MAX13450E_1011 Datasheet, PDF (15/17 Pages) Maxim Integrated Products – RS-485 Transceivers with Integrated 100Ω/120Ω Termination Resistors

RS-485 Transceivers with Integrated
100Ω/120Ω Termination Resistors
R_C
1MΩ
CHARGE-CURRENT
LIMIT RESISTOR
R_D
1500Ω
DISCHARGE
RESISTANCE
HIGH-
VOLTAGE
DC
SOURCE
CS
100pF
STORAGE
CAPACITOR
DEVICE
UNDER
TEST
RC
50MΩ TO 100MΩ
RD
330Ω
CHARGE-CURRENT
LIMIT RESISTOR
DISCHARGE
RESISTANCE
HIGH-
VOLTAGE
DC
SOURCE
CS
150pF
STORAGE
CAPACITOR
DEVICE
UNDER
TEST
Figure 11a. Human Body ESD Test Model
IP 100%
90%
Ir
PEAK-TO-PEAK RINGING
(NOT DRAWN TO SCALE)
AMPS
36.8%
10%
0
0 _tRL
TIME
t_DL
CURRENT WAVEFORM
Figure 11b. Human Body Current Waveform
Figure 11c. IEC 61000-4-2 ESD Test Model
I
100%
90%
10%
tr = 0.7ns TO 1ns
30ns
t
60ns
Figure 11d. IEC 61000-4-2 ESD Generator Current Waveform
Typical Application Circuits
Z
D
Y
B
R
A
B
R
A
Z
D
Y
MAX13450E
MASTER
R
D
R
D
R
D
MAX13450E
END SLAVE
SLAVE 1
Figure 12. Full-Duplex, Multidrop (MAX13450E)
SLAVE 2
SLAVE N
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