產品詳細資料

Number of outputs 4 Additive RMS jitter (typ) (fs) 50 Core supply voltage (V) 1.8, 2.5, 3.3 Output supply voltage (V) 1.8, 2.5, 3.3 Output skew (ps) 20 Operating temperature range (°C) -40 to 105 Rating Catalog Output type LVDS Input type HCSL, LP-HCSL, LVCMOS, LVDS, LVPECL
Number of outputs 4 Additive RMS jitter (typ) (fs) 50 Core supply voltage (V) 1.8, 2.5, 3.3 Output supply voltage (V) 1.8, 2.5, 3.3 Output skew (ps) 20 Operating temperature range (°C) -40 to 105 Rating Catalog Output type LVDS Input type HCSL, LP-HCSL, LVCMOS, LVDS, LVPECL
VQFN (RGT) 16 9 mm² 3 x 3
  • High-performance LVDS clock buffer family with 2 inputs and 4 (2:4) or 8 (2:8) outputs.
  • Output frequency up to 2 GHz.
  • Supply voltage: 1.71 V to 3.465 V
  • Low additive jitter: < maximum 60 fs RMS in 12-kHz to 20-MHz at 156.25 MHz
    • Very low phase noise floor: –164 dBc/Hz (typical)

  • Very low propagation delay: < 575 ps maximum

  • Output skew: 20 ps maximum

  • Universal inputs accept LVDS, LVPECL, LVCMOS, LP-HCSL, HCSL and CML inputs
  • LVDS reference voltage, V AC_REF, available for capacitive-coupled inputs
  • Industrial temperature range: –40°C to 105°C
  • Packages available:
    • LMK1D1204: 3-mm × 3-mm, 16-pin VQFN (RGT)

    • LMK1D1208: 5-mm × 5-mm, 28-pin VQFN (RHD)

  • High-performance LVDS clock buffer family with 2 inputs and 4 (2:4) or 8 (2:8) outputs.
  • Output frequency up to 2 GHz.
  • Supply voltage: 1.71 V to 3.465 V
  • Low additive jitter: < maximum 60 fs RMS in 12-kHz to 20-MHz at 156.25 MHz
    • Very low phase noise floor: –164 dBc/Hz (typical)

  • Very low propagation delay: < 575 ps maximum

  • Output skew: 20 ps maximum

  • Universal inputs accept LVDS, LVPECL, LVCMOS, LP-HCSL, HCSL and CML inputs
  • LVDS reference voltage, V AC_REF, available for capacitive-coupled inputs
  • Industrial temperature range: –40°C to 105°C
  • Packages available:
    • LMK1D1204: 3-mm × 3-mm, 16-pin VQFN (RGT)

    • LMK1D1208: 5-mm × 5-mm, 28-pin VQFN (RHD)

The LMK1D120x clock buffer distributes one of two selectable clock inputs (IN0 and IN1) to 4 or 8 pairs of differential LVDS clock outputs (OUT0 through OUT7) with minimum skew for clock distribution. The LMK1D12x family can accept two clock sources into an input multiplexer. The inputs can either be LVDS, LVPECL, LP-HCSL, HCSL, CML or LVCMOS.

The LMK1D12x is specifically designed for driving 50-Ω transmission lines. In case of driving the inputs in single-ended mode, the appropriate bias voltage as shown in must be applied to the unused negative input pin.

The IN_SEL pin selects the input which is routed to the outputs. If this pin is left open, it disables the outputs (logic low). The part supports a fail-safe function. The device further incorporates an input hysteresis which prevents random oscillation of the outputs in the absence of an input signal.

The device operates in 1.8-V or 2.5-V or 3.3-V supply environment and is characterized from –40°C to 105°C (ambient temperature). The LMK1D12x package variant is shown in the table below:

The LMK1D120x clock buffer distributes one of two selectable clock inputs (IN0 and IN1) to 4 or 8 pairs of differential LVDS clock outputs (OUT0 through OUT7) with minimum skew for clock distribution. The LMK1D12x family can accept two clock sources into an input multiplexer. The inputs can either be LVDS, LVPECL, LP-HCSL, HCSL, CML or LVCMOS.

The LMK1D12x is specifically designed for driving 50-Ω transmission lines. In case of driving the inputs in single-ended mode, the appropriate bias voltage as shown in must be applied to the unused negative input pin.

The IN_SEL pin selects the input which is routed to the outputs. If this pin is left open, it disables the outputs (logic low). The part supports a fail-safe function. The device further incorporates an input hysteresis which prevents random oscillation of the outputs in the absence of an input signal.

The device operates in 1.8-V or 2.5-V or 3.3-V supply environment and is characterized from –40°C to 105°C (ambient temperature). The LMK1D12x package variant is shown in the table below:

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* Data sheet LMK1D120x Low Additive Jitter LVDS Buffer datasheet (Rev. B) PDF | HTML 2023年 6月 14日
Application note Sine to Square Wave Conversion Using Clock Buffers PDF | HTML 2024年 9月 3日

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LMK1D1208EVM — 適用於低抖動 2:8 LVDS 扇出緩衝器的 LMK1D1208 評估模組

LMK1D1208 是具有兩個差分輸入和八個 LVDS 輸出的高性能、低附加抖動 LVDS 時鐘緩衝器。此評估模組 (EVM) 旨在示範 LMK1D1208 的電氣性能。此 EVM 還可以用於評估位於 LMK1Dxxxx 系列內的其他 28 針腳裝置。LMK1D1208EVM 配備 50-Ω SMA 連接器和阻抗控制的 50-Ω 微帶傳輸線,以提供最佳性能。
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