Crystal Oscillators

A crystal oscillator is a electromechanical device, it's also an electronic oscillator circuit. The main purpose of an oscillator is to make use of a quartz crystal as a frequency. Crystal oscillator’s use the mechanical resonance of a vibrating crystal, of which is made up from a piezoelectric material. This process allows the oscillator to create and obtain an electric signal with a high precision frequency.


Where Crystal Oscillators are used


This type of frequency is mostly used to keep track of time within a wrist watch or a digital integrated circuit, to provide a stable clock signal. This is where this signal gained it's commonly referred to name "clock signal". This clock signal is used to synchronise the operation of the other electronic devices that make up the system the oscillator is housed in. An oscillator is also used to help stabilise frequencies for radio transmitters and receivers, used in clocks (clock oscillator), computers and cell phones. Quartz crystal can also be found inside test and measurement equipment such as counters, signal generators and oscilloscopes.


A little more information on Crystal Oscillators


  • Crystal oscillators are known to be superior to ceramic resonators, this is for a multitude of reasons. They offer higher stability, they're higher quality and are considerably lower in cost and more compact in size.

  • Quartz crystals are manufactured for frequencies that range from a few tens of kilohertz all the way up to hundreds of megahertz.

Types of Crystal Oscillators


  • TCXO - These are used when a temperature stability is needed and can't be attained through a standard crystal oscillator (XO) or a voltage controlled crystal oscillator (VCXO).

  • OCXO - This is an oven controlled crystal oscillator, a type of oscillator that achieves the highest frequency stability that a quartz crystal can. They are designed to operate inside a temperature controlled oven, they are physically larger and require more power to run.

  • VCXO - This is a voltage controlled crystal oscillator, it controls the change in crystal output by using a DC (direct current) voltage.

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Description Price Oscillator Type Output Frequency Output Level Frequency Stability Mounting Type Package Type Minimum Operating Supply Voltage Maximum Operating Supply Voltage Pin Count Length Minimum Operating Temperature Width Height Maximum Operating Temperature
RS Stock No. 703-2206
Mfr. Part No.ASFL1-20.000MHz-EK
BrandAbracon
TWD66.00
Each
units
Clock 20MHz HCMOS, TTL ±30ppm Surface Mount SMD - - - - -20°C - 1.3mm 70°C
RS Stock No. 111-0686
Mfr. Part No.KC7050A18.4320C30E00
BrandKYOCERA
TWD92.00
Each
units
Clock 18.432MHz CMOS ±50ppm Surface Mount CSMD - - - - -10°C - 1.6mm 70°C
RS Stock No. 693-9153
Mfr. Part No.XO91050UITA-12.000
BrandEuroquartz
TWD119.00
Each
units
XO 12MHz HCMOS, LSTTL ±50ppm Surface Mount SMD - - - - -40°C - 1.4mm 85°C
RS Stock No. 478-5749
Mfr. Part No.Q3204DC21053300
BrandEpson
TWD121.00
Each
units
XO 1MHz CMOS ±50ppm Through Hole PDIP - - - - -20°C - 5.3mm 70°C
RS Stock No. 796-0564
Mfr. Part No.QX8T50B4.000000B50TT
BrandQANTEK
TWD82.00
Each
units
XO 4MHz HCMOS ±50ppm Through Hole PDIP - - - - -40°C - 5.08mm 85°C
RS Stock No. 478-5086
Mfr. Part No.Q3309CA40021900
BrandEpson
TWD134.00
Each
units
XO 100MHz CMOS ±50ppm Surface Mount SMD - - - - -20°C - 1.4mm 70°C
RS Stock No. 173-2561
Mfr. Part No.Q3204DC21032400
BrandEPSON
TWD76.00
Each (In a Tube of 35)
units
XO 3.6864MHz CMOS ±50ppm Through Hole PDIP - - - - -20°C - 5.3mm 70°C
RS Stock No. 478-5812
Mfr. Part No.Q3204DC21032400
BrandEPSON
TWD131.00
Each
units
XO 3.6864MHz CMOS ±50ppm Through Hole PDIP - - - - -20°C - 5.3mm 70°C
RS Stock No. 796-0463
Mfr. Part No.QX14T50B1.843200B50TT
BrandQANTEK
TWD74.00
Each
units
XO 1.8432MHz HCMOS ±50ppm Through Hole DIP14 - - - - -40°C - 5.08mm 85°C
RS Stock No. 173-2560
Mfr. Part No.Q3204DC21033300
BrandEpson
TWD68.20
Each (In a Tube of 35)
units
XO 2MHz CMOS ±50ppm Through Hole PDIP - - - - -20°C - 5.3mm 70°C
RS Stock No. 173-4655
Mfr. Part No.QX8T50B4.000000B50TT
BrandQANTEK
TWD61.00
Each (In a Tube of 40)
units
XO 4MHz HCMOS ±50ppm Through Hole PDIP - - - - -40°C - 5.08mm 85°C
RS Stock No. 173-5868
Mfr. Part No.QX14T50B1.843200B50TT
BrandQANTEK
TWD61.00
Each (In a Tube of 25)
units
Clock 1.8432MHz HCMOS ±50ppm Through Hole DIP14 - - - - -40°C - 5.08mm 85°C
RS Stock No. 111-0792
Mfr. Part No.KC2520B27.0000C10E00
BrandKYOCERA
TWD69.00
Each
units
Clock 27MHz CMOS ±50ppm Surface Mount CSMD - - - - -10°C - 0.7mm 70°C
RS Stock No. 173-2555
Mfr. Part No.Q3204DC21053300
BrandEpson
TWD67.00
Each (In a Tube of 35)
units
XO 1MHz CMOS ±50ppm Through Hole PDIP - - - - -20°C - 5.3mm 70°C
RS Stock No. 173-2386
Mfr. Part No.Q33210BE0001011
BrandEpson
TWD95.00
Each (On a Reel of 250)
units
XO 27MHz CMOS ±100ppm Surface Mount SMD - - - - -40°C - 0.8mm 85°C
RS Stock No. 173-5888
Mfr. Part No.QX8T50B40.00000B50TT
BrandQANTEK
TWD61.00
Each (In a Tube of 40)
units
Clock 40MHz HCMOS ±50ppm Through Hole PDIP - - - - -40°C - 5.08mm 85°C
RS Stock No. 111-0784
Mfr. Part No.KC2520B18.4320C10E00
BrandKYOCERA
TWD92.00
Each
units
Clock 18.432MHz CMOS ±50ppm Surface Mount CSMD - - - - -10°C - 0.7mm 70°C
RS Stock No. 904-7799
Mfr. Part No.X1G004481000412
BrandEPSON
TWD134.00
Each
units
XO 27MHz CMOS - Surface Mount - - - - - - - 1.3mm -
RS Stock No. 146-3990
Mfr. Part No.LFSPXO018041 831018041
BrandIQD
TWD38.60
Each (On a Reel of 1000)
units
Clock 4MHz HCMOS ±50ppm Surface Mount SMD - - - - 0°C - 1.4mm 70°C
RS Stock No. 693-9222
Mfr. Part No.XO53050UITA-24.576
BrandEuroquartz
TWD61.00
Each
units
XO 24.576MHz HCMOS, LSTTL ±50ppm Surface Mount SMD - - - - -40°C - 1mm 85°C