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 oscillators 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 Frequency Stability Package Type Minimum Operating Supply Voltage Output Level Maximum Operating Supply Voltage Mounting Type Minimum Operating Temperature Height Maximum Operating Temperature Dimensions Priced to Clear Load Capacitance
RS Stock No. 173-2555
Mfr. Part No.Q3204DC21053300
BrandEpson
£2.45
Each (In a Tube of 35)
Units
XO 1 MHz ±50ppm PDIP 4.5 V CMOS 5.5 V Through Hole -20 °C 5.3mm +70 °C 13.7 x 6.6 x 5.3mm - -
RS Stock No. 478-5749
Mfr. Part No.Q3204DC21053300
BrandEpson
£2.69
Each
Units
XO 1 MHz ±50ppm PDIP 4.5 V CMOS 5.5 V Through Hole -20 °C 5.3mm +70 °C 13.7 x 6.6 x 5.3mm - -
RS Stock No. 173-2510
Mfr. Part No.Q3102JF01000112
BrandEpson
£1.644
Each (On a Reel of 250)
Units
XO 32.768 kHz - JF 1.5 V CMOS 5.5 V Surface Mount -40 °C 1.5mm +85 °C 7.1 x 4.6 x 1.5mm - -
RS Stock No. 478-5064
Mfr. Part No.Q3102JF01000112
BrandEpson
£3.12
Each
Units
XO 32.768 kHz - JF 1.5 V CMOS 5.5 V Surface Mount -40 °C 1.5mm +85 °C 7.1 x 4.6 x 1.5mm - -
RS Stock No. 478-5171
Mfr. Part No.Q3309CA40006601
BrandEpson
£2.34
Each
Units
XO 16 MHz ±50ppm SMD 2.7 V CMOS 3.6 V Surface Mount -20 °C 1.4mm +70 °C 7 x 5 x 1.4mm - -
RS Stock No. 173-2590
Mfr. Part No.Q3309CA40006601
BrandEpson
£2.106
Each (On a Reel of 250)
Units
XO 16 MHz ±50ppm SMD 2.7 V CMOS 3.6 V Surface Mount -20 °C 1.4mm +70 °C 7 x 5 x 1.4mm - -
RS Stock No. 478-5187
Mfr. Part No.Q3309CA40041701
BrandEpson
£3.23
Each
Units
XO 1 MHz ±50ppm SMD 2.7 V CMOS 3.6 V Surface Mount -20 °C 1.4mm +70 °C 7 x 5 x 1.4mm - -
RS Stock No. 173-2591
Mfr. Part No.Q3309CA40041701
BrandEpson
£2.511
Each (On a Reel of 250)
Units
XO 1 MHz ±50ppm SMD 2.7 V CMOS 3.6 V Surface Mount -20 °C 1.4mm +70 °C 7 x 5 x 1.4mm - -
RS Stock No. 173-2585
Mfr. Part No.Q3309CA40021900
BrandEpson
£2.511
Each (On a Reel of 250)
Units
XO 100 MHz ±50ppm SMD 2.7 V CMOS 3.3 V Surface Mount -20 °C 1.4mm +70 °C 7 x 5 x 1.4mm - -
RS Stock No. 478-5086
Mfr. Part No.Q3309CA40021900
BrandEpson
£3.02
Each
Units
XO 100 MHz ±50ppm SMD 2.7 V CMOS 3.3 V Surface Mount -20 °C 1.4mm +70 °C 7 x 5 x 1.4mm - -
RS Stock No. 478-5222
Mfr. Part No.Q3309CA40004601
BrandEpson
£3.18
Each
Units
XO 24 MHz ±50ppm SMD 2.7 V CMOS 3.6 V Surface Mount -20 °C 1.4mm +70 °C 7 x 5 x 1.4mm - -
RS Stock No. 173-2595
Mfr. Part No.Q3309CA40004601
BrandEpson
£2.511
Each (On a Reel of 250)
Units
XO 24 MHz ±50ppm SMD 2.7 V CMOS 3.6 V Surface Mount -20 °C 1.4mm +70 °C 7 x 5 x 1.4mm - -
RS Stock No. 478-5301
Mfr. Part No.Q3309CA40004900
BrandEpson
£3.27
Each
Units
XO 50 MHz ±50ppm CA 2.7 V CMOS 3.6 V Surface Mount -20 °C 1.4mm +70 °C 7 x 5 x 1.4mm - -
RS Stock No. 173-2601
Mfr. Part No.Q3309CA40004900
BrandEpson
£2.511
Each (On a Reel of 250)
Units
XO 50 MHz ±50ppm CA 2.7 V CMOS 3.6 V Surface Mount -20 °C 1.4mm +70 °C 7 x 5 x 1.4mm - -
RS Stock No. 478-5238
Mfr. Part No.Q3309CA40010812
BrandEpson
£3.21
Each
Units
XO 25 MHz ±50ppm SMD 2.7 V CMOS 3.6 V Surface Mount -20 °C 1.4mm +70 °C 7 x 5 x 1.4mm - -
RS Stock No. 173-2605
Mfr. Part No.Q3309CA40010812
BrandEpson
£2.511
Each (On a Reel of 250)
Units
XO 25 MHz ±50ppm SMD 2.7 V CMOS 3.6 V Surface Mount -20 °C 1.4mm +70 °C 7 x 5 x 1.4mm - -
RS Stock No. 478-5682
Mfr. Part No.Q3204DC21006800
BrandEpson
£3.02
Each
Units
XO 10 MHz ±50ppm PDIP 4.5 V CMOS 5.5 V Through Hole -20 °C 5.3mm +70 °C 13.7 x 6.6 x 5.3mm - -
RS Stock No. 173-2598
Mfr. Part No.Q3309CA40000601
BrandEpson
£2.511
Each (On a Reel of 250)
Units
XO 40 MHz ±50ppm SMD 2.7 V CMOS 3.6 V Surface Mount -20 °C 1.4mm +70 °C 7 x 5 x 1.4mm - -
RS Stock No. 478-5272
Mfr. Part No.Q3309CA40000601
BrandEpson
£3.62
Each
Units
XO 40 MHz ±50ppm SMD 2.7 V CMOS 3.6 V Surface Mount -20 °C 1.4mm +70 °C 7 x 5 x 1.4mm - -
RS Stock No. 173-2550
Mfr. Part No.Q3204DC21006800
BrandEpson
£2.45
Each (In a Tube of 35)
Units
XO 10 MHz ±50ppm PDIP 4.5 V CMOS 5.5 V Through Hole -20 °C 5.3mm +70 °C 13.7 x 6.6 x 5.3mm - -