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ICS840021 - CRYSTAL-TO LVCMOS/LVTTL FREQUENCY SYNTHESIZER

General Description

The ICS840021 is a Gigabit Ethernet Clock Generator and a member of the HiPerClocksTM HiPerClockS™ family of high performance devices from ICS.

The ICS840021 uses a 25MHz crystal to synthesize 125MHz.

20MHz integration

Key Features

  • 1 LVCMOS/LVTTL output, 7Ω output impedence.
  • Crystal oscillator interface designed for 25MHz, 18pF parallel resonant crystal.
  • Output frequency: 125MHz.
  • VCO range: 560MHz to 680MHz.
  • RMS phase jitter @ 125MHz, using a 25MHz crystal (1.875MHz - 20MHz): 0.34ps (typical).
  • RMS phase noise at 125MHz (typical) Phase noise: Offset Noise Power 100Hz -96.9 dBc/Hz 1KHz -122.2 dBc/Hz 10KHz -131.1 dBc/Hz 100KHz -129.5 dBc/Hz.
  • 3.3V operating su.

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Datasheet Details

Part number ICS840021
Manufacturer Integrated Circuit Systems
File Size 240.15 KB
Description CRYSTAL-TO LVCMOS/LVTTL FREQUENCY SYNTHESIZER
Datasheet download datasheet ICS840021 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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Integrated Circuit Systems, Inc. ICS840021 FEMTOCLOCKS™ CRYSTAL-TOLVCMOS/LVTTL CLOCK GENERATOR FEATURES • 1 LVCMOS/LVTTL output, 7Ω output impedence • Crystal oscillator interface designed for 25MHz, 18pF parallel resonant crystal • Output frequency: 125MHz • VCO range: 560MHz to 680MHz • RMS phase jitter @ 125MHz, using a 25MHz crystal (1.875MHz - 20MHz): 0.34ps (typical) • RMS phase noise at 125MHz (typical) Phase noise: Offset Noise Power 100Hz ............... -96.9 dBc/Hz 1KHz .............. -122.2 dBc/Hz 10KHz .............. -131.1 dBc/Hz 100KHz .............. -129.5 dBc/Hz • 3.