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843N252-45 Datasheet Lvpecl Frequency Synthesizer

Manufacturer: Renesas

Overview: FemtoClock® NG Crystal-to-3.3V LVPECL Frequency Synthesizer 843N252-45 Data Sheet.

General Description

The 843N252-45 is a 1 LVPECL and 1 LVCMOS output Synthesizer optimized to generate Ethernet reference clock frequencies.

The device uses IDT’s fourth generation FemtoClock ® NG technology for an optimum of high clock frequency and low phase noise performance, bined with a low power consumption and high power supply noise rejection.

Using a 25MHz parallel resonant crystal, the following frequencies can be generated: 156.25MHz and 125MHz.

Key Features

  • Fourth generation FemtoClock® Next Generation (NG) technology.
  • One differential 3.3V LVPECL output and one LVCMOS/LVTTL output.
  • Crystal oscillator interface designed for a 25MHz parallel resonant crystal.
  • A 25MHz crystal generates output frequencies of: 156.25MHz and 125MHz.
  • VCO frequency: 625MHz.
  • RMS Phase Jitter @ 156.25MHz, (12kHz.
  • 20MHz) using a 25MHz crystal: 0.33ps (typical).
  • RMS Phase Jitter @ 125MHz, (12kHz.

843N252-45 Distributor