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. 478-5799
Mfr. Part No.Q3204DC21028900
BrandEpson
€3.06
Each
units
XO 25MHz CMOS ±50ppm Through Hole PDIP - - - - -20°C - 5.3mm 70°C
RS Stock No. 173-2559
Mfr. Part No.Q3204DC21028900
BrandEpson
€1.752
Each (In a Tube of 35)
units
XO 25MHz CMOS ±50ppm Through Hole PDIP - - - - -20°C - 5.3mm 70°C
RS Stock No. 173-5878
Mfr. Part No.QX14T50B25.00000B50TT
BrandQANTEK
€1.486
Each (In a Tube of 25)
units
Clock 25MHz HCMOS ±50ppm Through Hole DIP14 - - - - -40°C - 5.08mm 85°C
RS Stock No. 796-0536
Mfr. Part No.QX14T50B25.00000B50TT
BrandQANTEK
€1.84
Each
units
XO 25MHz HCMOS ±50ppm Through Hole DIP14 - - - - -40°C - 5.08mm 85°C
RS Stock No. 813-6214
Mfr. Part No.QX733A24.00000B15R
BrandQANTEK
€1.61
Each
units
Clock 24MHz HCMOS ±25ppm Surface Mount SMD - - - - -40°C - 1.4mm 85°C
RS Stock No. 672-7647
Mfr. Part No.OV-7604-C7-STD-020
€3.61
Each
units
Clock 32.768kHz HCMOS ±20ppm Surface Mount SMD - - - - -40°C - 1mm 85°C
RS Stock No. 173-4579
Mfr. Part No.QX733A24.00000B15R
BrandQANTEK
€1.313
Each (On a Reel of 1000)
units
Clock 24MHz HCMOS ±25ppm Surface Mount SMD - - - - -40°C - 1.4mm 85°C
RS Stock No. 173-4698
Mfr. Part No.OV-7604-C7-STD-020
€2.783
Each (On a Reel of 3000)
units
XO 32.768kHz HCMOS ±20ppm Surface Mount SMD - - - - -40°C - 1mm 85°C
RS Stock No. 703-2102
Mfr. Part No.ASV-16.000MHZ-E-T
BrandAbracon
€0.982
Each (In a Bag of 10)
units
XO 16MHz HCMOS, TTL ±20ppm Surface Mount SMD - - - - -20°C - 1.8mm 70°C
RS Stock No. 767-5260
Mfr. Part No.5H14ET-16.000
BrandMERCURY
€2.14
Each
units
Clock 16MHz HCMOS, TTL ±50ppm Through Hole PDIP - - - - -40°C - 5.08mm 85°C
RS Stock No. 703-7129
Mfr. Part No.AS-16.000-18-SMD
BrandRALTRON
€0.485
Each (In a Bag of 10)
units
- - - ±50ppm Surface Mount HC-49-US SMD - - - - -20°C - 4.6mm 70°C
RS Stock No. 767-5336
Mfr. Part No.5H8ET-16.000
BrandMERCURY
€2.00
Each
units
Clock 16MHz HCMOS, TTL ±50ppm Through Hole PDIP - - - - -40°C - 5.08mm 85°C
RS Stock No. 478-5783
Mfr. Part No.Q3204DC21044200
BrandEpson
€1.51
Each
units
XO 24MHz CMOS ±50ppm Through Hole PDIP - - - - -20°C - 5.3mm 70°C
RS Stock No. 815-0434
Mfr. Part No.QTX733A33.3330B15R
€1.85
Each
units
Clock 33.3333MHz HCMOS, TTL ±25ppm Surface Mount SMD - - - - -40°C - 1.4mm 85°C
RS Stock No. 478-5301
Mfr. Part No.Q3309CA40004900
BrandEpson
€3.70
Each
units
XO 50MHz CMOS ±50ppm Surface Mount CA - - - - -20°C - 1.4mm 70°C
RS Stock No. 478-5907
Mfr. Part No.Q3204DC21031500
BrandEpson
€3.14
Each
units
XO 4MHz CMOS ±50ppm Through Hole PDIP - - - - -20°C - 5.3mm 70°C
RS Stock No. 745-1335
Mfr. Part No.FXO-HC335R-30
€2.20
Each
units
- 30MHz HCMOS ±50ppm Surface Mount SMD - - - - -40°C - 1mm 85°C
RS Stock No. 173-2601
Mfr. Part No.Q3309CA40004900
BrandEpson
€2.017
Each (On a Reel of 250)
units
XO 50MHz CMOS ±50ppm Surface Mount CA - - - - -20°C - 1.4mm 70°C
RS Stock No. 667-6280
Mfr. Part No.Q3102JC01000111
BrandEpson
€2.25
Each
units
XO 32.768kHz CMOS ±50ppm Surface Mount SMD - - - - -40°C - 2.65mm 85°C
RS Stock No. 173-4640
Mfr. Part No.QX8T50B2.457600B50TT
BrandQANTEK
€1.484
Each (In a Tube of 40)
units
XO 2.4576MHz HCMOS ±50ppm Through Hole PDIP - - - - -40°C - 5.08mm 85°C