PI90LVB010
Single Bus LVDS Transceiver
Test Circuits and Timing Waveforms
(continued)
DO+
2.0
0.8
R
L
/2
Pulse Generator
DE
50Ω
C
L
D
IN
R
L
/2
+1.2V
DO–
C
L
Figure 4. Driver Three-State Delay Test Circuit
3V
DE
0V
1.5V
tPHZ
1.5V
tPZH
50%
50%
1.2V
DO – (DI=L) VOH
DO + (DI=H)
tPLZ
DO – (DI=H)
DO + (DI=L)
VOH
VOL
50%
tPZL
1.2V
50%
Figure 5. Driver Three-State Delay Waveforms
RI+
Pulse Generator
RI–
+
–
C
L
RO
50Ω
50Ω
Figure 6. Receiver Propagation Delay and Transistion Time Test Circuit
RI+
0V (Differential)
RI–
tPLH
1.5V
VO
20%
tTLH
tTHL
80%
VID = 200mV
(1.2V CM)
+1.1V
tPHL
80%
1.5V
20%
+1.3V
Figure 7. Receiver Propagation Delay and Transistion Time Waveforms
6
PS8662A
09/03/04