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 Mounting Type Frequency Stability Package Type Minimum Operating Supply Voltage Maximum Operating Supply Voltage Pin Count Length Width Height Dimensions Minimum Operating Temperature
RS Stock No. 703-7144
Mfr. Part No.AS-24.000-18-SMD
BrandRALTRON
TWD16
Each (In a Bag of 10)
units
- - - Surface Mount ±50ppm HC-49-US SMD - - 2 12mm 4.8mm 4.6mm 12 x 4.8 x 4.6mm -20 °C
RS Stock No. 813-6318
Mfr. Part No.QX233A8.000000B15R
BrandQANTEK
TWD65
Each
units
- 8 MHz HCMOS Surface Mount ±25ppm SMD - 3.3 V 4 2.5mm 2mm 0.95mm 2.5 x 2 x 0.95mm -40 °C
RS Stock No. 173-5897
Mfr. Part No.QX233A8.000000B15R
BrandQANTEK
TWD86
Each (On a Reel of 1000)
units
- 8 MHz HCMOS Surface Mount ±25ppm SMD - 3.3 V 4 2.5mm 2mm 0.95mm 2.5 x 2 x 0.95mm -40 °C
RS Stock No. 703-2414
Mfr. Part No.ASE3-25.000MHz-K
BrandAbracon
TWD78
Each
units
- 25 MHz CMOS Surface Mount ±30ppm SMD 1.71 V 1.89 V 4 3.2mm 2.5mm 1.2mm 3.2 x 2.5 x 1.2mm -10 °C
RS Stock No. 173-4578
Mfr. Part No.QX733A12.00000B15R
BrandQANTEK
TWD72
Each (On a Reel of 1000)
units
- 12 MHz HCMOS Surface Mount ±25ppm SMD - 3.3 V 4 7mm 5mm 1.4mm 7 x 5 x 1.4mm -40 °C
RS Stock No. 671-9696
Mfr. Part No.S53305-24.000-X
BrandAKER
TWD68
Each
units
- 24 MHz CMOS Surface Mount ±50ppm SMD 3.14 V 3.46 V 4 5mm 3.2mm 0.95mm 5 x 3.2 x 0.95mm -40 °C
RS Stock No. 471-9124
Mfr. Part No.F3345-160
TWD198
Each
units
- 16 MHz HCMOS, TTL Surface Mount ±100ppm SMD 4.5 V 5.5 V 4 7.5mm 5.2mm 1.5mm 7.5 x 5.2 x 1.5mm -10 °C
RS Stock No. 173-4622
Mfr. Part No.XO53050UITA-50.000
BrandEuroquartz
TWD78
Each (On a Reel of 1000)
units
- 50 MHz HCMOS, LSTTL Surface Mount ±50ppm SMD - - 4 5mm 3.2mm 1mm 5 x 3.2 x 1mm -40 °C
RS Stock No. 813-6208
Mfr. Part No.QX733A12.00000B15R
BrandQANTEK
TWD48
Each
units
- 12 MHz HCMOS Surface Mount ±25ppm SMD - 3.3 V 4 7mm 5mm 1.4mm 7 x 5 x 1.4mm -40 °C
RS Stock No. 173-4683
Mfr. Part No.F3345-160
TWD108
Each (On a Reel of 1000)
units
- 16 MHz HCMOS, TTL Surface Mount ±100ppm SMD 4.5 V 5.5 V 4 7.5mm 5.2mm 1.5mm 7.5 x 5.2 x 1.5mm -10 °C
RS Stock No. 173-5857
Mfr. Part No.S53305-24.000-X
BrandAKER
TWD81
Each (On a Reel of 250)
units
- 24 MHz CMOS Surface Mount ±50ppm SMD 3.14 V 3.46 V 4 5mm 3.2mm 0.95mm 5 x 3.2 x 0.95mm -40 °C
RS Stock No. 693-9241
Mfr. Part No.XO53050UITA-50.000
BrandEuroquartz
TWD136
Each
units
- 50 MHz HCMOS, LSTTL Surface Mount ±50ppm SMD - - 4 5mm 3.2mm 1mm 5 x 3.2 x 1mm -40 °C
RS Stock No. 729-3329
Mfr. Part No.OCXOV-AV5-10.000
TWD7,230
Each
units
- 10 MHz HCMOS Through Hole ±0.2ppm PDIP 4.8 V 5.2 V 14 20.14mm 12.52mm 7.8mm 20.14 x 12.52 x 7.8mm 0 °C
RS Stock No. 111-0751
Mfr. Part No.KC5032A22.5792CM0E00
BrandKYOCERA
TWD78
Each
units
- 22.5792 MHz CMOS Surface Mount ±50ppm CSMD 1.6 V 5.5 V 4 5mm 3.2mm 1mm 5 x 3.2 x 1mm -10 °C
RS Stock No. 672-0621
Mfr. Part No.3H53ET-24.000
BrandMERCURY
TWD71
Each
units
- 24 MHz HCMOS Surface Mount ±50ppm SMD 3.135 V 3.465 V 4 5mm 3.2mm 1.2mm 5 x 3.2 x 1.2mm -40 °C
RS Stock No. 153-3667
Mfr. Part No.LFSPXO018034
BrandIQD
TWD45
Each (In a Pack of 10)
units
- - - - - - - - - - - - - -
RS Stock No. 146-3997
Mfr. Part No.LFSPXO018035
BrandIQD
TWD35
Each (In a Bag of 100)
units
Clock Oscillator 50 MHz HCMOS, TTL Surface Mount ±50ppm SMD - 5 V 4 7.2mm 5.2mm 1.4mm 7.2 x 5.2 x 1.4mm 0 °C
RS Stock No. 815-0535
Mfr. Part No.QTX533A33.0000B15R
TWD84
Each
units
- 33 MHz HCMOS, TTL Surface Mount ±25ppm SMD - 3.3 V 4 5.2mm 3.4mm 1.3mm 5.2 x 3.4 x 1.3mm -40 °C
RS Stock No. 672-7647
Mfr. Part No.OV-7604-C7-STD-020
TWD120
Each
units
- 32.768 kHz HCMOS Surface Mount 20ppm SMD 1.2 V 5.5 V 4 3.2mm 1.5mm 1mm 3.2 x 1.5 x 1mm -40 °C
RS Stock No. 173-4643
Mfr. Part No.QX8T50B7.372800B50TT
BrandQANTEK
TWD96
Each (In a Tube of 40)
units
- 7.3728 MHz HCMOS Through Hole ±50ppm PDIP 4.5 V 5.5 V 8 13.21mm 13.21mm 5.08mm 13.21 x 13.21 x 5.08mm -40 °C