±1 5 k V ES D-P ro t e c t e d , S le w -Ra t e -Lim it e d ,
Lo w -P o w e r, RS -4 8 5 /RS -4 2 2 Tra n s c e ive rs
R
C
1M
R 1500Ω
D
I 100%
P
90%
PEAK-TO-PEAK RINGING
(NOT DRAWN TO SCALE)
I
r
DISCHARGE
RESISTANCE
CHARGE CURRENT
LIMIT RESISTOR
AMPERES
HIGH
VOLTAGE
DC
DEVICE
UNDER
TEST
C
STORAGE
CAPACITOR
s
36.8%
100pF
SOURCE
10%
0
TIME
0
t
RL
t
DL
CURRENT WAVEFORM
Figure 4. Human Body ESD Test Model
Figure 5. Human Body Model Current Waveform
I
100%
90%
R
C
50M to 100M
R 330Ω
D
DISCHARGE
RESISTANCE
CHARGE CURRENT
LIMIT RESISTOR
HIGH-
VOLTAGE
DC
DEVICE
UNDER
TEST
C
STORAGE
CAPACITOR
s
150pF
SOURCE
10%
t
t
r
= 0.7ns to 1ns
30ns
60ns
Figure 6. IEC1000-4-2 ESD Test Model
Figure 7. IEC1000-4-2 ESD Generator Current Waveform
Y
1k
TEST POINT
R
RECEIVER
OUTPUT
V
CC
S1
S2
V
OD
C
RL
1k
15pF
R
V
OC
Z
Figure 8. Driver DC Test Load
Figure 9. Receiver Timing Test Load
35–9/MAX1487E
10 ______________________________________________________________________________________
MAXIM [ MAXIM INTEGRATED PRODUCTS ]
