NDK AT-51CD2 Crystal units for oa / av Datasheet

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
AT-51CD2
Pb
Free
n Specifications
Model
Item
Frequency Range
AT-51 / AT-51CD2
3.1875 to 28.63636MHz
Overtone Order
26 to 75MHz
Fundamental
3rd overtone
Frequency Tolerance (25 ±3℃)
±20 × 10−6
Temperature Characteristics (with reference to +25°C)
±30 × 10−6
Operating Temperature Range
−10 to +70℃
Equivalent Series Resistance
Refer to *1 and *2
Drive Level
Refer to *3 (Max:1000μW)
Load Capacitance
16pF
Series resonance
n How to Specify an Order
When ordering our products, specify them with an “Ordering Code” that consists of the following :
Example AT-51-4.000-STD-PFV-2
Model name - Frequency (Max : 9 digits) M - Number for specifying an order
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
3.7max
0.65±0.1
5.5±0.3
5.08
3.5 to 20±1 max
10.1max
AT-51CD2
mm
φ0.43+0.05
-0.03
4.65max
11.4 ±0.2
4.88±0.2
*1 Equivalent Series Resistance (Fundamental)
Overtone
Order
Fundamental
mm
Reference land pattern
6.0
2.0
11.05max
12.4 ±0.3
4.7 ±0.1
4.88±0.20
connections
0 to 0.3max
10.1max
AT-51
9.0
*2 Equivalent Series Resistance (3rd overtone)
Frequency (MHz)
(Range)
Equivalent Series
Resistance max.[Ω]
3.1875 to 3.2
3.2 to 3.5
3.5 to 3.8
3.8 to 4.2
4.2 to 4.883
4.883 to 5.2
5.2 to 5.7
5.7 to 6.6
6.6 to 6.8
6.8 to 8.3
8.3 to 10.7
10.7 to 12.2
12.2 to 15
15 to 28.63636
400
200
140
120
100
80
70
60
55
50
45
40
35
30
Overtone
Order
3rd overtone
Frequency (MHz)
(Range)
Equivalent Series
Resistance max.[Ω]
26 to 35
35 to 48
48 to 75
140
100
80
Frequency (MHz)
(Range)
Drive Level(μW)
3.1875 to 3.541
3.541 to 28.63636
26 to 60
60 to 75
500
50
500
10
*3 Drive Level
Overtone
Order
Fundamental
3rd overtone
cu39_071108_AT-51_e1
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