Datenblatt

VT Series(VT-150/VT-200)
Quartz Crystal Units for Watches
FEATURES
• Compact tubular package.
• Photolithographic process.
• Excellent shock resistance and environmental characteristics.
APPLICATIONS
• Real Time Clocks, Timers, Pagers, Cameras, RemoteControllers, Portable Applications
STANDARD SPECIFICATIONS
Item
Conditions without notice (Temperature: +25±2°C)
Symbol
Specifications
Nominal Frequency
fo
32.768kHz
Allowable Frequency Tolerance
f/fo
Conditions / Notes
(±5 x 10-6) ±10 x 10-6, ±20 x 10-6
Turnover Temperature
Tp
+25±5°C
Temperature Coefficient
K
(-3.5±0.8) x 10-8/°C2
Load Capacitance
CL
4.5 to12.5pF
Series Resistance
R1
50kΩ max.
Absolute Maximum Drive Level
DLmax
1µW
Recommended Drive Level
DL
0.1µW
Shunt Capacitance
C0
Frequency Change Over Time
f/fo
±5 x 10-6 max.
Operating Temperature Range
Tope
-10°C to +60°C
Storage Temperature Range
Tsto
-30°C to +70°C
0.86pF typ.
DIMENSIONS
+25±3°C, First Year
FREQUENCY-TEMPERATURE CURVE
VT-150
(x 10 -6)
0
5.0 max.
4.5 min.
-10
-20
(0.45)
ø1.5
ø0.2
Frequency -30
Deviation
-40
UNIT: mm
∆f/f0
Typ.
-50
Tp=25˚C
K=-0.035 x 10-6/˚C 2
-60
-20
VT-200
5.0 min.
(0.6)
ø2.0
UNIT: mm
14
0
10
20
30
Temperature
ø0.2
6.0 max.
-10
40
50
60
70 (˚C)
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