CRYSTAL UNITS FOR MICROPROCESSOR (AT-51)
s
Features
8
AT-51 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
Load Capacitance
Table 6 (AT-51)
Table 6 (AT-51)
±50
×
10
-6
–10 ~ +60°C
±50
×
10
-6
(at 25°C)
Table 6 (AT-51)
Table 6 (AT-51)
Measuring Circuit: CI Meter
•
Dimensions
3.541 MHz min
(Fundamental)
Drive Level
50µW (1000µW max)
Fundamental
Standard Load
Capacitance
16pF
5.08
max
CRYSTAL UNITS
3.541 MHz max
(Fundamental),
3rd Overtone
500µW (1000µW max)
3rd Overtone
Series
10.10 max
3.70 max
(mm)
20±1
+0.05
ø 0.43 –0.03
Standard load capacitance may vary depending on the
frequency.
4.88±0.20
11.05 max
4.65 max
AT-51
s
Technical Guidance (AT-51)
•
Equivalent Series Resistance (R
1
)
(max)
150
•
Shunt Capacitance (C
0
)
(Typical)
10
8
CO (pF)
6
4
2
Fundamental
0
3rd Overtone
100
100
1
10
FREQ (MHz)
R
1
(Ω)
3rd Overtone
•
Motional Capacitance (C
1
)
(Typical)
100.0
50
Fundamental
10.0
C1 (fF)
Fundamental
1.0
1
5
10
20
50
100
0.1
1
10
FREQ (MHz)
3rd Overtone
100
FREQ (MHz)
57
s
Table 6
Standard Frequencies and Specifications (AT-51)
<Fundamental>
Standard Frequency (MHz)
3.1875
3.2000
3.250
3.2768
3.3939
3.541
3.5712
3.575611
3.579545
3.581
3.582056
3.583125
3.600
3.6385
3.640
3.648
3.666
3.6864
3.700
3.72827
3.7343
3.794
3.802
3.840
3.862625
3.8912
3.928231
3.93216
3.9672
3.976
3.992
3.9935
3.996
4.000
4.0015
4.00896
4.011
4.021
4.02797
4.032
4.045
4.048
4.055
4.096
4.1334
4.138
4.1472
4.192
4.194304
4.200
4.202
4.210
4.286
4.2944
4.2986
4.3008
4.332
4.380
4.400
4.40625
4.4112
4.430
4.433619
4.4361875
4.500
4.5511
4.5568
4.58496
4.608
4.619
4.6957
4.700
4.704
4.750
4.767
4.7727
4.790594
4.800
4.807284
4.883
4.900
4.90625
4.907029
4.9152
4.917
4.9378
4.955
4.981
5.000
5.011
5.013504
5.0688
5.0706
5.089
5.103
5.1056
5.120
5.2553
5.333333
5.390623
5.439488
5.5296
5.6196
5.6448
5.699525
5.72727
5.7285
5.760
5.824
5.850
5.85938
5.910
5.94755
5.955
5.9904
5.993
6.000
6.017
6.144
6.176
6.2308
6.236
6.291
6.29365
6.300
6.3488
6.400
6.4512
6.47168
6.500
6.510
6.5268
6.545
6.550
6.552
6.5536
6.570
6.573882
6.575
6.5863
6.6667
6.68767
6.75663
6.76438
6.77219
6.810
6.815744
6.8985
6.9666
6.9707
6.9732
6.9988
7.0013
7.15909
7.175
7.200
7.250
7.352
7.3728
7.3764
7.38641
7.67386
7.680
7.86432
7.984
7.9872
7.994
8.000
8.0048
8.008
8.009
8.015
8.0256
8.042
8.050
8.062
8.064
8.065
8.188
8.192
8.200
8.215
8.250
8.2944
8.318091
8.319315
8.3809
8.388
8.388608
8.3935
8.400
8.410
8.448
8.4672
8.486
8.545
8.550
8.6436
8.664
8.867238
8.80435
9.000
9.015
9.0744
9.0905
9.110192
9.14076
9.216
9.233016
9.30213
9.3389
9.342812
9.371603
9.392
9.408
9.437184
9.475
9.495
9.53125
9.50938
9.5808
9.600
9.658
9.8122
9.820
9.82656
9.8304
9.84375
9.84498
9.85781
9.915597
9.924
9.92674
9.951
9.97699
9.982
9.984
9.998
10.000
10.002
10.005
10.008
10.010
10.012
10.0187
10.050
10.157
10.17813
10.200
10.215
10.220
10.240
10.245
10.250
10.255
10.258888
10.260
10.320
10.350
10.368
10.43847
10.500
10.620
10.6935
10.695
10.700
10.73863
10.752
10.7803
11.000
11.0592
11.112
11.150
11.1552
11.160
11.250
11.268
11.2896
11.400
11.500
11.520
11.534336
11.54127
11.580224
11.6736
11.71876
11.7375
11.80128
11.880
11.890
11.8951
11.9318
11.94375
11.9808
11.98135
12.000
12.0072
12.057
12.1528
12.15871
12.160
12.288
12.352
12.3678
12.480
12.500
12.544
12.58291
12.586875
12.5884
12.740625
12.754843
12.800
12.8832
12.9024
13.000
13.050
13.150
13.2256
13.300
13.336
13.400
13.40155
13.500
13.5168
13.560
