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 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. 144-1119
BrandRS PRO
£2.896
Each (In a Pack of 5)
Units
Clock 100MHz ±50ppm SMD - CMOS 3.3V dc Surface Mount -10°C 1.8mm 70°C 7 x 5 x 1.8mm - -
RS Stock No. 144-1116
BrandRS PRO
£0.674
Each (In a Pack of 5)
Units
Clock 33.33MHz ±50ppm SMD - CMOS 3.3V dc Surface Mount -10°C 1.8mm 70°C 7 x 5 x 1.8mm - -
RS Stock No. 144-5011
BrandRS PRO
£0.61
Each (In a Pack of 5)
Units
Clock 4MHz ±50ppm SMD - HCMOS 3.3V dc Surface Mount -10°C 1mm 70°C 3.2 x 2.5 x 1mm Yes -
RS Stock No. 144-1098
BrandRS PRO
£0.914
Each (In a Pack of 5)
Units
Clock 25MHz ±50ppm SMD - CMOS 1.8V dc Surface Mount -20°C 0.8mm 70°C 2 x 1.6 x 0.8mm - -
RS Stock No. 144-5009
BrandRS PRO
£1.738
Each (In a Pack of 5)
Units
Clock 25MHz ±50ppm SMD - HCMOS 3.3V dc Surface Mount -40°C 1mm 85°C 3.2 x 2.5 x 1mm - -
RS Stock No. 144-1113
BrandRS PRO
£1.738
Each (In a Pack of 5)
Units
Clock 25MHz ±50ppm SMD - CMOS 3.3V dc Surface Mount -40°C 1.8mm 85°C 7 x 5 x 1.8mm - -
RS Stock No. 144-1109
BrandRS PRO
£1.738
Each (In a Pack of 5)
Units
Clock 10MHz ±50ppm SMD - CMOS 3.3V dc Surface Mount -40°C 1.8mm 85°C 7 x 5 x 1.8mm - -
RS Stock No. 144-1102
BrandRS PRO
£1.154
Each (In a Pack of 5)
Units
Clock 20MHz ±50ppm SMD - CMOS 1.8V dc Surface Mount -20°C 1mm 70°C 2.5 x 2 x 1mm - -
RS Stock No. 144-1115
BrandRS PRO
£0.838
Each (In a Pack of 5)
Units
Clock 3.68MHz ±50ppm SMD - CMOS 3.3V dc Surface Mount -40°C 1.8mm 85°C 7 x 5 x 1.8mm - -
RS Stock No. 144-1108
BrandRS PRO
£2.24
Each (In a Pack of 5)
Units
Clock 32MHz ±25ppm SMD - CMOS 3.3V dc Surface Mount -40°C 1.8mm 85°C 7 x 5 x 1.8mm - -
RS Stock No. 144-1124
BrandRS PRO
£1.738
Each (In a Pack of 5)
Units
Clock 10MHz ±50ppm SMD - CMOS 5.5V dc Surface Mount -10°C 1.8mm 70°C 7 x 5 x 1.8mm - -
RS Stock No. 144-1101
BrandRS PRO
£0.306
Each (In a Pack of 5)
Units
Clock 10MHz ±50ppm SMD - CMOS 3.3V dc Surface Mount -40°C 1mm 85°C 2.5 x 2 x 1mm - -
RS Stock No. 144-1111
BrandRS PRO
£2.086
Each (In a Pack of 5)
Units
Clock 24MHz ±50ppm SMD - CMOS 3.3V dc Surface Mount -40°C 1.8mm 85°C 7 x 5 x 1.8mm - -
RS Stock No. 144-1123
BrandRS PRO
£1.224
Each (In a Pack of 5)
Units
Clock 80MHz ±50ppm SMD - CMOS 3.3V dc Surface Mount -40°C 1.8mm 85°C 7 x 5 x 1.8mm - -
RS Stock No. 144-1122
BrandRS PRO
£2.065
Each (In a Pack of 2)
Units
Clock 156.25MHz ±50ppm SMD - CMOS 3.3V dc Surface Mount -40°C 1.8mm 85°C 7 x 5 x 1.8mm - -
RS Stock No. 144-1120
BrandRS PRO
£2.366
Each (In a Pack of 5)
Units
Clock 125MHz ±50ppm SMD - CMOS 3.3V dc Surface Mount -40°C 1.8mm 85°C 7 x 5 x 1.8mm - -
RS Stock No. 478-5749
Mfr. Part No.Q3204DC21053300
BrandEpson
£2.69
Each
Units
XO 1MHz ±50ppm PDIP - CMOS - Through Hole -20°C 5.3mm 70°C 13.7 x 6.6 x 5.3mm - -
RS Stock No. 173-2555
Mfr. Part No.Q3204DC21053300
BrandEpson
£2.45
Each (In a Tube of 35)
Units
XO 1MHz ±50ppm PDIP - CMOS - Through Hole -20°C 5.3mm 70°C 13.7 x 6.6 x 5.3mm - -
RS Stock No. 672-7647
Mfr. Part No.OV-7604-C7-STD-020
£3.25
Each
Units
Clock 32.768kHz ±20ppm SMD - HCMOS - Surface Mount -40°C 1mm 85°C 3.2 x 1.5 x 1mm - -
RS Stock No. 173-4698
Mfr. Part No.OV-7604-C7-STD-020
£2.507
Each (On a Reel of 3000)
Units
XO 32.768kHz ±20ppm SMD - HCMOS - Surface Mount -40°C 1mm 85°C 3.2 x 1.5 x 1mm - -