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IDT8R43002I-01 - LVPECL Frequencey Synthesizer

General Description

The IDT8R43002I-01 is a two output LVPECL synthesizer optimized to generate Ethernet reference clock frequencies.

Using a 25MHz 18pF parallel resonant crystal, the following frequencies can be generated based on the two frequency select pins (F_SEL[1:0]): 156.25MHz, 125MHz, and 62.5MHz.

Key Features

  • Two 3.3V or 2.5V LVPECL outputs.
  • Selectable crystal oscillator interface or LVCMOS/LVTTL single-ended input.
  • Supports the following output frequencies: 156.25MHz, 125MHz and 62.5MHz.
  • VCO range: 560MHz - 680MHz.
  • RMS phase jitter @ 156.25MHz, using a 25MHz crystal (1.875MHz-20MHz): 0.55ps (typical).
  • Output skew: 30ps (maximum).
  • Supply Voltage Modes Core/Outputs 3.3/3.3 2.5/2.5.
  • -40°C to 85°C ambient operating temperature.

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Full PDF Text Transcription (Reference)

The following content is an automatically extracted verbatim text from the original manufacturer datasheet and is provided for reference purposes only.

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FemtoClock® Crystal - to - 3.3 V, 2.5 LVPECL Frequencey Synthesizer IDT8R43002I-01 GENERAL DESCRIPTION The IDT8R43002I-01 is a two output LVPECL synthesizer optimized to generate Ethernet reference clock frequencies. Using a 25MHz 18pF parallel resonant crystal, the following frequencies can be generated based on the two frequency select pins (F_SEL[1:0]): 156.25MHz, 125MHz, and 62.5MHz. The IDT8R43002I-01 uses IDT’s FemtoClock® low phase noise VCO technology and can achieve 1ps or lower typical RMS phase jitter, easily meeting Ethernet jitter requirements. The IDT8R43002I-01 is packaged in a small 20-pin TSSOP package. DATA SHEET FEATURES • Two 3.3V or 2.