±±15k ESD-Protected, Fail-Safe, High-Speed (±0Mbps),
Slew-Rate-Limited RS-481/RS-422 Transceivers
R
R
C
D
1MΩ
1500Ω
DISCHARGE
RESISTANCE
CHARGE-CURRENT
LIMIT RESISTOR
B
A
RECEIVER
OUTPUT
HIGH-
VOLTAGE
DC
DEVICE
UNDER
TEST
V
ID
R
R
ATE
C
s
100pF
STORAGE
CAPACITOR
SOURCE
Figure 13. Receiver Propagation Delay Test Circuit
Figure 14a. Human Body ESD Test Model
I
P
100%
90%
PEAK-TO-PEAK RINGING
(NOT DRAWN TO SCALE)
I
r
AMPERES
36.8%
20dB/div
10%
0
TIME
0
t
RL
t
DL
CURRENT WAVEFORM
0Hz
100kHz/div
1MHz
Figure 14b. Human Body Current Waveform
Figure 15. Driver Output Waveform and FFT Plot of
MAX3086E/MAX3087E/MAX3088E, and MAX3089E with
SRL = GND, Transmitting a 20kHz Signal
A
B
A
B
20dB/div
20dB/div
0Hz
100kHz/div
1MHz
0Hz
100kHz/div
1MHz
Figure 16. Driver Output Waveform and FFT Plot of
MAX3083E/MAX3084E/MAX3085E, and MAX3089E
Figure 17. Driver Output Waveform and FFT Plot of
MAX3080E/MAX3081E/MAX3082E, and MAX3089E
with SRL = Unconnected, Transmitting a 20kHz Signal
with SRL = V
Transmitting a 20kHz Signal
CC,
______________________________________________________________________________________ 17
MAXIM [ MAXIM INTEGRATED PRODUCTS ]
