MAX3280E_13 Datasheet, PDF (8/10 Pages) Maxim Integrated Products – ±15kV ESD-Protected 52Mbps, 3V to 5.5V, SOT23 RS-485/RS-422 True Fail-Safe Receivers

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)
R_C
1MΩ
CHARGE-CURRENT
LIMIT RESISTOR
HIGH-
VOLTAGE
DC
SOURCE
Cs
100pF
R_D
1.5kΩ
DISCHARGE
RESISTANCE
STORAGE
CAPACITOR
Figure 3a. Human Body ESD Test Model
DEVICE
UNDER
TEST
I_P 100%
90%
Ir
PEAK-TO-PEAK RINGING
(NOT DRAWN TO SCALE)
AMPERES
36.8%
10%
0
0 _tRL
TIME
t_DL
CURRENT WAVEFORM
Figure 3b. Human Body Model Current Waveform
R_C
50Ω to 100Ω
CHARGE-CURRENT
LIMIT RESISTOR
HIGH-
VOLTAGE
DC
SOURCE
Cs
150pF
R_D
330Ω
DISCHARGE
RESISTANCE
STORAGE
CAPACITOR
DEVICE
UNDER
TEST
I
100%
90%
Figure 4a. IEC 1000-4-2 ESD Test Model
A, 1V/div
10%
tr = 0.7ns to 1ns
t
30ns
60ns
Figure 4b. IEC 1000-4-2 ESD Generator Current Waveform
RO, 2.5V/div
B = GND
10ns
Figure 5. Receiver Propagation Delay Driven by External RS-
485 Device
8
Maxim Integrated