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    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.

    101 產品顯示為 Clock Synthesizers

    • RS庫存編號 262-9022P
    • 製造零件編號 9FGV0231AKILF
    个 (以每盘装提供)
    HK$23.70
    Renesas Electronics
    -
    -
    -
    -
    -
    -
    -
    VFQFPN
    -
    24
    -
    -
    -
    -
    -
    -
    -
    -
    • RS庫存編號 254-4951P
    • 製造零件編號 5V41236PGG
    个 (以每管裝提供)
    HK$31.55
    Renesas Electronics
    Digital Synthesizer
    -
    -
    200MHz
    Surface Mount
    -
    -
    TSSOP
    -
    20
    -
    -
    -
    -
    3.465 V
    -
    -
    -
    • RS庫存編號 254-4949P
    • 製造零件編號 5V41066PGG
    个 (以每管裝提供)
    HK$31.55
    Renesas Electronics
    Digital Synthesizer
    -
    -
    200MHz
    Surface Mount
    -
    -
    TSSOP
    -
    20
    -
    -
    -
    -
    3.465 V
    -
    -
    -
    • RS庫存編號 802-2077P
    • 製造零件編號 NBC12439AMNG
    个 (以每管裝提供)
    HK$114.90
    onsemi
    -
    -
    -
    800MHz
    Surface Mount
    1
    400MHz
    QFN
    85 mA
    32
    5 x 5 x 0.95mm
    20MHz
    0.95mm
    5mm
    5.25 V
    +85 °C
    3.135 V
    -40 °C
    • RS庫存編號 216-6267P
    • 製造零件編號 9FG104EGILFT
    个 (以每卷裝提供)
    HK$57.00
    Renesas Electronics
    -
    -
    -
    -
    -
    -
    -
    TSSOP
    109 mA
    28
    -
    400MHz
    -
    -
    -
    -
    -
    -
    • RS庫存編號 827-0673P
    • 製造零件編號 NB3N51032DTG
    个 (以每管裝提供)
    HK$32.10
    onsemi
    -
    -
    -
    -
    -
    -
    -
    -
    -
    -
    -
    -
    -
    -
    -
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    • RS庫存編號 217-7875P
    • 製造零件編號 5V41066PGGI
    个 (以每管裝提供)
    HK$24.46
    Renesas Electronics
    Digital Synthesiser
    -
    -
    200MHz
    Surface Mount
    4
    -
    TSSOP
    -
    20
    -
    -
    -
    -
    -
    -
    -
    -
    • RS庫存編號 263-7976P
    • 製造零件編號 841S104EGILF
    个 (以每管裝提供)
    HK$143.80
    Renesas Electronics
    Crystal Oscillator
    -
    -
    100MHz
    Surface Mount
    5
    -
    TSSOP
    -
    16
    -
    -
    -
    -
    3.3 V
    -
    -
    -
    • RS庫存編號 662-4586P
    • 製造零件編號 CD74HC7046AM
    个 (以每管裝提供)
    HK$23.36
    Texas Instruments
    -
    -
    -
    -
    Surface Mount
    1
    -
    SOIC
    -
    16
    9.9 x 3.91 x 1.58mm
    -
    1.58mm
    9.9mm
    6 V
    +125 °C
    2 V
    -55 °C
    • RS庫存編號 262-8959P
    • 製造零件編號 5P49EE502NDGI
    个 (以每盘装提供)
    HK$23.60
    Renesas Electronics
    -
    -
    -
    120MHz
    -
    -
    -
    VFQFPN
    -
    20
    -
    -
    -
    -
    4.6 V
    -
    -
    -
    • RS庫存編號 254-4953P
    • 製造零件編號 6V49205BPAGI
    个 (以每管裝提供)
    HK$47.00
    Renesas Electronics
    -
    -
    -
    125MHz
    Surface Mount
    -
    -
    TSSOP
    -
    48
    -
    -
    -
    -
    4.6 V
    -
    -
    -
    • RS庫存編號 787-6930P
    • 製造零件編號 NB3N5573DTG
    个 (以每管裝提供)
    HK$34.10
    onsemi
    -
    -
    -
    200MHz
    Surface Mount
    2
    25MHz
    TSSOP
    135 mA
    16
    5.1 x 4.5 x 1.05mm
    25MHz
    1.05mm
    5.1mm
    3.63 V
    +85 °C
    2.97 V
    -40 °C
    • RS庫存編號 662-4589P
    • 製造零件編號 CD74HC4046AE
    个 (以每管裝提供)
    HK$5.02
    Texas Instruments
    -
    -
    -
    -
    Through Hole
    1
    -
    PDIP
    -
    16
    19.3 x 6.35 x 4.57mm
    -
    4.57mm
    19.3mm
    6 V
    +125 °C
    2 V
    -55 °C
    • RS庫存編號 263-7902P
    • 製造零件編號 5V41235PGGI
    个 (以每管裝提供)
    HK$32.00
    Renesas Electronics
    Crystal Oscillator
    -
    -
    100MHz
    Surface Mount
    5
    -
    TSSOP
    -
    16
    -
    -
    -
    -
    3.3 V
    -
    -
    -
    • RS庫存編號 241-2964P
    • 製造零件編號 AB-557-03-HCHC-F-L-C-T
    个 (以每卷裝提供)
    HK$42.35
    Abracon
    -
    -
    -
    460MHz
    Surface Mount
    1
    -
    TSSOP-16
    -
    14
    -
    -
    -
    -
    3.6 V
    -
    -
    -
    • RS庫存編號 817-5994P
    • 製造零件編號 CDCM61004RHBT
    个 (以每卷裝提供)
    HK$80.60
    Texas Instruments
    -
    -
    -
    683.264MHz
    Surface Mount
    4
    43.75MHz
    VQFN
    65 mA
    32
    5.15 x 5.15 x 0.95mm
    28.47MHz
    0.95mm
    5.15mm
    3.6 V
    +85 °C
    3 V
    -40 °C
    • RS庫存編號 230-6594P
    • 製造零件編號 RC32504A000GNK#BB0
    个 (以每盘装提供)
    HK$116.70
    Renesas Electronics
    -
    20Gsps
    -
    180MHz
    Surface Mount
    8
    -
    24-QFN
    -
    24
    -
    -
    -
    -
    -
    -
    -
    -
    • RS庫存編號 761-6438P
    • 製造零件編號 LMX2485ESQ/NOPB
    个 (以每卷裝提供)
    HK$58.59
    Texas Instruments
    -
    -
    -
    3000MHz
    Surface Mount
    3
    50MHz
    WQFN
    5 mA
    24
    4 x 4 x 0.8mm
    110 MHz, 800MHz
    0.8mm
    4mm
    3.6 V
    +150 °C
    2.5 V
    -65 °C
    • RS庫存編號 230-6592P
    • 製造零件編號 RC22504A000GNK#BB0
    个 (以每盘装提供)
    HK$96.00
    Renesas Electronics
    -
    20Gsps
    -
    180MHz
    Surface Mount
    6
    -
    24-QFN
    -
    24
    -
    -
    -
    -
    -
    -
    -
    -
    • RS庫存編號 125-6941P
    • 製造零件編號 CY22150KFZXC
    个 (以每管裝提供)
    HK$90.55
    Infineon
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