD Test Waveform for IEC1000-4-2
Device Pin
Tested
Driver Outputs
Receiver Inputs
Human Body
Model
±15kV
±15kV
Table 2. Transceiver ESD Tolerance Levels
IEC1000-4-2
Air Discharge Direct Contact
±15kV
±15kV
±8kV
±8kV
Level
4
4
Rev: C Date:2/1/06
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SP526 Multi–Mode Serial Transceiver
20
© Copyright 2006 Sipex Corporation