Miniature Type Crystal Resonators
AT-49, AT-38
Features
Crystal resonators with superior frequency stability for
standard clock oscillation for microprocessors.
AT-49 type also works well for visual applications.
Series Resistance
Frequency
Type
Vibration Mode
Fund.
Fund.
Fund.
Fund.
Fund.
Fund.
Fund.
Fund.
Fund.
Fund.
3rd
3rd
AT−49
300Ωmax.
150Ωmax.
120Ωmax.
100Ωmax.
80Ωmax.
70Ωmax.
60Ωmax.
50Ωmax.
40Ωmax.
50Ωmax.
100Ωmax.
80Ωmax.
3.072∼3.5MHz
3.5∼3.8MHz
3.8∼4.1MHz
AT-49
4.1∼5.0MHz
5.0∼6.0MHz
6.0∼8.0MHz
8.0∼10.0MHz
10.0∼12.0MHz
12.0∼28.0MHz
28.0∼33.9MHz
26.0∼40.0MHz
40.0∼70.0MHz
AT-38
Series Resistance
Frequency
Type
Vibration Mode
Fund.
Fund.
Fund.
Fund.
Fund.
Fund.
Fund.
Fund.
Fund.
Fund.
3rd
AT-38
200Ωmax.
180Ωmax.
150Ωmax.
120Ωmax.
100Ωmax.
80Ωmax.
70Ωmax.
60Ωmax.
50Ωmax.
40Ωmax.
100Ωmax.
3.57∼3.7MHz
3.7∼4.0MHz
12.7±1.0
φ0.43
−0.02
+0.05
※1.1±0.2
※Per
dimension closest to the body of the unit.
25
10.0±1.0
φ0.30
±0.07
8.8±0.2
Frequency Range
AT-49 3.072∼70.000MHz
AT-38 3.579∼28.000MHz
Vibration Mode
Thickness-shear mode
（AT cut）
Fundamental, 3rd overtone
Drive Level
10μW
（Fund.）
50μW
（3rd）
Load Capacitance
Series, 12pF, 16pF, 20pF, 32pF
（Fund.）
8pF, 10pF, 12pF, 16pF
（3rd）
Frequency Tolerance
（at 25℃）
-6
±30×10 ，
±50×10
-6
，
±100×10
-6
Frequency Tolerance
over Temperature
（Ref. to 25℃）
-6
±30×10 ，
±50×10
-6
，
±100×10
-6
Operating Temperature Range
−10∼＋60℃
Storage Temperature Range
−30∼＋80℃
Max.Drive Level
300μW max.
（Fund.）
1mW max.
（3rd）
4.0∼4.1MHz
4.1∼5.0MHz
5.0∼7.0MHz
7.0∼10.0MHz
10.0∼12.0MHz
12.0∼14.0MHz
14.0∼16.0MHz
16.0∼30.0MHz
26.0∼40.0MHz
Consult our sales representative for other specifications or special specifications.
Dimensions[mm]
11.5 max.
5.0 max.
AT-49
+0.1
φ3.0
−0.2
AT-38
※4.88±0.2
3.5 max.
φ3.0
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