PLETRONICS SM20S

Pl tronics,
Inc.
.
19013 36th Ave. W, Lynnwood, WA 98036 USA
Manufacturer of High Quality Frequency Control Products
SM Watch Crystals
SM20S
SM13S
4 Lead Surface Mount Tuning Fork Watch Crystals
SM13S: 1.5x7x1.4mm, SM20S: 3.8x8.5x2.5mm
32.768 kHz
Standard Specifications
Calibration Frequency Tolerance
Part Numbering Guide
± 20 PPM at 25°C std,
SM20SD = ± 10 PPM
SM20S - 32.768K - 6pF - XXX (Internal Code or blank)
Model
Operating Temperature Range (OTR) -40 to +85° C
Frequency Stability over OTR
Calculate as: Frequency shift from 25°C to T°C in PPM
= - 0.038 x (T - 25) 2 ± 10%
Frequency in kHz
or
Load Capacitance
12.5 pF std, 6 pF avail. for SM20S only
Equivalent Series Resistance
(ESR)
SM20S: 50 k ohm max,
SM13S: 65 k ohm max
Drive Level
Aging at 25° C for the 1st year
Shunt Capacitance
1μ W maximum
± 5 PPM maximum
1.0 pF to 1.45 pF typical
Mechanical: inches (mm)
Load Capacitance
Blank = 12.5pF
SM13S - 32.768K
Consult factory for available specifications.
A special part number may be assigned.
Solder Pads
not to scale
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.
.059 (1.5) MAX
Packaging
16mm tape
8mm pitch
.055 (1.4)
MAX
.276 (7.0) MAX
.200 (5.08)
3
4
SM13S
1
2
4
N.C. 3
1
N.C. 2
1
.012 (0.3)
.024 (0.6)
.047 (1.2)
.098 (2.5)
MAX
.150 (3.8) MAX
.335 (8.5) MAX
4
3
.165 (4.2)
4
GND
3
.051 (1.3)
SM20S
1
2
1
GND 2
.075 (1.9)
.217 (5.5)
.051 (1.3)
Apr 2008
Pl tronics, Inc. (425) 776 -1880, Fax: (425) 776-2760, [email protected], www.pletronics.com
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