FK-49U Series FEATURES l Low Cost l Industry Standard l Wide Frequency Range l Excellent Aging l AT Cut Crystal The FK-49U Series is an industry standard AT cut crystal housed in a FK-49U package.It is our standard resistance weld quartz crystal.
FK-49U Series
l Low Cost
l Industry Standard
l Wide Frequency Range
l Excellent Aging
l AT Cut Crystal
The FK-49U Series is an industry standard AT cut crystal housed in a FK-49U package.It is our standard resistance weld quartz crystal.
Parameter
Symb
Condition
Min
Type
Max
Units
Frequency Range
Fo
1.8432
125
MHz
Frequency Tolerance at 25℃
△F/Fo
25℃
±10
±30
±50
Ppm
Temperature Stability
Tc
REF TO 25℃
±20
Operating Temperature Range
TOPR
-20
+60
℃
Storage Temperature Range
TSTG
-40
+85
Shunt Capacitance
Co
7
PF
Load Capacitance
CL
Customer Specified
10
Series
Insulator Resistance
IR
100VDC
500
MΩ
Drive Level
DL
100
μW
Aging(at 25℃)
FA
AT 25℃,per year
-5.0
+5.0
ppm
Equivalent Series Resistance(ESR) and Mode of Vibration(Mode)
Max ESR(Ω)
1.8432 to 1.999
650
Fundamental/AT
6.000 to 7.999
50
2.000 to 2.999
8.000 to 12.999
35
3.000 to 3.499
250
13.000 to 32.000
25
3.500 to 3.999
150
24.000 to 29.000
60
3rd Overtone
4.000 to 4.999
30.000 to 79.000
40
5.000 to 5.999
80
80.000 to25.000
90
5rd Overtone
Mechanical Dimensions(mm)
