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      參數(shù)資料
      型號(hào): SI5351B-A-GM
      廠商: Silicon Laboratories Inc
      文件頁數(shù): 26/72頁
      文件大?。?/td> 0K
      描述: IC CLK GEN PLL BLANK CUST 20-QFN
      標(biāo)準(zhǔn)包裝: 75
      系列: MultiSynth™
      類型: *
      PLL:
      輸入: 晶體
      輸出: CMOS
      電路數(shù): 1
      比率 - 輸入:輸出: 1:8
      差分 - 輸入:輸出: 無/無
      頻率 - 最大: 133MHz
      除法器/乘法器: 是/無
      電源電壓: 2.25 V ~ 3.63 V
      工作溫度: -40°C ~ 85°C
      安裝類型: 表面貼裝
      封裝/外殼: 20-VFQFN 裸露焊盤
      供應(yīng)商設(shè)備封裝: 20-QFN(4x4)
      包裝: 管件
      Si5351A/B/C
      32
      Preliminary Rev. 0.95
      Reset value = 0000 0000
      Register 18. CLK2 Control
      Bit
      D7D6D5D4D3D2D1D0
      Name
      CLK2_PDN
      MS2_INT
      MS2_SRC
      CLK2_INV
      CLK2_SRC[1:0]
      CLK2_IDRV[1:0]
      Type
      R/W
      Bit
      Name
      Function
      7
      CLK2_PDN
      Clock 2 Power Down.
      This bit allows powering down the CLK2 output driver to conserve power when the out-
      put is unused.
      0: CLK2 is powered up.
      1: CLK2 is powered down.
      6MS2_INT
      MultiSynth 2 Integer Mode.
      This bit can be used to force MS2 into Integer mode to improve jitter performance. Note
      that the fractional mode is necessary when a delay offset is specified for CLK2.
      0: MS2 operates in fractional division mode.
      1: MS2 operates in integer mode.
      5MS2_SRC
      MultiSynth Source Select for CLK2.
      0: Select PLLA as the source for MultiSynth0.
      1: Select PLLB (Si5351A/C only) or VCXO (Si5351B only) MultiSynth0.
      4
      CLK2_INV
      Output Clock 2 Invert.
      0: Output Clock 2 is not inverted.
      1: Output Clock 2 is inverted.
      3:2
      CLK2_SRC[1:0] Output Clock 2 Input Source.
      These bits determine the input source for CLK2.
      00: Select the XTAL as the clock source for CLK2. This option by-passes both synthesis
      stages (PLL/VCXO & MultiSynth) and connects CLK2 directly to the oscillator which gen-
      erates an output frequency determined by the XTAL frequency.
      01: Select CLKIN as the clock source for CLK2. This by-passes both synthesis stages
      (PLL/VCXO & MultiSynth) and connects CLK2 directly to the CLKIN input. This essen-
      tially creates a buffered output of the CLKIN input.
      10: Reserved. Do not select this option.
      11: Select MultiSynth 0 as the source for CLK2. Select this option when using the Si5351
      to generate free-running or synchronous clocks.
      1:0
      CLK2_IDRV[1:0] CLK2 Output Rise and Fall time / Drive Strength Control.
      00: 2 mA
      01: 4 mA
      10: 6 mA
      11: 8 mA
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