si5351 Silicon Laboratories, si5351 Datasheet - Page 14

• Manufacturer Part Number: si5351
• Description: Si5350a Factory-programmable Cmos Clock Generator
• Manufacturer: Silicon Laboratories

Si5351A/B/C
5.2. Replacing Crystals, Crystal Oscillators, and VCXOs
The Si5351B combines free-running clock generation and a VCXO in a single package for cost sensitive video
applications. An example is shown in Figure 12.
5.3. Replacing Crystals, Crystal Oscillators, and PLLs
The Si5350C generates synchronous clocks for applications that require a fully integrated PLL instead of a VCXO.
Because of its dual PLL architecture, the Si5351C is capable of generating both synchronous and free-running
clocks. An example is shown in Figure 13.
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Figure 12. Using the Si5351B to Replace Crystals, Crystal Oscillators, VCXOs, and PLLs
Figure 13. Using the Si5351C to Replace Crystals, Crystal Oscillators, and PLLs
Note: F
54 MHz
27 MHz
25 MHz
BW
= 10 kHz
CLKIN
VC
XA
XB
XA
XB
Si5351B
Si5351C
OSC
OSC
VCXO
PLL
PLL
PLL
Rev. 0.1
Synth
Synth
Synth
Synth
Synth
Synth
Synth
Synth
Synth
Synth
Synth
Synth
Multi
Multi
Multi
Multi
Multi
Multi
Multi
Multi
Multi
Multi
Multi
Multi
0
1
2
3
4
5
0
1
2
3
4
5
CLK0
CLK1
CLK2
CLK3
CLK4
CLK5
CLK0
CLK1
CLK2
CLK3
CLK4
CLK5
Synchronous
Free-running
Synchronous
74.25/1.001 MHz
Free-running
74.25/1.001 MHz
125 MHz
48 MHz
28.322 MHz
74.25 MHz
24.576 MHz
125 MHz
48 MHz
28.322 MHz
74.25 MHz
24.576 MHz
Clocks
Clocks
Clocks
Clocks
Video/Audio
Video/Audio
Controller
Processor
Controller
Processor
Ethernet
Ethernet
HDMI
HDMI
PHY
USB
PHY
USB
Port
Port