MAX14945 Datasheet, PDF (18/21 Pages) Maxim Integrated Products – 2.75kVRMS Isolated 500kbps Half-Duplex RS-485

MAX14945
2.75kV_RMS Isolated 500kbps Half-Duplex RS-485/
RS-422 Transceiver with ±30kV ESD Protection
RC
1MΩ
RD
1500Ω
CHARGE-CURRENT-
LIMIT RESISTOR
DISCHARGE
RESISTANCE
HIGH-
VOLTAGE
DC
SOURCE
Cs
100pF
STORAGE
CAPACITOR
Figure 10. Human Body ESD Test Model
DEVICE
UNDER
TEST
IP 100%
90%
AMPS
36.8%
10%
0
0 _tRL
Ir
PEAK-TO-PEAK RINGING
(NOT DRAWN TO SCALE)
TIME
t_DL
CURRENT WAVEFORM
Figure 11. Human Body Current Waveform
RC
50MΩ TO 100MΩ
RD
330Ω
CHARGE-CURRENT-
LIMIT RESISTOR
DISCHARGE
RESISTANCE
HIGH-
VOLTAGE
DC
SOURCE
Cs
150pF
STORAGE
CAPACITOR
DEVICE
UNDER
TEST
Figure 12. IEC 61000-4-2 ESD Test Model
I
100%
90%
10%
tr = 0.7ns TO 1ns
30ns
t
60ns
Figure 13. IEC 61000-4-2 ESD Generator Current Waveform
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