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. 703-2085
Mfr. Part No.ASV-7.3728MHz-EJ
BrandAbracon
R 12.80
Each (In a Bag of 10)
units
XO 7.3728MHz HCMOS, TTL ±20ppm Surface Mount SMD - - - - -20°C - 1.8mm 70°C
RS stock no. 667-6338
Mfr. Part No.Q33310F70003311
BrandEpson
R 57.98
Each
units
XO 24MHz CMOS ±100ppm Surface Mount SMD - - - - -40°C - 1.05mm 85°C
RS stock no. 173-2424
Mfr. Part No.Q33310F70003311
BrandEpson
R 21.382
Each (On a Reel of 250)
units
XO 24MHz CMOS ±100ppm Surface Mount SMD - - - - -40°C - 1.05mm 85°C
RS stock no. 146-3919
Mfr. Part No.LFSPXO018044 831018044
BrandIQD
R 13.761
Each (On a Reel of 1000)
units
Clock 50MHz HCMOS ±50ppm Surface Mount SMD - - - - 0°C - 1.4mm 70°C
RS stock no. 815-0370
Mfr. Part No.QTX733A7.37280B15R
R 36.66
Each
units
Clock 7.3728MHz HCMOS, TTL ±25ppm Surface Mount SMD - - - - -40°C - 1.4mm 85°C
RS stock no. 148-4318
Mfr. Part No.LFSPXO018044 831018044
BrandIQD
R 24.481
Each (In a Pack of 10)
units
Clock 50MHz HCMOS ±50ppm Surface Mount SMD - - - - 0°C - 1.4mm 70°C
RS stock no. 703-7113
Mfr. Part No.AS-12.000-18-SMD
BrandRALTRON
R 6.881
Each (In a Bag of 10)
units
- - - ±50ppm Surface Mount HC-49-US SMD - - - - -20°C - 4.6mm 70°C
RS stock no. 111-0721
Mfr. Part No.KC7050A4.19430C50D00
BrandKYOCERA
R 57.88
Each
units
Clock 4.1943MHz CMOS ±50ppm Surface Mount CSMD - - - - -10°C - 1.6mm 70°C
RS stock no. 146-3983
Mfr. Part No.LFSPXO018077 831018077
BrandIQD
R 13.76
Each (On a Reel of 1000)
units
Clock 25MHz HCMOS ±50ppm Surface Mount SMD - - - - 0°C - 1.4mm 70°C
RS stock no. 767-5336
Mfr. Part No.5H8ET-16.000
BrandMERCURY
R 38.95
Each
units
Clock 16MHz HCMOS, TTL ±50ppm Through Hole PDIP - - - - -40°C - 5.08mm 85°C
RS stock no. 148-5637
Mfr. Part No.LFSPXO018077 831018077
BrandIQD
R 23.034
Each (In a Pack of 10)
units
Clock 25MHz HCMOS ±50ppm Surface Mount SMD - - - - 0°C - 1.4mm 70°C
RS stock no. 173-5877
Mfr. Part No.QX14T50B16.00000B50TT
BrandQANTEK
R 29.05
Each (In a Tube of 25)
units
Clock 16MHz HCMOS ±50ppm Through Hole DIP14 - - - - -40°C - 5.08mm 85°C
RS stock no. 796-0514
Mfr. Part No.QX14T50B16.00000B50TT
BrandQANTEK
R 41.25
Each
units
XO 16MHz HCMOS ±50ppm Through Hole DIP14 - - - - -40°C - 5.08mm 85°C
RS stock no. 904-7673
Mfr. Part No.X1G004171003912
BrandEPSON
R 21.68
Each
units
XO 30MHz CMOS - Surface Mount - - - - - -40°C - 0.8mm +85°C, +105°C
RS stock no. 693-9153
Mfr. Part No.XO91050UITA-12.000
BrandEuroquartz
R 57.66
Each
units
XO 12MHz HCMOS, LSTTL ±50ppm Surface Mount SMD - - - - -40°C - 1.4mm 85°C
RS stock no. 173-5849
Mfr. Part No.XO91050UITA-12.000
BrandEuroquartz
R 19.622
Each (On a Reel of 1000)
units
XO 12MHz HCMOS, LSTTL ±50ppm Surface Mount SMD - - - - -40°C - 1.4mm 85°C
RS stock no. 767-5257
Mfr. Part No.5H14ET-8.000
BrandMERCURY
R 40.24
Each
units
Clock 8MHz HCMOS, TTL ±50ppm Through Hole PDIP - - - - -40°C - 5.08mm 85°C
RS stock no. 703-2414
Mfr. Part No.ASE3-25.000MHz-K
BrandAbracon
R 29.07
Each
units
Clock 25MHz CMOS ±30ppm Surface Mount SMD - - - - -10°C - 1.2mm 70°C
RS stock no. 671-9820
Mfr. Part No.S75005-16.000-X-15
BrandAKER
R 44.33
Each
units
Clock 16MHz HCMOS ±50ppm Surface Mount SMD - - - - -40°C - 1.3mm 85°C
RS stock no. 703-7129
Mfr. Part No.AS-16.000-18-SMD
BrandRALTRON
R 7.63
Each (In a Bag of 10)
units
- - - ±50ppm Surface Mount HC-49-US SMD - - - - -20°C - 4.6mm 70°C