ST3237EB_07 Datasheet, PDF (11/18 Pages) STMicroelectronics – ± 15 kV ESD protected, 1 μA, 3 to 5.5 V, 250 kbps RS-232 transceiver with stand-by

ST3237EB
Application note
Figure 9.
The second model is IEC 1000-4-2 and is used to simulate the reaction of the device on
equipment when subjected to electrostatic discharges, which may occur from personnel to
objects near vital instrumentation. Direct (Contact) and indirect (Air Gap) applications of
discharges to the equipment under test (EUT) are possible. Test characteristics are shown
in circuit, waveform and table below.
IEC 1000-4-2 circuit
Figure 10. IEC 1000-4-2 current waveform
Table 11.
Level
1
2
3
4
Characteristics of the ESD generator
Indicated
voltage
First peak current
of discharge (±
10%)
Rise time with discharge Current at 30 ns Current at 60 ns
switch
(± 30%)
(± 30%)
2 kV
7.5 A
0.7 to 1ns
4A
2A
4 kV
15 A
0.7 to 1ns
8A
4A
6 kV
22.5 A
0.7 to 1ns
12 A
6A
8 kV
30 A
0.7 to 1ns
16 A
8A
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