13.574
13.600
13.631488
13.750
13.760
13.80030
13.824
13.86092
13.875
14.180
14.1875
14.21875
14.2375
14.280
14.2848
14.30244
14.31818
14.320
14.328224
14.3728
14.400
14.484
14.500
14.572268
14.576198
14.592
14.6102
14.700
14.721
14.725
14.744
14.7456
14.770
14.800
14.815
14.850
14.865
14.910504
14.9946
15.000
15.0528
15.1983
15.300
15.360
15.500
15.520
15.5367
15.5433
15.5567
15.570
15.5767
15.590
15.600
15.610
15.6233
15.625
15.6433
15.6567
15.6672
15.800
15.900
15.970
15.9744
15.990784
15.994
15.996
16.000
16.0096
16.010
16.020
16.104
16.11182
16.128
16.200
16.257
16.273
16.281
16.3006
16.325376
16.345
16.380
16.384
16.385
16.416
16.5567
16.5888
16.590
16.600
16.610
16.615
16.620
16.625
16.630
16.640
16.6433
16.64728
16.6567
16.6633
16.666
16.670
16.77721
16.800
16.820
16.900
16.9344
16.99301
17.100
17.2032
17.2872
17.30778
17.445
17.57814
17.625
17.6632
17.700
17.734475
17.776
17.800
17.842656
17.860
17.900
17.920
18.000
18.080
18.084
18.140
18.200
18.2202
18.229153
18.285714
18.2912
18.355
18.432
18.4408
18.560
18.62514
18.69217
18.752
18.816
18.868
18.9375
19.005408
19.045
19.069928
19.0856
19.0909
19.13856
19.180
19.200
19.25
19.3125
19.350
19.401256
19.434904
19.440
19.456
19.500
19.600
19.6608
19.670
19.71495
19.800
19.8437
19.8975
19.90656
19.9465
19.968
19.975
19.9825
19.9937
19.995
20.000
20.0013
20.005
20.0125
20.013
20.025
20.134875
20.13985
20.200
20.250
20.284
20.400
20.4066
20.460
20.480
20.517813
20.61612
20.736
20.791387
20.945
20.950
21.000
21.0526
21.120
21.173
21.245
21.400
21.4631
21.47727
21.524476
21.5606
21.600
21.811
22.000
22.1184
22.500
22.550
22.5792
22.7692
22.800
22.846
22.902
22.909088
22.90988
22.953
23.040
23.067
23.178
23.19314
23.328
23.684
23.940
24.000
24.192
24.300
24.450
24.540
24.576
24.586
25.000
25.172
25.175
25.42656
26.800
26.900
27.000
27.500
27.600
27.750
27.97185
28.224
28.375
28.4961
28.4971
28.500
28.63636
CRYSTAL UNITS
59
CRYSTAL
UNITS
<3rd overtone>
Standard Frequency (MHz)
26.000
26.412
26.5625
26.600
26.66488
26.718
26.800
27.000
27.040
27.145
27.300
27.320
27.648
27.778
27.780
28.30150
28.319
28.63636
28.800
29.000
29.044
29.1429
29.200
29.40416
29.4912
29.498928
29.650
29.974
30.000
30.720
30.875
30.900
31.000
31.330
31.334
31.500
31.700
31.9488
31.950
32.000
32.164
32.215905
32.256
32.514
32.576
32.579
32.768
32.800
33.000
33.030
33.300
33.330
33.333
33.340
33.8688
34.000
34.200
34.368
34.540
34.5744
34.992
35.000
35.190
35.2512
35.328
35.557
36.000
36.750
36.860
36.864
37.632
38.000
38.880
38.900
38.912
39.000
39.168
39.3216
39.590
39.750
39.800
39.820
39.950
39.960
39.965
40.000
40.230
40.235
40.320
40.5
40.570
40.609
40.960
41.472
41.539
42.000
42.336
42.9145
42.9545
43.550
44.2368
44.400
44.440
44.4444
44.545
44.900
45.000
45.1584
45.600
45.900
46.200
46.4333
47.9232
48.000
48.384
48.540
48.640
49.152
49.34268
49.381
49.500
49.535
49.800
49.830
50.000
50.350
50.691667
51.200
52.000
52.416
53.693175
53.750
54.000
54.050
54.165
54.200
54.315
55.000
56.000
56.125
56.448
57.000
58.250
60.000
61.500
61.560
62.000
62.500
64.000
65.000
65.536
66.000
66.660
66.6667
70.000
75.000
<Equivalent Series Resistance (Ω)>
Overtone
Standard Frequency
(MHz)
3.1875~3.2
3.2~3.5
3.5~4.0
4.0~4.5
4.5~5.0
Equivalent Series
Resistance (Ω)
400max
250max
150max
120max
100max
80max
70max
60max
50max
40max
140max
100max
80max
Fundamental
5.0~6.0
6.0~8.0
8.0~10.0
10.0~12.0
12.0~
26.0~35.0
3rd overtone
35.0~48.0
48.0~
60
