CRYSTAL
UNITS
CRYSTAL UNITS FOR MICROPROCESSOR (NR-18)
s
Features
8
NR-18 crystal units can provide a great number of standard frequencies and have a wide range of
applications. In addition, taping type and gull-wing type are available for automatic mounting.
s
Specification
Frequency Range
Overtone
Temperature Characteristics
Operating Temp. Range
Frequency Tolerance
Equivalent Series Resistance
Table 5 (NR-18)
Table 5 (NR-18)
±50
×
10
-6
–10 ~ +60°C
±50
×
10
-6
(at 25°C)
Table 5 (NR-18)
Measuring Circuit: CI Meter
•
Dimensions
Fundamental
Drive Level
Standard Load
Capacitance
50µW (1000µW max)
16pF
3rd Overtone
500µW (1000µW max)
Series
13.46max
10.10 max
3.70 max
(mm)
Standard load capacitance may vary depending on the
frequency.
20±1
4.88±0.20
11.05 max
+0.05
–0.03
ø 0.43
4.65 max
NR-18
s
Technical Guidance (NR-18)
•
Equivalent Series Resistance (R
1
)
(max)
200
•
Shunt Capacitance (C
0
)
(Typical)
10
8
180
CO (pF)
6
4
2
Fundamental
160
140
3rd Overtone
1
10
100
0
120
FREQ (MHz)
R1 (Ω)
100
•
Motional Capacitance (C
1
)
(Typical)
100
80
60
Fundamental
3rd overtone
C1 (fF)
40
10
Fundamental
20
3rd Overtone
1
1
10
100
0
1
10
FREQ (MHz)
100
FREQ (MHz)
56
CRYSTAL
UNITS
s
Table 5
Standard Frequencies and Specifications (NR-18)
<Fundamental>
<3rd overtone>
<Equivalent Series Resistance (Ω)>
Standard Frequency
(MHz)
3.000
3.072
3.120
3.146024
3.1884
3.200
3.2764
3.2768
3.330
3.4944
3.500
3.515
3.541
3.546894
3.557837
3.575611
3.579545
3.582056
3.600
3.601
3.6864
3.79545
3.840
3.900952
3.932160
3.975
3.9936
4.000
4.032
4.096
4.14
4.194304
4.296503
4.332
4.433619
4.500
4.608
4.78272
4.800
4.9152
5.000
5.0688
5.120
5.185
5.5296
5.700
5.7143
5.760
6.000
6.144
6.176
6.250
6.400
6.5536
7.000
7.15909
7.162109
7.200
7.300
7.3728
7.500
7.600
8.000
8.192
8.388
30.000
8.388608
8.4672
8.6436
8.775
8.867238
9.000
9.216
9.600
9.800
10.000
10.200~10.500
10.600
10.700~11.000
11.0592
11.880
11.9808
11.98135
12.000
12.2
Standard Frequency
(MHz)
22.000
*2
Overtone
Standard Frequency
(MHz)
3.0~3.2
3.2~3.5
3.5~4.6
4.6~4.9
4.9~5.1
Equivalent Series
Resistance (Ω)
200max
150max
100max
80max
70max
50max
45max
40max
35max
30max
25max
40max
80max
60.000
61.250
62.305
67.7376
70.000
71.700
75.875
Fundamental
5.1~5.7
5.7~6.0
6.0~8.0
8.0~9.0
9.0~10.0
10.0~30.0
<5th overtone>
Standard Frequency
(MHz)
60.4256
62.3067
65.050
70.000
73.9944
75.000
76.2875
78.4667
79.865
80.550
81.050
81.745
82.285
82.655
84.000
84.672
85.700
86.400
89.750
91.555
94.556
95.325
98.325
98.550
100.000
104.550
105.7342
115.000
118.700
122.912
122.880
130.000
132.000
3rd overtone
5th overtone
22.0~76.0
60.0~132.0
*1
*1 All frequencies from 12.2 to 30.0 MHz can be manufactured.
*2 All frequencies from 22 to 60 MHz (3rd Overtone) can be manufactured.
58
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