Silicon Laboratories SI5351A/B/C - Manual (Page 18)

S i 5 3 5 1 A / B / C
18 Preliminary Rev. 0.95
5.2. Si5351 Application Examples
The Si5351 is a versatile clock generator which serves a wide variety of applications. The following examples show
how it can be used to replace crystals, crystal oscillators, VCXOs, and PLLs.
5.3. Replacing Crystals and Crystal Oscillators
Using an inexpensive external crystal, the Si5351A can generate up to 8 different free-running clock frequencies
for replacing crystals and crystal oscillators. A 3-output version packaged in a small 10-MSOP is also available for
applications that require fewer clocks. An example is shown in Figure 13.
Figure 13. Using the Si5351A to Replace Multiple Crystals, Crystal Oscillators, and PLLs
48 MHz USB
Controller
28.322 MHz
125 MHz
Video/Audio
Processor
74.25/1.001 MHz
24.576 MHz
OSC
XA
XB
CLK0
CLK1
CLK2
CLK3
CLK4
CLK5
PLL
Multi
Synth
0
Multi
Synth
1
Multi
Synth
2
74.25 MHz
27 MHz
Si5351A
Multi
Synth
3
Multi
Synth
4
Multi
Synth
5
Multi
Synth
7
HDMI
Port
Ethernet
PHY
Multi
Synth
6
22.5792 MHz CLK6
33.3333 MHz CLK7
CPU
Note: Si5351A replaces crystals, XOs, and PLLs.