MAX3243E
3-V TO 5.5-V MULTICHANNEL RS-232 LINE DRIVER/RECEIVER
WITH ±15-kV IEC ESD PROTECTION
www.ti.com
SLLS657A–APRIL 2005–REVISED JUNE 2005
APPLICATION INFORMATION
1.5
V
HBM
= 2 kV
1.0
0.5
DUT = 10-V 1-Ω Zener Diode
0.0
0
50
100
150
200
Time (ns)
Figure 8. Typical HBM Current Waveform
IEC61000-4-2 (Formerly Known as IEC1000-4-2)
Unlike the HBM, MM, and CDM ESD tests that apply to component level integrated circuits, the IEC61000-4-2 is
a system-level ESD testing and performance standard that pertains to the end equipment. The MAX3243E is
designed to enable the manufacturer in meeting the highest level (Level 4) of IEC61000-4-2 ESD protection with
no further need of external ESD protection circuitry. The more stringent IEC test standard has a higher peak
current than the HBM, due to the lower series resistance in the IEC model.
Figure 9 shows the IEC61000-4-2 model, and Figure 10 shows the current waveform for the corresponding
±8-kV Contact-Discharge (Level 4) test. This waveform is applied to a probe that has been connected to the
DUT. On the other hand, the corresponding ±15-kV (Level 4) Air-Gap Discharge test involves approaching the
DUT with an already energized probe.
50−100 MΩ
330 Ω
R
C
R
D
High-Voltage
DC Source
+
−
C
S
150 pF
DUT
Figure 9. Simplified IEC61000-4-2 ESD Test Circuit
14
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