Clock Synthesizers

A clock synthesizer is an electronic circuit that converts a single clock signal frequency into a range of output frequencies. Frequency values are given in MHz. Clock synthesizers can generate frequencies in multiples of the original, also known as a conversion rate. They can work in a phase-locked look, also known as a PLL.

Clock synthesizers are semiconductor devices which come in a standard package, such has a QFN, TSSOP or SOIC.

Where are Clock Synthesizersused used?

  • Wireless devices
  • RF devices
  • Radio
  • GPS
  • TV
  • Mobile phones

What is a PLL Synthesizer?

PLL synthesizers are analogue devices. A PLL circuit features a Voltage-Controlled Oscillator (VCO). The VCO output is constantly adjusted to match the phase and frequency of an input signal, using feedback from a Phase Comparator. A PLL circuit is often used to synchronise (lock) RF receiver circuits to an incoming carrier signal. If a frequency divider integer-n is introduced between the VCO output and the phase comparator, the PLL circuit output frequency will be fin/n, locked in phase to fin. If fin comes from a highly-stable fixed frequency oscillator and n is programmable, then the circuit forms the basis of an accurate Digital Frequency Synthesizer.

What is a Direct Digital Synthesizer?

Direct digital synthesizers (DDS) are digital devices. They are made up of a crystal oscillator, an NCO (numerically controlled oscillator) and a DAC (digital-to-analogue converter). DDS, in comparison to an analogue PLL synthesizer, offer improved phase noise and better control over the output where there are transitions between frequencies. They also offer better jitter performance.


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Description Price Category Conversion Rate Resolution Maximum Output Frequency Mounting Type Number of Elements per Chip Minimum Output Frequency Package Type Maximum Supply Current Pin Count Dimensions Maximum Input Frequency Height Length
RS Stock No. 162-9621
Mfr. Part No.P3MS650103H-4CR
HK$8.78
Each (On a Reel of 3000)
units
- - - 60MHz Surface Mount 1 15MHz WDFN 9 mA 4 1 x 1.2 x 0.75mm 60MHz 0.75mm 1mm
RS Stock No. 787-7012
Mfr. Part No.P3MS650103H-4CR
HK$9.546
Each (In a Pack of 5)
units
- - - 60MHz Surface Mount 1 15MHz WDFN 9 mA 4 1 x 1.2 x 0.75mm 60MHz 0.75mm 1mm
RS Stock No. 145-6056
Mfr. Part No.SN74LV4046AN
HK$11.896
Each (In a Tube of 25)
units
- - - 38MHz Through Hole - - PDIP ±70 mA 16 19.69 x 6.6 x 4.57mm - 4.57mm 19.69mm
RS Stock No. 809-5927
Mfr. Part No.SN74LV4046AN
HK$547.50
Each (In a Pack of 5)
units
- - - 38MHz Through Hole - - PDIP ±70 mA 16 19.69 x 6.6 x 4.57mm - 4.57mm 19.69mm
RS Stock No. 523-7162
Mfr. Part No.ADF4001BRUZ
HK$43.82
Each
units
- - - - Surface Mount 1 - CP 20 5.5 mA 16 5 x 4.4 x 1.05mm 200MHz 1.05mm 5mm
RS Stock No. 523-7516
Mfr. Part No.AD9831ASTZ
HK$131.77
Each
units
Digital Synthesizer 25000ksps 10 bit - Surface Mount - - LQFP - 48 7 x 7 x 1.4mm - 1.4mm 7mm
RS Stock No. 523-6383
Mfr. Part No.ADF4113BRUZ
HK$57.83
Each
units
- - - - Surface Mount 1 - CP 20 11 mA 16 5 x 4.4 x 1.05mm 4000MHz 1.05mm 5mm
RS Stock No. 923-6693
Mfr. Part No.CD4046BE
HK$4.893
Each (In a Tube of 25)
units
- - - - Through Hole 1 - PDIP - 16 19.3 x 6.35 x 4.57mm - 4.57mm 19.3mm
RS Stock No. 523-8222
Mfr. Part No.AD9830ASTZ
HK$251.10
Each
units
Digital Synthesizer 50Msps 10 bit - Surface Mount - - LQFP - 48 7 x 7 x 1.4mm - 1.4mm 7mm
RS Stock No. 709-1965
Mfr. Part No.CD4046BE
HK$4.893
Each (In a Pack of 10)
units
- - - - Through Hole 1 - PDIP - 16 19.3 x 6.35 x 4.57mm - 4.57mm 19.3mm
RS Stock No. 759-2749
Mfr. Part No.ADF4350BCPZ
HK$119.84
Each
units
- - - 4400MHz Surface Mount 2 137.5MHz LFCSP VQ 110 mA 32 5 x 5 x 1mm 4400MHz 1mm 5mm
RS Stock No. 160-3297
Mfr. Part No.HMC703LP4E
HK$235.149
Each (On a Reel of 50)
units
- - - - Surface Mount 1 - QFN 95 mA 24 4.1 x 4.1 x 0.95mm 8000MHz 0.95mm 4.1mm
RS Stock No. 802-2014
Mfr. Part No.NB3N3020DTG
HK$74.80
Each
units
- - - 210MHz Surface Mount 1 - TSSOP 75 mA 16 5.1 x 4.5 x 1.05mm 210MHz 1.05mm 5.1mm
RS Stock No. 162-8970
Mfr. Part No.NB3N3020DTG
HK$68.376
Each (In a Tube of 96)
units
- - - 210MHz Surface Mount 1 - TSSOP 75 mA 16 5.1 x 4.5 x 1.05mm 210MHz 1.05mm 5.1mm
RS Stock No. 662-3961
Mfr. Part No.CD74HC4046AM96
HK$4.883
Each (In a Pack of 10)
units
- - - - Surface Mount 1 - SOIC - 16 9.9 x 3.91 x 1.58mm - 1.58mm 9.9mm
RS Stock No. 909-3468
Mfr. Part No.HMC703LP4E
HK$279.25
Each
units
- - - - Surface Mount 1 - QFN 95 mA 24 4.1 x 4.1 x 0.95mm 8000MHz 0.95mm 4.1mm
RS Stock No. 162-6951
Mfr. Part No.CD74HC4046AM96
HK$2.142
Each (On a Reel of 2500)
units
- - - - Surface Mount 1 - SOIC - 16 9.9 x 3.91 x 1.58mm - 1.58mm 9.9mm
RS Stock No. 103-5689
Mfr. Part No.74HCT9046AD,112
BrandNexperia
HK$22.60
Each (In a Tube of 50)
units
- - - - Surface Mount 1 - SOIC - 16 10 x 4 x 1.45mm - 1.45mm 10mm
RS Stock No. 483-6774
Mfr. Part No.74HCT9046AD,112
BrandNexperia
HK$24.444
Each (In a Pack of 5)
units
- - - - Surface Mount 1 - SOIC - 16 10 x 4 x 1.45mm - 1.45mm 10mm
RS Stock No. 108-353
Mfr. Part No.ADF4252BCPZ
HK$57.20
Each
units
- - - - Surface Mount 2 - CP 24 16 mA 24 4 x 4 x 0.83mm 3000MHz 0.83mm 4mm