Quartz Crystal Resonators
CERAMIC SEAM SEALED SURFACE MOUNT PACKAGE - XCS21 Series
FEATURES
RoHS Compliant (Pb-Free), Ultra Miniature Design (2x1.6x0.45 mm)
AT-cut Crystal, Tight Frequency Stability over Wide Temperature Range; Excellent Aging
Low and Level ESR; Excellent Drive Level Characteristics
Industry de factor Standard Footprint; Excellent for High Density Surface Mounting
SPECIFICATIONS
Frequency Range
Resonance Mode
Standard Frequency
Calibration Tolerance @25°C
Frequency Stability Ref @25°C
Temperature Range
Crystal Aging
Storage Temperature
Load Capacitance (CL)
Shunt Capacitance
Drive Level
Creating a Part Number
Product Series
Frequency
Resonance Mode: 1 = Fundamental
18 MHz to 60 MHz
1 = Fundamental (18 to 60 MHz)
24, 26, 27, 32, 36, 38.4, 40, 44, 48 MHz
A = ±50 ppm; B = ±30 ppm; C = ±20 ppm; D = ±15 ppm; E = ±10 ppm
10 = ±10 ppm; Tighter stability available
C = -10°C to 60°C; Extended temperature range available
±3 ppm / year Maximum
-40°C to 85°C
CL = 10 pF (Standard), 16 pF, 18 pF, others, or S = Series resonant
7.0 pF Maximum
0.1 mW Maximum
XCS21-26M000-1 E 10 C 10
-options
Load Capacitance: 10, 16, 18, S = Series resonant
Operating Temperature Range: C = -10 to 60°C
Frequency Stability:
Tolerance at 25°C:
A = ±50 ppm
B = ±30 ppm
E = ±10 ppm
5 = ±5 ppm
10 = ±10 ppm
15 = ±15 ppm
D = -20 to 70°C
F = 0 to 50°C
Equivalent Series Resistance
Frequency (MHz)
18.000 - 60.000
Mode
Fund
Max ESR (Ohms)
60 - 300
OUTLINE DRAWING
Recommended Solder Pad Layout
0.85
0.95 0.5 0.95
MARKING
AREA
1.6±0.1
1
4
2
3
0.5 0.5 0.5
2.0±0.01
0.45±0.05
0.59 0.7 0.59
All dimensions are typical unless otherwise specified
Dimensions in Millimeters
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2008-2009 Fortiming Corp. USA
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