SI5350A-B Datasheet, PDF (8/29 Pages) Silicon Laboratories – FACTORY-PROGRAMMABLE ANY-FREQUENCY CMOS CLOCK GENERATOR

Si5350A-B
2. Typical Application
2.1. Si5350A Replaces Multiple Clocks and XOs
The Si5350A is a user-definable custom clock generator that is ideally suited for replacing crystals and crystal
oscillators in cost-sensitive applications. An example application is shown in Figure 1.
CPU
33.3333 MHz
74.25 MHz or ^74.25 MHz
1.001
27 MHz
Video
Processor
27 MHz
XA
CLK3
Si5350A _CLK4
XB
24.576 MHz
22.5792 MHz
Audio
Processor
USB
Controller
48 MHz
Ethernet
PHY
125 MHz
28.322 MHz
HDMI
Port
Figure 1. Example of an Si5350A in an Audio/Video Application
2.2. Applying a Reference Clock at XTAL Input
The Si5350A 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. Si5350A Driven by a Clock Signal
8
Rev. 1.0