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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Omschrijving Prijs 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-stocknr. 178-9154
FabrikantnummerCD74HCT4046AM
0,398 €
Each (In a Tube of 40)
Aantal stuks
- - - - Surface Mount 1 - SOIC - 16 9.9 x 3.91 x 1.58mm - 1.58mm 9.9mm
RS-stocknr. 133-0680
FabrikantnummerLMX2581SQE/NOPB
5,84 €
Each
Aantal stuks
- - - 3760MHz Surface Mount 4 50MHz WQFN 134 mA 32 5 x 5 x 0.8mm 900MHz 0.8mm 5mm
RS-stocknr. 662-4595
FabrikantnummerCD74HCT4046AM
0,406 €
Each (In a Pack of 10)
Aantal stuks
- - - - Surface Mount 1 - SOIC - 16 9.9 x 3.91 x 1.58mm - 1.58mm 9.9mm
RS-stocknr. 168-5010
FabrikantnummerLMX2581SQE/NOPB
5,735 €
Each (On a Reel of 250)
Aantal stuks
- - - 3760MHz Surface Mount 4 50MHz WQFN 134 mA 32 5 x 5 x 0.8mm 900MHz 0.8mm 5mm
RS-stocknr. 809-6191
FabrikantnummerCD4046BPW
0,371 €
Each (In a Pack of 15)
Aantal stuks
- - - 1.6 MHz, 2.4 MHz Surface Mount 1 0.8 MHz, 1.4 MHz TSSOP 0.1 → 1 μA 16 5.1 x 4.5 x 1.05mm 1.4MHz 1.05mm 5.1mm
RS-stocknr. 923-6693
FabrikantnummerCD4046BE
0,413 €
Each (In a Tube of 25)
Aantal stuks
- - - - Through Hole 1 - PDIP - 16 19.3 x 6.35 x 4.57mm - 4.57mm 19.3mm
RS-stocknr. 162-6951
FabrikantnummerCD74HC4046AM96
0,191 €
Each (On a Reel of 2500)
Aantal stuks
- - - - Surface Mount 1 - SOIC - 16 9.9 x 3.91 x 1.58mm - 1.58mm 9.9mm
RS-stocknr. 662-3961
FabrikantnummerCD74HC4046AM96
0,406 €
Each (In a Pack of 10)
Aantal stuks
- - - - Surface Mount 1 - SOIC - 16 9.9 x 3.91 x 1.58mm - 1.58mm 9.9mm
RS-stocknr. 145-1118
FabrikantnummerCD4046BPW
0,363 €
Each (In a Tube of 90)
Aantal stuks
- - - 1.6 MHz, 2.4 MHz Surface Mount 1 0.8 MHz, 1.4 MHz TSSOP 0.1 → 1 μA 16 5.1 x 4.5 x 1.05mm 1.4MHz 1.05mm 5.1mm
RS-stocknr. 709-1965
FabrikantnummerCD4046BE
0,443 €
Each (In a Pack of 10)
Aantal stuks
- - - - Through Hole 1 - PDIP - 16 19.3 x 6.35 x 4.57mm - 4.57mm 19.3mm
RS-stocknr. 761-6438
FabrikantnummerLMX2485ESQ/NOPB
4,88 €
1 Tape of 1
Tape(s)
- - - 3000MHz Surface Mount 3 50MHz WQFN 5 mA 24 4 x 4 x 0.8mm 110 MHz, 800MHz 0.8mm 4mm
RS-stocknr. 809-5927
FabrikantnummerSN74LV4046AN
0,572 €
Each (In a Pack of 5)
Aantal stuks
- - - 38MHz Through Hole - - PDIP ±70 mA 16 19.69 x 6.6 x 4.57mm - 4.57mm 19.69mm
RS-stocknr. 145-0657
FabrikantnummerCD74HC4046AE
0,45 €
Each (In a Tube of 25)
Aantal stuks
- - - - Through Hole 1 - PDIP - 16 19.3 x 6.35 x 4.57mm - 4.57mm 19.3mm
RS-stocknr. 650-122
FabrikantnummerCD74HCT7046AE
2,41 €
Each
Aantal stuks
- - - - Through Hole 1 - PDIP - 16 19.3 x 6.35 x 4.57mm - 4.57mm 19.3mm
RS-stocknr. 162-8432
FabrikantnummerTRF3765IRHBT
9,265 €
Each (On a Reel of 250)
Aantal stuks
- - - 4800MHz Surface Mount - 300MHz VQFN 190 mA 32 5.15 x 5.15 x 0.95mm 350MHz 0.95mm 5.15mm
RS-stocknr. 162-4153
FabrikantnummerCD74HCT7046AE
2,053 €
Each (In a Tube of 25)
Aantal stuks
- - - - Through Hole 1 - PDIP - 16 19.3 x 6.35 x 4.57mm - 4.57mm 19.3mm
RS-stocknr. 817-5985
FabrikantnummerCDCM61002RHBT
5,59 €
Each
Aantal stuks
- - - 683.264MHz Surface Mount 2 43.75MHz VQFN 65 mA 32 5.15 x 5.15 x 0.95mm 28.47MHz 0.95mm 5.15mm
RS-stocknr. 709-2637
FabrikantnummerPLL1707DBQ
4,60 €
Each
Aantal stuks
- - - - Surface Mount 2 - SSOP 25 mA 20 8.75 x 4 x 1.5mm 27.27MHz 1.5mm 8.75mm
RS-stocknr. 620-2173
FabrikantnummerCDCVF25084PW
4,68 €
Each
Aantal stuks
- - - 180MHz Surface Mount 1 10MHz TSSOP - 16 5 x 4.4 x 1.15mm 45MHz 1.15mm 5mm
RS-stocknr. 634-192
FabrikantnummerCD74HCT297E
3,11 €
Each
Aantal stuks
- - - - Through Hole 1 - PDIP - 16 19.3 x 6.35 x 4.57mm - 4.57mm 19.3mm