SI5350B-B Datasheet, PDF (9/32 Pages) Silicon Laboratories – FACTORY-PROGRAMMABLE ANY-FREQUENCY CMOS CLOCK GENERATOR

Si5350B-B
2. Typical Application
2.1. Si5350B Replaces Multiple Clocks and XOs
The Si5350B is a clock generation device that provides both synchronous and free-running clocks for applications
where power, board size, and cost are critical. An application where both free-running and synchronous clocks are
required is shown in Figure 1.
XA
27 MHz
OSC
PLL
XB
VC
VCXO
Si5350B
Multi
Synth
0
Multi
Synth
1
Multi
Synth
2
Multi
Synth
3
Multi
Synth
4
Multi
Synth
5
CLK0
CLK1
CLK2
125 MHz
48 MHz
28.322 MHz
CLK3
74.25 MHz
CLK4 _{74.25/1.001 MHz}
CLK5
24.576 MHz
Ethernet
PHY
USB
Controller
HDMI
Port
Video/Audio
Processor
Figure 1. Example of an Si5350B in an Audio/Video Application
2.2. Applying a Reference Clock at XTAL Input
The Si5350B can be driven with a clock signal through the XA input pin.
V_IN = 1 V_PP
25/27 MHz
XA
0.1 µF
XB
OSC
PLLA
PLLB
Note: Float the XB input while driving
the XA input with a clock
Multi
Synth
0
Multi
Synth
1
Multi
Synth
N
Figure 2. Si5350B Driven by a Clock Signal
Rev. 1.0
9