參數(shù)資料
型號(hào): SL38000ZCT
廠商: Silicon Laboratories Inc
文件頁(yè)數(shù): 2/12頁(yè)
文件大?。?/td> 0K
描述: IC CLOCK SSCG 4PLL 9CH 28TSSOP
標(biāo)準(zhǔn)包裝: 2,000
系列: EProClock®
類(lèi)型: *
PLL: 帶旁路
輸入: 時(shí)鐘,晶體
輸出: 時(shí)鐘
電路數(shù): 1
比率 - 輸入:輸出: 1:11
差分 - 輸入:輸出: 無(wú)/無(wú)
頻率 - 最大: 200MHz
除法器/乘法器: 是/無(wú)
電源電壓: 2.97 V ~ 3.63 V
工作溫度: 0°C ~ 70°C
安裝類(lèi)型: *
封裝/外殼: *
供應(yīng)商設(shè)備封裝: *
包裝: *
Rev 1.1, August 7, 2008
Page 10 of 12
SL38000
PCin(pF) =PCout(pF)= [(CL(pF) – Cp(pF)/2)] x 2
Where CL is crystal load capacitor as given by the crystal datasheet and Cp(pF) is the compensation factor for the
total parasitic capacitance at XIN or XOUT pin including PCB related parasitic capacitance.
As an example; if a crystal with CL=18pF is used and Cp=4pF, by using the above formula, PCin=PCout=[(18-(4/2)] x
2 = 32pF. Programming PCin and PCout to 32pF assures that this crystal sees an equivalent load of 18pF and no
other external crystal load capacitor is needed. Deviating from the crystal load specification could cause an increase
in frequency accuracy in ppm. Refer to the Table 5 for the recommended crystal specifications.
Recommended External Crystal Specifications (XO Version)
Parameter
Description
Min
Typ
Max
Unit
Comments
FNOM
Nominal Crystal
Frequency Range
8
-
48
MHz
Fundamental Mode – AT Cut
CL
Nominal Crystal Load
6
12
18
pF
Load for +/-0 ppm Fo resonance
value
R1,1
Equivalent Series
Resistance
20
40
100
Ohm
F-Range: 8.0 to 12.999 MHz
R1,2
Equivalent Series
Resistance
12.5
25
60
Ohm
F-Range: 13.0 to 19.999 MHz
R1,3
Equivalent Series
Resistance
10
20
50
Ohm
F-Range: 20.0 to 48.000 MHz
DL1,1
Crystal Drive Level
-
200
W
F-Range: 8.0 to 19.999 MHz
DL1,2
Crystal Drive Level
-
150
W
F-Range: 20.0 to 48.000 MHz
Co1
Shunt Capacitance
-
4
5.4
pF
SMD Xtals
Co2
Shunt Capacitance
-
5
7.2
pF
Through Hole (Leaded) Xtals
Table 3. Recommended Crystal Specifications
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