PI90LV019
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Test Circuits and Timing Waveforms (continued)
RI+
RI–
Pulse
Generator
+
R
–
RE
50-ohm
CL
50-ohm
VCC
Figure 8. Receiver 3-State Delay Test Circuit
3V
RE
0V
VOH
ROUT
VOH
VOL
1.5V
tPHZ
VOH –0.5
1.5V
tPZH
50%
tPLZ
VOL +0.5
tPZL
50%
Figure 9. Receiver 3-State Delay Waveforms
VOH
GND
VCC
VOL
Typical Bus Application Configurations
DIN
DE
RE
ROUT
DO+
DO+
DO–
DO–
+ RI+
–
RI–
100-ohms
RI+ +
–
RI–
PI90LV019
PI90LV019
Figure 10. Bidirectional Half-Duplex Point-to-Point Applications
DIN
DE
RE
ROUT
DIN
DE
RE
ROUT
06-0018
DO+
RI+
DO–
RI–
+ RI+
DO+
–
RI–
DO–
PI90LV019
PI90LV019
Figure 11. Full-Duplex Point-to-Point Application
7
ROUT
RE
DE
DIN
PS8614C
03/06/06