MAX13430E_14 Datasheet, PDF (16/20 Pages) Maxim Integrated Products – RS-485 Transceivers with Low-Voltage Logic Interface

MAX13430E–MAX13433E
RS-485 Transceivers with Low-Voltage
Logic Interface
ESD Test Conditions
ESD performance depends on a variety of conditions.
Contact Maxim for a reliability report that documents
test setup, test methodology, and test results.
Human Body Model
Figure 10a shows the Human Body Model, and Figure
10b shows the current waveform it generates when dis-
charged into a low impedance. This model consists of a
100pF capacitor charged to the ESD voltage of interest,
which is then discharged into the test device through a
1.5kΩ resistor.
IEC 61000-4-2
The IEC 61000-4-2 standard covers ESD testing and
performance of finished equipment. However, it does
not specifically refer to integrated circuits. The
MAX13430E family of devices helps you design equip-
ment to meet IEC 61000-4-2, without the need for addi-
tional ESD-protection components.
The major difference between tests done using the
Human Body Model and IEC 61000-4-2 is higher peak
current in IEC 61000-4-2 because series resistance is
lower in the IEC 61000-4-2 model. Hence, the ESD with-
stand voltage measured to IEC 61000-4-2 is generally
lower than that measured using the Human Body
Model. Figure 10c shows the IEC 61000-4-2 model, and
Figure 10d shows the current waveform for IEC 61000-
4-2 ESD Contact Discharge test.
R_C
R_D
1MΩ
1500Ω
CHARGE-CURRENT-
LIMIT RESISTOR
DISCHARGE
RESISTANCE
HIGH-
VOLTAGE
DC
SOURCE
Cs
100pF
STORAGE
CAPACITOR
Figure 10a. Human Body ESD Test Model
DEVICE
UNDER
TEST
I_P 100%
90%
AMPS
36.8%
10%
0
0 _tRL
Ir
PEAK-TO-PEAK RINGING
(NOT DRAWN TO SCALE)
TIME
t_DL
CURRENT WAVEFORM
Figure 10b. Human Body Current Waveform
R_C
50MΩ TO 100MΩ
R_D
330Ω
CHARGE-CURRENT-
LIMIT RESISTOR
DISCHARGE
RESISTANCE
HIGH-
VOLTAGE
DC
SOURCE
Cs
150pF
STORAGE
CAPACITOR
Figure 10c. IEC 61000-4-2 ESD Test Model
DEVICE
UNDER
TEST
I
100%
90%
10%
tr = 0.7ns TO 1ns
30ns
t
60ns
Figure 10d. IEC 61000-4-2 ESD Generator Current Waveform
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Maxim Integrated