ルネサス エレクトロニクス株式会社 (Renesas Electronics Corporation)
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841654I

廃止品

FemtoClock Crystal-to-HCSL Clock Generator

841654I Datasheet

概要

The 841654I is an optimized PCIe and sRIO clock generator. The device uses a 25MHz parallel crystal to generate 100MHz and 125MHz clock signals, replacing solutions requiring multiple oscillator and fanout buffer solutions. The device has excellent phase jitter (< 1ps rms) suitable to clock components requiring precise and low-jitter PCIe or sRIO or both clock signals. Designed for telecom, networking and industrial applications, the 841654I can also drive the high-speed sRIO and PCIe SerDes clock inputs of communication processors, DSPs, switches and bridges.

841654I - Block Diagram
841654I - Pinout
841654I - Block Diagram
841654I - Pinout
  • Four differential HCSL clock outputs: configurable for PCIe (100MHz) and sRIO (100MHz or 125MHz) clock signals One REF_OUT LVCMOS/LVTTL clock output
  • Selectable crystal oscillator interface, 25MHz, 18pF parallel resonant crystal or LVCMOS/LVTTL single-ended reference clock input
  • Supports the following output frequencies:
    100MHz or 125MHz
  • VCO: 500MHz
  • PLL bypass and output enable
  • RMS phase jitter at 100MHz, using a 25MHz crystal (1.875MHz - 20MHz): 0.44ps (typical)
  • Full 3.3V power supply mode
  • -40°C to 85°C ambient operating temperature
  • Available in lead-free (RoHS 6) package

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設計・開発

ECADモデル

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