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. 173-2587
Mfr. Part No.Q3309CA40006201
BrandEpson
HK$21.372
Each (On a Reel of 250)
units
XO 125MHz CMOS ±50ppm Surface Mount SMD - - - - -20°C - 1.4mm 70°C
RS Stock No. 813-6194
Mfr. Part No.QX733A8.000000B15R
BrandQANTEK
HK$18.23
Each
units
Clock 8MHz HCMOS ±25ppm Surface Mount SMD - - - - -40°C - 1.4mm 85°C
RS Stock No. 173-5877
Mfr. Part No.QX14T50B16.00000B50TT
BrandQANTEK
HK$26.607
Each (In a Tube of 25)
units
Clock 16MHz HCMOS ±50ppm Through Hole DIP14 - - - - -40°C - 5.08mm 85°C
RS Stock No. 478-5137
Mfr. Part No.Q3309CA40006201
BrandEpson
HK$39.73
Each
units
XO 125MHz CMOS ±50ppm Surface Mount SMD - - - - -20°C - 1.4mm 70°C
RS Stock No. 173-2572
Mfr. Part No.Q3204DC21025900
BrandEpson
HK$18.569
Each (In a Tube of 35)
units
XO 5MHz CMOS ±50ppm Through Hole PDIP - - - - -20°C - 5.3mm 70°C
RS Stock No. 478-5929
Mfr. Part No.Q3204DC21025900
BrandEpson
HK$32.77
Each
units
XO 5MHz CMOS ±50ppm Through Hole PDIP - - - - -20°C - 5.3mm 70°C
RS Stock No. 173-2558
Mfr. Part No.Q3204DC21044200
BrandEpson
HK$18.566
Each (In a Tube of 35)
units
XO 24MHz CMOS ±50ppm Through Hole PDIP - - - - -20°C - 5.3mm 70°C
RS Stock No. 672-7647
Mfr. Part No.OV-7604-C7-STD-020
HK$39.95
Each
units
Clock 32.768kHz HCMOS ±20ppm Surface Mount SMD - - - - -40°C - 1mm 85°C
RS Stock No. 767-5314
Mfr. Part No.5H8ET-32.000
BrandMERCURY
HK$22.50
Each
units
Clock 32MHz HCMOS, TTL ±50ppm Through Hole PDIP - - - - -40°C - 5.08mm 85°C
RS Stock No. 478-5727
Mfr. Part No.Q3204DC21000300
BrandEpson
HK$33.81
Each
units
XO 16MHz CMOS ±50ppm Through Hole PDIP - - - - -20°C - 5.3mm 70°C
RS Stock No. 173-5846
Mfr. Part No.S75005-20.000-X-15
BrandAKER
HK$10.991
Each (On a Reel of 250)
units
Clock 20MHz HCMOS ±50ppm Surface Mount SMD - - - - -40°C - 1.3mm 85°C
RS Stock No. 146-3997
Mfr. Part No.LFSPXO018035 831018035
BrandIQD
HK$8.471
Each (In a Bag of 100)
units
Clock 50MHz HCMOS, TTL ±50ppm Surface Mount SMD - - - - 0°C - 1.4mm 70°C
RS Stock No. 667-6350
Mfr. Part No.Q33310F70003711
BrandEpson
HK$28.52
Each
units
XO 4MHz CMOS ±100ppm Surface Mount SMD - - - - -40°C - 1.05mm 85°C
RS Stock No. 478-5187
Mfr. Part No.Q3309CA40041701
BrandEpson
HK$39.73
Each
units
XO 1MHz CMOS ±50ppm Surface Mount SMD - - - - -20°C - 1.4mm 70°C
RS Stock No. 478-5115
Mfr. Part No.Q3309CA40013301
BrandEpson
HK$39.14
Each
units
XO 10MHz CMOS ±50ppm Surface Mount SMD - - - - -20°C - 1.4mm 70°C
RS Stock No. 173-2426
Mfr. Part No.Q33310F70003711
BrandEpson
HK$8.323
Each (On a Reel of 250)
units
XO 4MHz CMOS ±100ppm Surface Mount SMD - - - - -40°C - 1.05mm 85°C
RS Stock No. 667-6280
Mfr. Part No.Q3102JC01000111
BrandEpson
HK$24.48
Each
units
XO 32.768kHz CMOS ±50ppm Surface Mount SMD - - - - -40°C - 2.65mm 85°C
RS Stock No. 478-5171
Mfr. Part No.Q3309CA40006601
BrandEpson
HK$28.77
Each
units
XO 16MHz CMOS ±50ppm Surface Mount SMD - - - - -20°C - 1.4mm 70°C
RS Stock No. 173-2586
Mfr. Part No.Q3309CA40013301
BrandEpson
HK$24.913
Each (On a Reel of 250)
units
XO 10MHz CMOS ±50ppm Surface Mount SMD - - - - -20°C - 1.4mm 70°C
RS Stock No. 671-9839
Mfr. Part No.S75005-20.000-X-15
BrandAKER
HK$20.05
Each
units
Clock 20MHz HCMOS ±50ppm Surface Mount SMD - - - - -40°C - 1.3mm 85°C