843N252-45 - NG Crystal-to-3.3V LVPECL Frequency Synthesizer

IDT

General Description

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

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.

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843N252-45 ng crystal-to-3.3v lvpecl frequency synthesizer by IDT - Datasheet Preview

Datasheet Details

Part number	843N252-45
Manufacturer	IDT
File Size	286.33 KB
Description	NG Crystal-to-3.3V LVPECL Frequency Synthesizer
Datasheet	843N252-45 Datasheet

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Full PDF Text Transcription (Reference)

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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, combined 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. With a very low phase noise VCO it is targeted to achieve 0.4ps or lower typical rms phase jitter, easily meeting Ethernet jitter requirements. The 843N252-45 is packaged in a small 16-pin TSSOP package.