Crystal Oscillator 2Pin HC-49S 455KHZ

Description

Crystal Oscillator 2Pin HC-49S 455KHZ

Crystal Oscillator 2Pin HC-49S 455KHZ provides both series and parallel resonance. The series resonance is a few kilohertz lower than the parallel one. Crystals below 30 MHz are generally operated between series and parallel resonance, which means that the crystal appears as an inductive reactance in operation, this inductance forming a parallel resonant circuit with externally connected parallel capacitance. Any small additional capacitance in parallel with the crystal will thus pull the frequency downwards. Moreover, the effective inductive reactance of the crystal can be reduced by adding a capacitor in series with the crystal. This latter technique can provide a useful method of trimming the oscillatory frequency within a narrow range; in this case inserting a capacitor in series with the crystal will raise the frequency of oscillation. For a crystal to operate at its specified frequency, the electronic circuit has to be exactly that specified by the crystal manufacturer. Note that these points imply a subtlety concerning crystal oscillators in this frequency range: the crystal does not usually oscillate at precisely either of its resonant frequencies.

A crystal oscillator is an electronic oscillator circuit that uses the mechanical resonance of a vibrating crystal of piezoelectric material to create an electrical signal with a very precise frequency.

Features of 455KHz Crystal Oscillators:

• Stability in frequency.
• Small in size.
• Low cost.
• Easy of interfacing.

Application of 455KHz Crystal Oscillators:

• Resonance circuit.
• DIY projects.
• Electrical/electronic projects.
• Clock generator for microcontroller.
• DTMF decoder.