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參數資料
| 型號： | QT392L-10-S-FREQ3 |
| 廠商： | Q-TECH CORP |
| 元件分類： | XO, clock |
| 英文描述： | CRYSTAL OSCILLATOR, CLOCK, 50 MHz - 70 MHz, LVHCMOS OUTPUT |
| 封裝： | ROHS COMPLIANT, HERMETIC SEALED, CERAMIC, SMD, 4 PIN |
| 文件頁數： | 6/7頁 |
| 文件大?。?/td> | 710K |
| 代理商： | QT392L-10-S-FREQ3 |
66
Q-TECH Corporation - 10150 W. Jefferson Boulevard, Culver City 90232 - Tel: 310-836-7900 - Fax: 310-836-2157 - www.q-tech.com
CLASS B+ PRODUCTS
CRYSTAL CLOCK OSCILLATORS
3.3 to 5.0Vdc
-
450kHz to 85MHz
ClassB+Products(Revision-,April2009)
Q-TECH
CORPORATION
Vdd
GND
0.1xVdd
0.9xVdd
VOH
VOL
Tr
Tf
TH
T
0.5xVdd
SYMMETRY =
x 100%
TH
T
OutputWaveform(Typical)
Frequencyvs.TemperatureCurve
TestCircuit
-
Output
Ground
4
3
2
0.1F
15pF
1
Tristate Function
Power
supply
10k
mA
Vdc
+
(*)
or
0.01F
QT78
(*) CL includes probe and jig capacitance
Typical test circuit for CMOS logic
-5
-4
-3
-2
-1
0
1
2
3
4
5
-50
-40
-30
-20
-10
0
10
20
30
40
50
-55
-45
-35
-25
-15
-5
5
15
25
35
45
55
65
75
85
95
105
115
125
Frequency
Stability
(PPM)
Temperature (°C)
Frequency-Temperature Curve QTX88LD9M-48.21MHz
45
Hybrid Case
Substrate
Die
D/A epoxy
Heat
Die
R1
D/A epoxy
Substrate
D/A epoxy
Hybrid Case
R2
R3
R4
R5
ThermalCharacteristics
JA
JC
CA
Die
T
C
A
J
CA
JC
(Figure1)
(Figure2)
TheTristatefunctiononpin1hasabuilt-inpull-upresistortypical50k,soit
canbeleftfloatingortiedtoVddwithoutdeterioratingtheelectricalperformance.
Theheattransfermodelinahybridpackageisdescribedin
figure1.
Heatspreadingoccurswhenheatflowsintoamateriallayerof
increasedcross-sectionalarea. Itisadequatetoassumethat
spreadingoccursata45°angle.
Thetotalthermalresistanceiscalculatedbysummingthe
thermalresistancesofeachmaterialinthethermalpath
betweenthedeviceandhybridcase.
RT=R1+R2+R3+R4+R5
ThetotalthermalresistanceRT(seefigure2)betweentheheat
source(die)tothehybridcaseistheThetaJunctiontoCase
(ThetaJC)in°C/W.
Thetajunctiontocase(ThetaJC)forthisproductis30°C/W.
Thetacasetoambient(ThetaCA)forthispartis100°C/W.
ThetaJunctiontoambient(ThetaJA)is130°C/W.
MaximumpowerdissipationPDforthispackageat25°Cis:
PD(max)=(TJ(max)–TA)/ThetaJA
WithTJ=175°C(Maximumjunctiontemperatureofdie)
PD(max)=(175–25)/130=1.15W
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