SI5348 Datasheet, PDF (37/54 Pages) Silicon Laboratories – Network Synchronizer for SyncE/ 1588 PTP Telecom Boundary (T-BC) and Slave (T-SC) Clocks

Si5348 Rev D Data Sheet
Electrical Specifications
Table 5.12. Crystal Specifications¹
Parameter
Symbol
Test Condition
Min
Typ
Max
Unit
Crystal Frequency Range
f_XTAL
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.
Note:
1. Refer to the Si5348 Reference Manual for recommended 48 to 54 MHz crystals. The Si5348 is designed to only work with crys-
tals that meet these specifications and not with XOs.
Table 5.13. Thermal Characteristics
Parameter
Symbol
Test Condition¹
Value
Si5348-64QFN
Thermal Resistance
Junction to Ambient
Ï´_JA
Still Air
22
Air Flow 1 m/s
19.4
Air Flow 2 m/s
18.3
Thermal Resistance
Ï´_JC
9.5
Junction to Case
Thermal Resistance
Ï´_JB
9.4
Junction to Board
Ψ_JB
9.3
Thermal Resistance
Ψ_JT
0.2
Junction to Top Center
Note:
1. Based on PCB Dimension: 3" x 4.5", PCB Thickness: 1.6 mm, PCB Land/Via: 36, Number of Cu Layers: 4.
Unit
°C/W
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