st3237eb STMicroelectronics, st3237eb Datasheet - Page 11

• Manufacturer Part Number: st3237eb
• Description: ? 15 Kv Esd Protected, 1 ?a, 3 To 5.5 V, 250 Kbps Rs-232 Transceiver With Stand-by
• Manufacturer: STMicroelectronics

Figure 9.
Figure 10. IEC 1000-4-2 current waveform
Table 11.
Level
1
2
3
4
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
Characteristics of the ESD generator
Indicated
voltage
2 kV
4 kV
6 kV
8 kV
First peak current
of discharge (±
22.5 A
10%)
7.5 A
15 A
30 A
Rise time with discharge
0.7 to 1ns
0.7 to 1ns
0.7 to 1ns
0.7 to 1ns
switch
Current at 30 ns
(± 30%)
12 A
16 A
4 A
8 A
Current at 60 ns
(± 30%)
2 A
4 A
6 A
8 A
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