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 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. 703-7144
Mfr. Part No.AS-24.000-18-SMD
BrandRALTRON
TWD17.00
Each (In a Bag of 10)
units
- - - ±50ppm Surface Mount HC-49-US SMD - - 2 12mm -20 °C 4.8mm 4.6mm +70 °C
RS Stock No. 813-6318
Mfr. Part No.QX233A8.000000B15R
BrandQANTEK
TWD76.00
Each
units
Clock 8 MHz HCMOS ±25ppm Surface Mount SMD - 3.3 V - - -40 °C - 0.95mm +85 °C
RS Stock No. 173-5897
Mfr. Part No.QX233A8.000000B15R
BrandQANTEK
TWD85.70
Each (On a Reel of 1000)
units
Clock 8 MHz HCMOS ±25ppm Surface Mount SMD - 3.3 V - - -40 °C - 0.95mm +85 °C
RS Stock No. 703-2414
Mfr. Part No.ASE3-25.000MHz-K
BrandAbracon
TWD78.00
Each
units
Clock 25 MHz CMOS ±30ppm Surface Mount SMD 1.71 V 1.89 V - - -10 °C - 1.2mm +70 °C
RS Stock No. 173-4683
Mfr. Part No.F3345-160
TWD107.50
Each (On a Reel of 1000)
units
XO 16 MHz HCMOS, TTL ±100ppm Surface Mount SMD 4.5 V 5.5 V - - -10 °C - 1.5mm +70 °C
RS Stock No. 471-9124
Mfr. Part No.F3345-160
TWD198.00
Each
units
- 16 MHz HCMOS, TTL ±100ppm Surface Mount SMD 4.5 V 5.5 V 4 7.5mm -10 °C 5.2mm 1.5mm +70 °C
RS Stock No. 173-4578
Mfr. Part No.QX733A12.00000B15R
BrandQANTEK
TWD71.70
Each (On a Reel of 1000)
units
Clock 12 MHz HCMOS ±25ppm Surface Mount SMD - 3.3 V - - -40 °C - 1.4mm +85 °C
RS Stock No. 173-5857
Mfr. Part No.S53305-24.000-X
BrandAKER
TWD110.30
Each (On a Reel of 250)
units
Clock 24 MHz CMOS ±50ppm Surface Mount SMD 3.14 V 3.46 V - - -40 °C - 0.95mm +85 °C
RS Stock No. 693-9241
Mfr. Part No.XO53050UITA-50.000
BrandEuroquartz
TWD136.00
Each
units
XO 50 MHz HCMOS, LSTTL ±50ppm Surface Mount SMD - - - - -40 °C - 1mm +85 °C
RS Stock No. 173-4622
Mfr. Part No.XO53050UITA-50.000
BrandEuroquartz
TWD78.00
Each (On a Reel of 1000)
units
XO 50 MHz HCMOS, LSTTL ±50ppm Surface Mount SMD - - - - -40 °C - 1mm +85 °C
RS Stock No. 813-6208
Mfr. Part No.QX733A12.00000B15R
BrandQANTEK
TWD48.00
Each
units
Clock 12 MHz HCMOS ±25ppm Surface Mount SMD - 3.3 V - - -40 °C - 1.4mm +85 °C
RS Stock No. 671-9696
Mfr. Part No.S53305-24.000-X
BrandAKER
TWD68.00
Each
units
Clock 24 MHz CMOS ±50ppm Surface Mount SMD 3.14 V 3.46 V - - -40 °C - 0.95mm +85 °C
RS Stock No. 478-5171
Mfr. Part No.Q3309CA40006601
BrandEpson
TWD102.00
Each
units
XO 16 MHz CMOS ±50ppm Surface Mount SMD 2.7 V 3.6 V - - -20 °C - 1.4mm +70 °C
RS Stock No. 672-0621
Mfr. Part No.3H53ET-24.000
BrandMERCURY
TWD71.00
Each
units
Clock 24 MHz HCMOS ±50ppm Surface Mount SMD 3.135 V 3.465 V - - -40 °C - 1.2mm +85 °C
RS Stock No. 111-0718
Mfr. Part No.KC7050A50.0000C50D00
BrandKYOCERA
TWD78.00
Each
units
Clock 50 MHz CMOS ±50ppm Surface Mount CSMD 4.5 V 5.5 V - - -10 °C - 1.6mm +70 °C
RS Stock No. 173-5881
Mfr. Part No.QX14T50B50.00000B50TT
BrandQANTEK
TWD95.50
Each (In a Tube of 25)
units
Clock 50 MHz HCMOS ±50ppm Through Hole DIP14 4.5 V 5.5 V - - -40 °C - 5.08mm +85 °C
RS Stock No. 173-2590
Mfr. Part No.Q3309CA40006601
BrandEpson
TWD133.10
Each (On a Reel of 250)
units
XO 16 MHz CMOS ±50ppm Surface Mount SMD 2.7 V 3.6 V - - -20 °C - 1.4mm +70 °C
RS Stock No. 796-0555
Mfr. Part No.QX14T50B50.00000B50TT
BrandQANTEK
TWD80.00
Each
units
XO 50 MHz HCMOS ±50ppm Through Hole DIP14 4.5 V 5.5 V - - -40 °C - 5.08mm +85 °C
RS Stock No. 173-2423
Mfr. Part No.Q33310F70018711
BrandEpson
TWD122.60
Each (On a Reel of 250)
units
XO 26 MHz CMOS ±50ppm Surface Mount SMD 2.7 V 3.6 V - - -40 °C - 1.05mm +85 °C
RS Stock No. 814-1629
Mfr. Part No.50.0MHz CFPS-73 ±50ppm -40+85°C 3.3V
BrandIQD
TWD51.00
Each
units
Clock 50 MHz HCMOS ±50ppm Surface Mount SMD - 3.3 V - - -40 °C - 1.4mm +85 °C