si5315 Silicon Laboratories, si5315 Datasheet - Page 46

• Manufacturer Part Number: si5315
• Description: Synchronous Ethernet/telecom Jitter Attenuating Clock Multiplier
• Manufacturer: Silicon Laboratories

Si5315
9. Typical Application Circuit
46
Input Clock
Sources from
Telecom Backplane
Option 1:
Option 2:
Manual/Automatic Clock
Frequency Table Select
Clock Output 2 Disable/
Bypass Mode Control
Signal Format Select
Input Clock Select
Frequency Select
Bandwidth Select
Crystal/Ref Clk
1
Selection (L)
Crystal
Ext. Refclk+
Ext. Refclk–
130 
130 
82 
82 
Reset
V
V
15 k
15 k
15 k
15 k
15 k
15 k
15 k
15 k
DD
DD
= 3.3 V
= 3.3 V
V
V
V
V
DD
DD
DD
DD
V
V
V
V
DD
DD
DD
DD
15 k
15 k
15 k
15 k
15 k
15 k
15 k
15 k
130 
130 
82 
82 
Notes:
0.1 µF
0.1 µF
Figure 22. Si5315 Typical Application Circuit
System
Supply
Power
1. Assumes differential LVPECL termination (3.3 V) on clock inputs.
2. Denotes tri-level input pins with states designated as L (ground), M (V
3. Assumes manual input clock selection.
XA
XB
XA
XB
XTAL/Clock
AUTOSEL
CS
FRQTBL
FRQSEL[3:0]
BWSEL[1:0]
SFOUT[1:0]
DBL2_BY
RST
CKIN1+
CKIN1–
CKIN2+
CKIN2–
3
2
2
2
2
2
2
Ferrite
2
Bead
Preliminary Rev. 0.2
Si5315
C
C
C
C
3
2
1
4
1 µF
0.1 µF
0.1 µF
0.1 µF
CKOUT1+
CKOUT1–
CKOUT2+
CKOUT2–
LOS1
LOS2
LOL
DD
/2), and H (V
0.1 µF
0.1 µF
0.1 µF
0.1 µF
100 
100 
CKIN1 Loss of Signal Indicator
CKIN2 Loss of Signal Indicator
PLL Loss of Lock Indicator
DD
).
+
–
+
–
Clock Outputs to
Ethernet PHYs