SI5347_16 Datasheet, PDF (34/55 Pages) Silicon Laboratories – Dual/Quad DSPLL Any-Frequency, Any-Output Jitter Attenuators

Si5347/46 Rev D Data Sheet
Electrical Specifications
Table 5.12. Crystal Specifications¹
Parameter
Symbol
Test Condition
Min
Typ
Max
Unit
Crystal Frequency Range
f_XTAL
Full operating range. Jit-
24.97
—
54.06
MHz
ter performance may be
reduced.
Range for best jitter.
48
—
54
MHz
Load Capacitance
C_L
—
8
—
pF
Crystal Drive Level
d_L
—
—
200
µW
Equivalent Series Resistance
Shunt Capacitance
r_ESR
C_O
Refer to the Family Reference Manual to determine ESR and shunt capacitance.
Notes:
1. Refer to the Si5347/46 Reference Manual for recommended 48 to 54 MHz crystals. The Si5347 and Si5346 are designed to work
with crystals that meet these specifications.
Table 5.13. Thermal Characteristics
Parameter
Symbol
Test Condition¹
Value
Unit
Si5347–64QFN
Thermal Resistance
Junction to Ambient
θ_JA
Still Air
22
°C/W
Air Flow 1 m/s
19.4
Air Flow 2 m/s
18.3
Thermal Resistance
θ_JC
9.5
Junction to Case
Thermal Resistance
θ_JB
9.4
Junction to Board
ψ_JB
9.3
Thermal Resistance
ψ_JT
0.2
Junction to Top Center
Si5346–44QFN
Thermal Resistance
Junction to Ambient
θ_JA
Still Air
22.3
°C/W
Air Flow 1 m/s
19.4
Air Flow 2 m/s
18.4
Thermal Resistance
θ_JC
10.9
Junction to Case
Thermal Resistance
θ_JB
9.3
Junction to Board
ψ_JB
9.2
Thermal Resistance
ψ_JT
0.23
Junction to Top Center
Note:
1. Based on PCB Dimension: 3” x 4.5”, PCB Thickness: 1.6 mm, PCB Land/Via under GNP pad: 36, Number of Cu Layers: 4
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