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庫存編號 145-3853
製造零件編號NB3N502DG
TWD120.80
毎管:98 個
單位
- - - 190MHz Surface Mount 1 14MHz SOIC 20 mA 8 5 x 4 x 1.5mm 50MHz 1.5mm 5mm
RS庫存編號 787-6920
製造零件編號NB3N502DG
TWD142.00
/個 (每包:2個)
單位
- - - 190MHz Surface Mount 1 14MHz SOIC 20 mA 8 5 x 4 x 1.5mm 50MHz 1.5mm 5mm
RS庫存編號 787-6930
製造零件編號NB3N5573DTG
TWD172.00
單位
- - - 200MHz Surface Mount 2 25MHz TSSOP 135 mA 16 5.1 x 4.5 x 1.05mm 25MHz 1.05mm 5.1mm
RS庫存編號 170-3521
製造零件編號NB3N5573DTG
TWD145.80
毎管:96 個
單位
- - - 200MHz Surface Mount 2 25MHz TSSOP 135 mA 16 5.1 x 4.5 x 1.05mm 25MHz 1.05mm 5.1mm
RS庫存編號 162-9621
製造零件編號P3MS650103H-4CR
TWD29.60
個 (在毎卷:3000)
單位
- - - 60MHz Surface Mount 1 15MHz WDFN 9 mA 4 1 x 1.2 x 0.75mm 60MHz 0.75mm 1mm
RS庫存編號 802-2077
製造零件編號NBC12439AMNG
TWD391.00
單位
- - - 800MHz Surface Mount 1 400MHz QFN 85 mA 32 5 x 5 x 0.95mm 20MHz 0.95mm 5mm
RS庫存編號 161-2591
製造零件編號NB4N507ADG
TWD121.40
毎管:48 個
單位
- - - 200MHz Surface Mount 1 50MHz SOIC 35 mA 16 10 x 4 x 1.5mm 27MHz 1.5mm 10mm
RS庫存編號 802-2014
製造零件編號NB3N3020DTG
TWD299.00
單位
- - - 210MHz Surface Mount 1 - TSSOP 75 mA 16 5.1 x 4.5 x 1.05mm 210MHz 1.05mm 5.1mm
RS庫存編號 162-8970
製造零件編號NB3N3020DTG
TWD258.10
毎管:96 個
單位
- - - 210MHz Surface Mount 1 - TSSOP 75 mA 16 5.1 x 4.5 x 1.05mm 210MHz 1.05mm 5.1mm
RS庫存編號 145-4049
製造零件編號NB3N51032DTG
TWD121.10
毎管:96 個
單位
- - - 200MHz Surface Mount 2 25MHz TSSOP 100 mA 16 5.1 x 4.5 x 1.05mm 25MHz 1.05mm 5.1mm
RS庫存編號 787-7012
製造零件編號P3MS650103H-4CR
TWD35.40
/個 (每包:5個)
單位
- - - 60MHz Surface Mount 1 15MHz WDFN 9 mA 4 1 x 1.2 x 0.75mm 60MHz 0.75mm 1mm
RS庫存編號 145-5203
製造零件編號FS7140-02G-XTD
TWD223.10
毎管:76 個
單位
- - - 150 MHz, 300MHz Surface Mount 1 0MHz SSOP 35 mA 16 6.33 x 5.38 x 1.78mm 35MHz 1.78mm 6.33mm
RS庫存編號 145-2977
製造零件編號MC14046BDWG
TWD25.10
毎管:47 個
單位
- - - 0.7MHz Surface Mount - 0.5MHz SOIC ±1 μA 16 10.45 x 7.6 x 2.4mm - 2.4mm 10.45mm
RS庫存編號 145-3624
製造零件編號NBC12439AMNG
TWD344.20
毎管:74 個
單位
- - - 800MHz Surface Mount 1 400MHz QFN 85 mA 32 5 x 5 x 0.95mm 20MHz 0.95mm 5mm
RS庫存編號 163-2552
製造零件編號NB3N2302DG
TWD68.50
毎管:98 個
單位
- - - 133MHz Surface Mount 2 10MHz SOIC 50 mA 8 5 x 4 x 1.5mm 133MHz 1.5mm 5mm
RS庫存編號 186-9049
製造零件編號FS6377-01IG-XTD
TWD376.80
毎管:48 個
單位
- - - 150MHz Surface Mount 4 0.8MHz SOIC 43 mA 16 9.98 x 3.99 x 1.55mm 230MHz 1.55mm 9.98mm
RS庫存編號 801-0248
製造零件編號FS7140-02G-XTD
TWD261.50
/個 (每包:2個)
單位
- - - 150 MHz, 300MHz Surface Mount 1 0MHz SSOP 35 mA 16 6.33 x 5.38 x 1.78mm 35MHz 1.78mm 6.33mm
RS庫存編號 186-9936
製造零件編號FS6377-01IG-XTD
TWD427.00
單位
- - - 150MHz Surface Mount 4 0.8MHz SOIC 43 mA 16 9.98 x 3.99 x 1.55mm 230MHz 1.55mm 9.98mm
RS庫存編號 806-3179
製造零件編號MC14046BDWG
TWD30.00
/個 (每包:20個)
單位
- - - 0.7MHz Surface Mount - 0.5MHz SOIC ±1 μA 16 10.45 x 7.6 x 2.4mm - 2.4mm 10.45mm
RS庫存編號 827-0673
製造零件編號NB3N51032DTG
TWD142.50
/個 (每包:2個)
單位
- - - 200MHz Surface Mount 2 25MHz TSSOP 100 mA 16 5.1 x 4.5 x 1.05mm 25MHz 1.05mm 5.1mm