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ICS845204 Datasheet CLOCK SYNTHESIZER W/SPREAD SPECTRUM

Manufacturer: Renesas

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General Description

The ICS845204 is a 4 output PCI Express clock ICS synthesizer optimized to generate low jitter PCI HiPerClockS™ Express™ reference clocks with or without spread spectrum modulation and is a member of the HiPerClockS™ family of high performance clock solutions from IDT.

Spread type and amount can be configured via the SSC control pins.

Using a 25MHz, 18pF parallel resonant crystal, the device will generate M-LVDS clocks at either 25MHz, 100MHz, 125MHz or 250MHz.

Overview

ADVANCE INFORMATION CRYSTAL-TO-MLVDS PCI EXPRESS™ CLOCK SYNTHESIZER W/SPREAD SPECTRUM ICS845204.

Key Features

  • Four differential spread spectrum clock outputs.
  • Each output can be individually disabled by separate output-enable inputs.
  • Crystal oscillator interface designed for 18pF, 25MHz parallel resonant crystal.
  • Supports the following output frequencies: 25MHz, 100MHz, 125MHz or 250MHz.
  • VCO range: 250MHz - 700MHz.
  • Supports SSC downspread at 0.05% and -0.75%, centerspread at ±0.25% and no spread options.
  • Cycle-to-cycle jitter: 50ps (maximum.

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