±1 5 k V ES D-P ro t e c t e d , S in g le /Du a l/Oc t a l,
CMOS S w it c h De b o u n c e rs
R 1M
C
R 1500Ω
D
R 50M to 100M
C
R 330Ω
D
DISCHARGE
RESISTANCE
CHARGE-CURRENT
LIMIT RESISTOR
DISCHARGE
RESISTANCE
CHARGE CURRENT
LIMIT RESISTOR
HIGH-
VOLTAGE
DC
DEVICE
UNDER
TEST
HIGH-
VOLTAGE
DC
DEVICE
UNDER
TEST
C
100pF
STORAGE
CAPACITOR
s
C
s
150pF
STORAGE
CAPACITOR
SOURCE
SOURCE
Figure 6a. Human Body ESD Test Model
Figure 7a. IEC1000-4-2 ESD Test Model
I
I 100%
P
90%
PEAK-TO-PEAK RINGING
(NOT DRAWN TO SCALE)
I
r
100%
90%
AMPERES
36.8%
10%
0
TIME
0
t
RL
7/MAX618
t
DL
CURRENT WAVEFORM
10%
Figure 6b. Human Body Current Waveform
t
t = 0.7ns to 1ns
r
30ns
damage. The ESD structures withstand high ESD in all
s ta te s : norma l op e ra tion, s hutd own, a nd p owe re d
down. After an ESD event, the MAX6816/MAX6817/
MAX6818 keep working without latchup, whereas other
s olutions c a n la tc h a nd mus t b e p owe re d d own to
remove latchup.
60ns
Figure 7b. IEC1000-4-2 ESD Generator Current Waveform
Human Body Model
Figure 6a shows the Human Body Model and Figure 6b
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 inter-
e s t, whic h is the n d is c ha rg e d into the te s t d e vic e
through a 1.5kΩ resistor.
ESD protection can be tested in various ways; these
products are characterized for protection to the follow-
ing limits:
1) ±15kV using the Human Body Model
2) ±8kV using the Contact-Discharge method specified
in IEC1000-4-2
3) ±15kV using IEC1000-4-2’s Air-Gap method.
IEC1000-4-2
The IEC1000-4-2 standard covers ESD testing and per-
formance of finished equipment; it does not specifically
re fe r to inte g ra te d c irc uits . The MAX6816/
MAX6817/MAX6818 help you design equipment that
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.
6
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