Datasheet

RS-485 Transceivers with Integrated
100 Ω /120 Ω Termination Resistors
MAX13450E/MAX13451E
______________________________________________________________________________________ 15
Figure 11a. Human Body ESD Test Model
Figure 11b. Human Body Current Waveform
Figure 11c. IEC 61000-4-2 ESD Test Model
Figure 11d. IEC 61000-4-2 ESD Generator Current Waveform
Figure 12. Full-Duplex, Multidrop (MAX13450E)
Typical Application Circuits
CHARGE-CURRENT
LIMIT RESISTOR
DISCHARGE
RESISTANCE
STORAGE
CAPACITOR
C
S
100pF
R
C
1M
Ω
R
D
1500
Ω
HIGH-
VOLTAGE
DC
SOURCE
DEVICE
UNDER
TEST
I
P
100%
90%
36.8%
t
RL
TIME
t
DL
CURRENT WAVEFORM
PEAK-TO-PEAK RINGING
(NOT DRAWN TO SCALE)
I
r
10%
0
0
AMPS
CHARGE-CURRENT
LIMIT RESISTOR
DISCHARGE
RESISTANCE
STORAGE
CAPACITOR
C
S
150pF
R
C
50MΩ TO 100MΩ
R
D
330Ω
HIGH-
VOLTAGE
DC
SOURCE
DEVICE
UNDER
TEST
t
r
= 0.7ns TO 1ns
30ns
60ns
t
100%
90%
10%
I
PEAK
I
MAX13450E
D
Z
Y
B
A
B
A
Z
Y
R
MAX13450E
R
D
D
SLAVE 1
MASTER END SLAVE
R
D
SLAVE 2
R
D
SLAVE N
R