Test Circuits and Timing Waveforms (continued)
RI+
+
R
RI–
–
Pulse
RE
Generator
50Ω
PI90LVB010
Single Bus LVDS Transceiver
CL
RL
VCC
Figure 8. Receiver Three-State Delay Test Circuit
3V
RE
0V
VOH
ROUT
VOH
VOL
1.5V
tPHZ
VOH –0.5
tPLZ
VOL +0.5
1.5V
tPZH
50%
tPZL
50%
VOH
GND
VCC
VOL
Figure 9. Receiver Three-State Delay Waveforms
Typical Bus Application Configurations
DIN
DE
RE
ROUT
DO+
54Ω
DO–
RI+
+
– RI–
DO+
54Ω
DO–
RI+
+
RI– –
DIN
DE
RE
ROUT
Figure 10. Bidirectional Half-Duplex Point-to-Point Applications
DIN
/ROUT
DIN
/ROUT
DIN
/ROUT
DIN
/ROUT
54Ω
54Ω
DIN
/ROUT
DIN
/ROUT
DIN
/ROUT
Figure 11. Multipoint Bus Applications
7
PS8662A
09/03/04