T38, T26, T15 32.768 KHz Tuning Fork Watch Crystals

T38, T26, T15
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•
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MERCURY
32.768 KHz Tuning Fork Watch Crystals
Since 1973
Micro tubular holder (cylindrical type) X-cut tuning fork crystals.
Ideal for 1Hz timing frequency.
Compact and high-shock.
SPECIFICATIONS
Frequency:
32.768 kHz
Crystal Holder Prefix:
MEC Part Number:
Holder Sizes:
T15
T26
T38
T15-32.768K-8P
T26-32.768K-12.5P
T38-32.768K-12.5P
Ø
1.5 mm x 5.0mm
Frequency Tolerance at 25°C:
Maximum Series Resistance:
Ø
2.0 mm x 6.0mm
Ø
3.0 mm x 8.0mm
±15 ppm; ±20 ppm (standard), ±30 ppm
40 kΩ max.
35 kΩ max.
35 kΩ max.
Quality Factor (Q):
40,000 minimum
50,000 minimum
50,000 minimum
Motional Capacitance (C1):
0.0025 pf typical
0.0030 pf typical
0.0035 pf typical
1.00 pf typical
1.35 pf typical
1.60 pf typical
Capacitance Ratio (Co/C1):
400 typical
450 typical
460 typical
Load Capacitance (CL):
8pF typical
6 pF or 12.5 pF
6 pF or 12.5pF
Shunt Capacitance (Co):
Vibration Type:
X-cut
Turnover Temperature (TT):
25°C ±5°C
Drive Level:
1 μW max.
2
Parabolic Curvature Constant:
-0.035ppm / °C typical
Operating Temperature Range:
-10°C to +60°C
Storage Temperature Range:
-30°C to +70°C
Shock:
3 ppm maximum 3 drops from a height of 75 cm onto hardwood
Vibration:
Aging:
MERCURY
3 ppm maximum
First year: 3 ppm maximum at 25°C
www.mercury-crystal.com
Taiwan: TEL (886)-2-2406-2779, FAX (886)-2-2496-0769, e-mail: [email protected]
U.S.A.: TEL (1)-909-466-0427, FAX (1)-909-466-0762, e-mail: [email protected]
Mercury
Page 1 of 2
Date; Oct. 27, 2003
Rev. 0
T38, T26, T15
32.768 KHz Tuning Fork Watch Crystals
PACKAGE DIMENSIONS
MERCURY
Since 1973
Unit: mm [inches]
FREQUENCY-TEMPERATURE AND LOAD CAPACITANCE CHARACTERISTICS
HOW TO ORDER
Holder type
˙
32.768K
˙
T15, T26 or T38
Load Capacitance
˙ Frequency Tolerance
8 pF, 6 pF or 12.5 pF
±15, ±20 or ±30 ppm
Example: T26-32.768K-6P-20 represents 2x6 mm 32.768 KHz with 6 pF load capacitance and ±20
ppm frequency tolerance.
Mercury
Page 2 of 2
Date; Oct. 27, 2003
Rev. 0