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 39