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
Oscillation Modes
Calibration Frequency Tolerance
at 25
°
C
Frequency Stability over Operating
Temperature Range
Operating Temperature Range
Load Capacitance
Equivalent Series Resistance (ESR)
Drive Level
Aging at 25° C
°
Shunt Capacitance
Pullability
Packaging
3.180 MHz - 72.000 MHz (Consult factory for specific available frequencies)
fundamental
fundamental
3rd overtone
(AT-cut)
(BT-cut)
(AT-cut)
3.180 - 30.000 MHz
24.001 - 47.000 MHz
27.000 - 72.000 MHz
±
50 PPM is standard, but tighter tolerances also available for
certain frequencies.
±
50 PPM is standard, but tighter tolerances also available for certain
operating temperature ranges.
0 - 70°C is standard, but can be extended to -40 - +85°C for certain
frequencies (just add ‘ E’ after model number).
10 pF -
∞
pF (∞ pF means Series Resonance). To be specified by customer.
See table on next page.
50µW is standard, but customer may specify different drive level
±
5 PPM per year
7 pF maximum
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).
Bulk (100 per bag, 2000 per box)
PART NUMBERING GUIDE:
n
The Pletronics part number for an LP crystal consists of the following 4 elements:
1.
2.
Model Number:
LP49, LP24, or LP21
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
Frequency of Operation in MHz
4.
EXAMPLES: LP49-SR-10.000 MHz; LP24-18-10.000 MHz; 3LP49-20-10.000 MHz
n
When customer’s requirements are non-standard, a special engineering part number will be assigned.
Telephone: (425) 776-1880, Fax: (425) 776-2760, e-mail: ple-sales@pletronics.com
X2A
LP49, LP24, & LP21 CRYSTALS
STANDARD EQUIVALENT SERIES RESISTANCE VALUES:
Oscillation Mode
Fundamental Mode
(AT-cut)
Frequency Range
3.180 - 7.000 MHz
7.001 - 15.999 MHz
16.000 - 25.000 MHz
25.001 - 30.000 MHz
24.001 - 36.000 MHz
36.001 - 47.000 MHz
27.000 - 56.000 MHz
56.001 - 72.000 MHz
ESR **
130 ohms maximum
50 ohms maximum
40 ohms maximum
40 ohms maximum
50 ohms maximum
100 ohms maximum
100 ohms maximum
100 ohms maximum
Fundamental Mode
(BT-cut)
3rd Overtone Mode
(AT-cut)
** ESR values lower than indicated may be available. Please contact factory for lower ESR values.
PACKAGE OUTLINE (NOT TO SCALE):
INCHES (MILLIMETERS)
Max Height (H)
LP49
LP24
LP21
.140 (3.56)
.100 (2.5)
.082 (2.1)
January 2000
X2B
Pletronics Inc., 19013 36
th
Ave. W., Suite H, Lynnwood, WA 98036-5761 USA
Embedded System
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