Telephone: (425) 776-1880, Fax: (425) 776-2760, e-mail: ple-sales@pletronics.com
X2A
LP49, LP24, & LP21
CRYSTALS IN HC-49/S THRU-HOLE PACKAGE
(LP49: 3.5 mm high; LP24: 2.5 mm high; LP21: 2.1mm high)
STANDARD SPECIFICATIONS:
Frequency Range
3.180 MHz - 72.000 MHz (Consult factory for specific available frequencies)
Oscillation Modes
fundamental
(AT-cut)
fundamental
(BT-cut)
3rd overtone
(AT-cut)
3.180 - 30.000 MHz
24.001 - 47.000 MHz
27.000 - 72.000 MHz
Calibration Frequency Tolerance
at 25
°°C
± 50 PPM is standard, but tighter tolerances also available for
certain frequencies.
Frequency Stability over Operating
Temperature Range
± 50 PPM is standard, but tighter tolerances also available for certain
operating temperature ranges.
Operating Temperature Range
0 - 70
°C is standard, but can be extended to -40 - +85°C for certain
frequencies (just add ‘ E’ after model number).
Load Capacitance
10 pF -
∞ pF (∞ pF means Series Resonance). To be specified by customer.
Equivalent Series Resistance (ESR)
See table on next page.
Drive Level
50
µW is standard, but customer may specify different drive level
Aging at 25
°°C
± 5 PPM per year
Shunt Capacitance
7 pF maximum
Pullability
May be specified by customer in terms of frequency shift required over a
certain range of load capacitance, (e.g.+100 PPM from CL=12 to CL=18 pF)
This requirement may be expressed also in terms of motional capacitance
in fanto-Farad (fF).
Packaging
Bulk (100 per bag, 2000 per box)
PART NUMBERING GUIDE:
n
n The Pletronics part number for an LP crystal consists of the following 4 elements:
1.
Model Number: LP49, LP24, or LP21
2.
Load Capacitance:
When the load required is
∞ pF, that is, the calibration is at series resonance:
LP49-SR, LP24-SR, or LP21-SR;
When the load required is XX pF: LP49-XX, LP24-XX, or LP21-XX.
3.
Optional 3
rd Lead from the Base (Case Grounded):
3LP49
4.
Frequency of Operation in MHz
EXAMPLES: LP49-SR-10.000 MHz; LP24-18-10.000 MHz; 3LP49-20-10.000 MHz
n
n When customer’s requirements are non-standard, a special engineering part number will be assigned.
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