Datasheet

Figure 5. Receiver Propagation Delay Driven by External
RS-485 Device
Figure 4b. IEC 1000-4-2 ESD Generator Current Waveform
Figure 4a. IEC 1000-4-2 ESD Test Model
Figure 3b. Human Body Model Current Waveform
Figure 3a. Human Body ESD Test Model
10ns
A, 1V/div
RO, 2.5V/div
B = GND
t
r
= 0.7ns to 1ns
30ns
60ns
t
100%
90%
10%
I
PEAK
I
CHARGE-CURRENT
LIMIT RESISTOR
DISCHARGE
RESISTANCE
STORAGE
CAPACITOR
C
s
150pF
R
C
50Ω to 100Ω
R
D
330Ω
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
AMPERES
CHARGE-CURRENT
LIMIT RESISTOR
DISCHARGE
RESISTANCE
STORAGE
CAPACITOR
C
s
100pF
R
C
1MΩ
R
D
1.5kΩ
HIGH-
VOLTAGE
DC
SOURCE
DEVICE
UNDER
TEST
www.maximintegrated.com
Maxim Integrated │ 8
MAX3280E/MAX3281E/
MAX3283E/MAX3284E
±15kV ESD-Protected 52Mbps, 3V to 5.5V,
SOT23 RS-485/RS-422 True Fail-Safe Receivers
Test Circuits/Timing Diagrams (continued)