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843246I - Crystal-to-3.3V LVPECL Frequency Synthesizer W/Integrated Fanout Buffer

General Description

The 843246I is a Crystal-to-3.3V LVPECL Clock Synthesizer/Fanout Buffer designed for Fibre Channel and Gigabit Ethernet applications and is a member of the family of High Performance Clock Solutions from IDT.The output frequency can be set using the frequency select pins and a 25MHz crystal for Ethe

Key Features

  • Six LVPECL outputs.
  • Crystal oscillator interface.
  • VCO range: 490MHz to 680MHz.
  • Crystal input frequency range: 25MHz to 33.333MHz.
  • RMS phase jitter at 125MHz, using a 25MHz crystal (1.875MHz t.

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Datasheet Details

Part number 843246I
Manufacturer IDT
File Size 320.16 KB
Description Crystal-to-3.3V LVPECL Frequency Synthesizer W/Integrated Fanout Buffer
Datasheet download datasheet 843246I Datasheet

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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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Femtoclocks™ Crystal-to-3.3V LVPECL Frequency Synthesizer W/Integrated Fanout Buffer 843246I Data Sheet GENERAL DESCRIPTION The 843246I is a Crystal-to-3.3V LVPECL Clock Synthesizer/Fanout Buffer designed for Fibre Channel and Gigabit Ethernet applications and is a member of the family of High Performance Clock Solutions from IDT.The output frequency can be set using the frequency select pins and a 25MHz crystal for Ethernet frequencies, or a 26.5625MHz crystal for a Fibre Channel. The low phase noise characteristics of the 843246I make it an ideal clock for these demanding applications. SELECT FUNCTION TABLE Inputs FB_SEL N_SEL1 N_SEL0 00 0 00 1 01 0 01 1 10 0 10 1 11 0 11 1 Function M Divide N Divide 20 2 20 4 20 5 20 8 24 3 24 4 24 6 24 12 M/N 10 5 4 2.