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Home » NEWEST Products » New by Manufacturer » IDT (Integrated Device Technology) » ICS841S10x PCI Express Clock Synthesizers - IDT
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IDT ICS841S10x PCI Express Clock Synthesizers

IDT ICS841S10x PCI Express Clock Synthesizers

IDT's ICS841S10x PCI Express Clock Synthesizers are a PLL-based clock synthesizer specifically designed for PCI_Express™ Clock applications. These devices generates a 100MHz differential HCSL clock from a input reference of 25MHz. The input reference may be derived from an external source or by the addition of a 25MHz crystal to the on-chip crystal oscillator. An external reference is applied to the XTAL_IN pin with the XTAL_OUT pin left floating. They offer spread spectrum clock output for reduced EMI applications. An I2C bus interface is used to enable or disable spread spectrum operation as well as select either a down spread value of -0.35% or -0.5%.

  • One, Two or Four 0.7V current mode differential HCSL output pairs
  • Crystal oscillator interface: 25MHz
  • Output frequency: 100MHz
  • RMS phase jitter @ 100MHz (12kHz – 20MHz): 1.23ps (typical)(ICS841S101 & ICS841S102)
  • 1.145ps (typical)(ICS841S104)
  • Cycle-to-cycle jitter: 20ps (maximum)

  • I2C support with readback capabilities up to 400kHz
  • Spread Spectrum for electromagnetic interference (EMI) reduction
  • 3.3V operating supply mode
  • -40°C to 85°C ambient operating temperature
  • Available in a lead-free (RoHS 6) package
  • PCI Express Gen 1, 2 and 3 jitter compliant
Block Diagrams
  • Integrated Device Technology (IDT)