SM20S Datasheet, PDF (1/1 Pages) Pletronics, Inc. – 4 Lead Surface Mount Tuning Fork Watch Crystals

Pl tronics, Inc.
. _{19013 36th Ave. W, Lynnwood, WA 98036 USA}
Manufacturer of High Quality Frequency Control Products
SM Watch Crystals
4 Lead Surface Mount Tuning Fork Watch Crystals
SM13S: 1.5x7x1.4mm, SM20S: 3.8x8.5x2.5mm
Standard Specifications
SM20S
SM13S
32.768 kHz
Part Numbering Guide
Calibration Frequency Tolerance ± 20 PPM at 25°C std,
SM20S - 32.768K - 6pF - XXX (Internal Code or blank)
SM20SD = ± 10 PPM
Model
Load Capacitance
Operating Temperature Range (OTR) -40 to +85° C
Blank = 12.5pF
Frequency Stability over OTR
Frequency in kHz
Calculate as: Frequency shift from 25°C to T°C in PPM
= - 0.038 x (T - 25) ² ± 10%
or
Load Capacitance
12.5 pF std, 6 pF avail. for SM20S only
SM13S - 32.768K
Equivalent Series Resistance
(ESR)
Drive Level
Aging at 25^° C for the 1st year
Shunt Capacitance
SM20S: 50 k ohm max,
SM13S: 65 k ohm max
1μW maximum
± 5 PPM maximum
1.0 pF to 1.45 pF typical
Consult factory for available specifications.
A special part number may be assigned.
Mechanical: inches (mm)
not to scale
Solder Pads
Due to part size and factory abilities, part marking may vary from lot to lot and may contain our part number or an internal code.
.276 (7.0) MAX
SM13S
1
.055 (1.4)
MAX
3
2
Packaging
16mm tape
8mm pitch
.200 (5.08)
4
4
N.C. 3 _{.012 (0.3)}
1
N.C. ₂ .024 (0.6)
1
.047 (1.2)
.335 (8.5) MAX
4
3
SM20S
1
2
.217 (5.5)
.098 (2.5)
MAX
.165 (4.2)
4
GND 3
.051 (1.3)
1
GND ^{2 .075 (1.9)}
.051 (1.3)
Apr 2008
Pl tronics, Inc. (425) 776 -1880, Fax: [phone], [e-mail], www.pletronics.com
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