S3040A
SONET/SDH CLOCK RECOVERY UNIT
Figure 11. +3.3 V Single Ended LVPECL Driver to S3040 Reference Clock
Input AC Coupled Termination
+3.3 V
+5 V
Vcc -1.3 V
Z =50 Ω
o
0.01 µF
150 Ω
51 Ω
0.01 µF
Vcc -1.3 V
S3043
155MCK
S3040
REFCLKP/N
Figure 12. +5 V Differential PECL Driver to S3040 Reference Clock
Input AC Coupled Termination
+5 V
+5 V
Vcc -1.3 V
Z =50 Ω
0.01 µF
330 Ω
o
100 Ω
330 Ω
0.01 µF
Z =50 Ω
o
Vcc -1.3 V
S3040
155.52 MHz
OSCILLATOR
REFCLKP/N
Figure 13. Loop Filter Capacitor Connections
82 Ω
82 Ω
CAP1
CAP2
1.0 µF
S3040
12
April 4, 2000 / Revision D