SI5327 Datasheet, PDF (18/60 Pages) Silicon Laboratories – ANY-FREQUENCY PRECISION CLOCK MULTIPLIER/JITTER ATTENUATOR

Si5327
3. Typical Application Circuit
Input
Clock
Sources*
VDD = 3.3 V
System
Power
Supply
Ferrite
Bead
130 
82 
130 
82 
CKIN1+
CKIN1–
VDD = 3.3 V
130 
130 
CKIN2+
C4 1 µF
C1 0.1 µF
C2 0.1 µF
C3 0.1 µF
CKOUT1+
CKOUT1–
CKOUT2+
CKOUT2–
0.1 µF
+
100 
–
0.1 µF
0.1 µF
+
100 
–
0.1 µF
Clock Outputs
82 
82 
CKIN2–
Option 1:
Crystal
Crystal/Ref Clk Rate
Option 2:
Refclk+
Refclk–
Control Mode (L)
XA
VDD
15 k
15 k
XB
RATE²
0.1 µF
XA
0.1 µF
XB
CMODE
Si5327
INT_LOS1
LOS2
LOL
A[2:0]
SDA
SCL
CKSEL
Interrupt/CKIN1 LOS Indicator
CKIN2 LOS Indicator
PLL Loss of Lock Indicator
Serial Port Address
Serial Data
Serial Clock
I2C Interface
Clock Select
Reset
RST
Notes: 1. Assumes differential LVPECL termination (3.3 V) on clock inputs.
2. Denotes tri-level input pins with states designated as L (ground), M (VDD/2), and H (VDD).
3. I²C-required pull-up resistors not shown.
Figure 5. Si5327 Typical Application Circuit (I²C Control Mode)
Note: For an example schematic and layout, refer to the Si5327-EVB User’s Guide.
Input
Clock
Sources*
VDD = 3.3 V
System
Power
Supply
130 
130 
Ferrite
Bead
82 
82 
CKIN1+
CKIN1–
VDD = 3.3 V
130 
130 
C4 1 µF
C1 0.1 µF
C2 0.1 µF
C3 0.1 µF
CKOUT1+
CKOUT1–
CKOUT2+
CKOUT2–
0.1 µF
+
100 
–
0.1 µF
0.1 µF
+
100 
–
0.1 µF
Clock Outputs
CKIN2+
82 
82 
CKIN2–
INT_LOS1
Si5327
LOS2
Interrupt/CLKIN1 LOS Indicator
CLKIN2 LOS Indicator
Option 1:
Crystal
Crystal/Ref Clk Rate
Option 2:
Refclk+
Refclk–
Control Mode (H)
Reset
XA
LOL
PLL Loss of Lock Indicator
VDD
15 k
15 k
XB
RATE²
SS
SDO
Slave Select
Serial Data Out
0.1 µF
XA
0.1 µF
XB
SDI
SCLK
Serial Data In
Serial Clock
CMODE
RST
CKSEL
Clock Select
Notes: 1. Assumes differential LVPECL termination (3.3 V) on clock inputs.
2. Denotes tri-level input pins with states designated as L (ground), M (VDD/2), and H (VDD).
SPI Interface
Figure 6. Si5327 Typical Application Circuit (SPI Control Mode)
Note: For an example schematic and layout, refer to the Si5327-EVB User’s Guide.
18
Rev. 1.0