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SY87739L - Fractional-N Synthesizer

General Description

The SY87739L is a complete rate independent frequency synthesizer integrated circuit.

The SY87739L generates an exactly correct reference frequency for common data transport protocols.

Key Features

  • Protocol transparent fractional-N synthesizer from 10MHz to 729MHz from a single 27MHz reference oscillator.
  • Generates exactly the correct frequency for common transport protocols with or without FEC.
  • Directly enables SY87721L CDR to lock onto any data rate within its range.
  • Exceeds BellCore and ITU jitter generation specifications.
  • Programmable via MicroWire™ interface.
  • Available in 32-Pin ePad-TQFP package.

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Datasheet Details

Part number SY87739L
Manufacturer Micrel Semiconductor
File Size 353.79 KB
Description Fractional-N Synthesizer
Datasheet download datasheet SY87739L 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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SY87739L Protocol Transparent, 3.3V, 10MHz to 729MHz, Fractional-N Synthesizer General Description The SY87739L is a complete rate independent frequency synthesizer integrated circuit. From a single reference source, this device generates a differential PECL output frequency from 10MHz up to 729MHz The SY87739L generates an exactly correct reference frequency for common data transport protocols. This is especially important in transponder applications, where a standards compliant protocol data unit must be generated downstream, even in the absence of any signal from the associated upstream interface. In addition, the SY87739L will generate exactly correct reference frequencies for common data transport protocols augmented by forward error correction codes.