MAX489ECSD-T Datasheet, PDF (10/16 Pages) Maxim Integrated Products – ±15kV ESD-Protected, Slew-Rate-Limited, Low-Power, RS-485/RS-422 Transceivers

MAX481E/MAX483E/MAX485E/
MAX487E–MAX491E/MAX1487E
±15kV ESD-Protected, Slew-Rate-Limited,
Low-Power, RS-485/RS-422 Transceivers
R_C 1M
R_D 1500Ω
CHARGE CURRENT
LIMIT RESISTOR
DISCHARGE
RESISTANCE
HIGH
VOLTAGE
DC
SOURCE
Cs
100pF
STORAGE
CAPACITOR
Figure 4. Human Body ESD Test Model
R_C 50M to 100M R_D 330Ω
CHARGE CURRENT
LIMIT RESISTOR
DISCHARGE
RESISTANCE
HIGH-
VOLTAGE
DC
SOURCE
Cs
150pF
STORAGE
CAPACITOR
Figure 6. IEC1000-4-2 ESD Test Model
DEVICE
UNDER
TEST
I_P 100%
90%
AMPERES
36.8%
10%
0
0 _tRL
Ir
PEAK-TO-PEAK RINGING
(NOT DRAWN TO SCALE)
TIME
t_DL
CURRENT WAVEFORM
Figure 5. Human Body Model Current Waveform
I
100%
90%
DEVICE
UNDER
TEST
10%
tr = 0.7ns to 1ns
t
30ns
60ns
Figure 7. IEC1000-4-2 ESD Generator Current Waveform
Y
V_OD
Z
R
R
V_OC
Figure 8. Driver DC Test Load
RECEIVER ^{TEST POINT}
OUTPUT
C_RL
15pF
1k
1k
V_CC
S1
S2
Figure 9. Receiver Timing Test Load
10
Maxim Integrated