AT-51 Datasheet, PDF (1/1 Pages) NIHON DEMPA KOGYO – Crystal Units For OA / AV

Crystal Units
AT-51 / AT-51CD2
For OA / AV
n Features
A highly stable and reliable crystal unit with a metallic package, also suitable
for surface mounting.
lWith many standard frequencies available, this unit is ideal for a variety of
applications.
lCompatible with surface mounting.
lAirtight metal package ensures high-reliability.
lAT-51CD2 meets the requirements for re-flow profiling using lead-free
solder.
AT-51
n Specifications
AT-51CD2
Pb
Free
Item
Model
Frequency Range
Overtone Order
Frequency Tolerance (25 ±3℃)
Temperature Characteristics (with reference to +25°C)
Operating Temperature Range
Equivalent Series Resistance
Drive Level
Load Capacitance
AT-51 / AT-51CD2
3.1875 to 28.63636MHz
26 to 75MHz
Fundamental
3rd overtone
±20 × 10^−6
±30 × 10^−6
−10 to +70℃
Refer to *1 and *2
Refer to *3 (Max:1000μW)
16pF
Series resonance
n How to Specify an Order
When ordering our products, specify them with an “Ordering Code” that consists of the following :
Model name - Frequency (Max : 9 digits) M - Number for specifying an order
Example AT-51-4.000-STD-PFV-2
If you have any queries concerning our standard frequencies and numbers for specifying orders, please contact our sales representatives or visit our homepage
(http://www.ndk.com/).
n Dimensions
AT-51
10.1max
mm
AT-51CD2
10.1max
connections
mm
4.88±0.20
11.05max
φ0.43^+0.05
-0.03
4.65max
*1 Equivalent Series Resistance (Fundamental)
Overtone
Order
Frequency (MHz)
(Range)
Equivalent Series
Resistance max.[Ω]
3.1875 to 3.2
400
3.2 to 3.5
200
3.5 to 3.8
140
3.8 to 4.2
120
4.2 to 4.883
100
Fundamental
4.883 to 5.2
5.2 to 5.7
80
70
5.7 to 6.6
60
6.6 to 6.8
55
6.8 to 8.3
50
8.3 to 10.7
45
10.7 to 12.2
40
12.2 to 15
35
15 to 28.63636
30
12.4 ±0.3
11.4 ±0.2
Reference land pattern
6.0
4.88±0.2
9.0
*2 Equivalent Series Resistance (3rd overtone)
Overtone
Order
3rd overtone
Frequency (MHz)
(Range)
26 to 35
35 to 48
48 to 75
Equivalent Series
Resistance max.[Ω]
140
100
80
*3 Drive Level
Overtone
Order
Fundamental
3rd overtone
Frequency (MHz)
(Range)
3.1875 to 3.541
3.541 to 28.63636
26 to 60
60 to 75
Drive Level(μW)
500
50
500
10
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