Pletronics LP49, LP24, LP21 Technical data

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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

3.180 - 30.000 MHz 24.001 - 47.000 MHz 27.000 - 72.000 MHz
Calibration Frequency Tolerance
at 25°°C
Frequency Stability over Operating
Temperature Range

Operating Temperature Range
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 50µW is standard, but customer may specify different drive level
Aging at 25°°C ± 5 PPM per year
Shunt Capacitance 7 pF maximum

Pullability

Packaging Bulk (100 per bag, 2000 per box)

PART NUMBERING GUIDE:

nn 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;

fundamental

(AT-cut)

± 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).

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).

fundamental

(BT-cut)

3rd overtone

(AT-cut)

When the load required is XX pF: LP49-XX, LP24-XX, or LP21-XX.

3. Optional 3rd 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

nn When customer’s requirements are non-standard, a special engineering part number will be assigned.

Telephone: [phone], Fax: [phone], e-mail: [e-mail] X2A

LP49, LP24, & LP21 CRYSTALS

STANDARD EQUIVALENT SERIES RESISTANCE VALUES:

Oscillation Mode Frequency Range ESR **

Fundamental Mode 3.180 - 7.000 MHz 130 ohms maximum

(AT-cut) 7.001 - 15.999 MHz 50 ohms maximum

16.000 - 25.000 MHz 40 ohms maximum

25.001 - 30.000 MHz 40 ohms maximum

Fundamental Mode 24.001 - 36.000 MHz 50 ohms maximum

(BT-cut) 36.001 - 47.000 MHz 100 ohms maximum

3rd Overtone Mode 27.000 - 56.000 MHz 100 ohms maximum

(AT-cut) 56.001 - 72.000 MHz 100 ohms maximum

** 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 .140 (3.56)
LP24 .100 (2.5)
LP21 .082 (2.1)

X2B Pletronics Inc., 19013 36th Ave. W., Suite H, Lynnwood, WA 98036-5761 USA

January 2000