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    參數資料
    型號: PLL1700
    英文描述: MULTI-CLOCK GENERATOR
    中文描述: 多時鐘發(fā)生器
    文件頁數: 5/9頁
    文件大?。?/td> 137K
    代理商: PLL1700
    5
    PLL1700
    THEORY OF OPERATION
    MASTER CLOCK AND SYSTEM CLOCK OUTPUT
    The PLL1700 consists of a dual PLL clock and master clock
    generator which generates four system clocks and two buff-
    ered 27MHz clocks from a 27MHz master clock. Figure 1
    shows the block diagram of the PLL1700. The PLL is
    designed to accept a 27MHz master clock or crystal oscilla-
    tor. The master clock can be either a crystal oscillator placed
    between XT1 (pin 6) and XT2 (pin 5), or an external input
    to XT1. If an external master clock is used, XT2 should be
    connected to ground. Figure 2 illustrates possible system
    clock connection options, and Figure 3 illustrates the 27MHz
    master clock timing requirements.
    FIGURE 1. Block Diagram of PLL1700.
    FIGURE 2. Master Clock Generator Connection Diagram.
    FIGURE 3. External Master Clock Timing Requirement.
    t
    XT1H
    t
    XT1L
    2.0V
    XT1
    0.8V
    DESCRIPTION
    SYMBOL
    MIN
    TYP
    MAX
    UNITS
    System Clock Pulse Width HIGH
    System Clock Pulse Width LOW
    t
    XT1H
    t
    XT1L
    15
    15
    ns
    ns
    OSC
    Counter N
    Counter M
    Counter P
    Counter Q
    SCKO2
    256f
    S
    SCKO1
    33.8688MHz
    SCKO4
    768f
    S
    SCKO3
    384f
    S
    Data
    ROM
    Frequency Control
    PLL2
    PLL1
    Phase Detector
    and
    Loop Filter
    VCO
    VCO
    Counter M
    Counter N
    Phase Detector
    and
    Loop Filter
    MCKO
    27MHz
    MCKO
    XT2
    XT1
    C
    1
    C
    2
    C
    1
    , C
    2
    = 10pF to 33pF
    27MHz Internal
    Master Clock
    XTI
    XT2
    Crystal
    OSC
    Circuit
    Xtal
    PLL1700
    MCKO
    Buffer
    External Clock
    Crystal Resonator Connection
    MCKO
    Buffer
    Crystal
    OSC
    Circuit
    27MHz Internal
    Master Clock
    XT1
    XT2
    PLL1700
    MCKO
    Buffer
    External Clock Input
    MCKO
    Buffer
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    相關代理商/技術參數
    參數描述
    PLL1700E 功能描述:時鐘發(fā)生器及支持產品 3.3 V Dual PLL Multi Clock Gen RoHS:否 制造商:Silicon Labs 類型:Clock Generators 最大輸入頻率:14.318 MHz 最大輸出頻率:166 MHz 輸出端數量:16 占空比 - 最大:55 % 工作電源電壓:3.3 V 工作電源電流:1 mA 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:QFN-56
    PLL1700E/2K 功能描述:時鐘發(fā)生器及支持產品 Multi-Clock Gen RoHS:否 制造商:Silicon Labs 類型:Clock Generators 最大輸入頻率:14.318 MHz 最大輸出頻率:166 MHz 輸出端數量:16 占空比 - 最大:55 % 工作電源電壓:3.3 V 工作電源電流:1 mA 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:QFN-56
    PLL1700E/2KG4 功能描述:時鐘發(fā)生器及支持產品 Multi-Clock Gen RoHS:否 制造商:Silicon Labs 類型:Clock Generators 最大輸入頻率:14.318 MHz 最大輸出頻率:166 MHz 輸出端數量:16 占空比 - 最大:55 % 工作電源電壓:3.3 V 工作電源電流:1 mA 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:QFN-56
    PLL1700EG 功能描述:時鐘發(fā)生器及支持產品 Multi-Clock Gen RoHS:否 制造商:Silicon Labs 類型:Clock Generators 最大輸入頻率:14.318 MHz 最大輸出頻率:166 MHz 輸出端數量:16 占空比 - 最大:55 % 工作電源電壓:3.3 V 工作電源電流:1 mA 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:QFN-56
    PLL1700EG/2K 功能描述:時鐘發(fā)生器及支持產品 Multi-Clock Gen RoHS:否 制造商:Silicon Labs 類型:Clock Generators 最大輸入頻率:14.318 MHz 最大輸出頻率:166 MHz 輸出端數量:16 占空比 - 最大:55 % 工作電源電壓:3.3 V 工作電源電流:1 mA 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:QFN-56