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Home » NEWEST Products » New by Manufacturer » IDT (Integrated Device Technology) » 8T49N524I Programmable FemtoClock Clock Generator - IDT
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IDT IDT8T49N524I Programmable FemtoClock Clock Generator

IDT 8T49N524I Programmable FemtoClock
Clock Generator

IDT 8T49N524I Programmable FemtoClock Clock Generator offers an eight output programmable any-rate dual clock generator with selectable LVDS or LVPECL outputs. Both clock generators use Fractional Output Dividers to be able to generate output frequencies that are independent of each other and independent of the input frequency. Output frequencies for both clock generators are generated from a single crystal or reference clock. Clock Generator A supports three different factory-programmed default frequencies that can be selected from using only the FSEL control pins. Alternatively any desired output frequency can be programmed over the I2C serial port. The chosen output frequency is then driven out the QA0 to QA3 outputs. Clock Generator B supports a single factory-programmed default frequency. It can also be programmed for any output frequency via the serial port. The output frequency is driven out the QB0 to QB3 outputs. Excellent phase noise performance is achieved with IDT’s fourth Generation FemtoClock® NG PLL technology, which delivers sub-0.5ps RMS phase jitter in the integer divide mode.

  • Fourth Generation FemtoClock® NG PLL technology
  • Eight outputs selectable as LVPECL or LVDS
  • Input selectable: fundamental mode crystal or clock reference
  • Supports fundamental mode crystals from 10MHz-40MHz
  • CLK, nCLK input pair can accept the following differential input levels: LVPECL, LVDS, HCSL
  • Input frequencies from 5MHz up to 800MHz
  • Two independent output frequencies can be generated
  • Output frequencies independent of each other and of input

  • Output frequencies from 15.234MHz-645MHz, and 975MHz-1290MHz
  • RMS phase jitter at 125MHz (12kHz - 20MHz): 0.282ps (typical)
  • RMS phase jitter at 156.25MHz (12kHz - 20MHz): 0.278ps (typical)
  • Full 2.5V or 3.3V power supply
  • I2C programming interface
  • -40°C to 85°C ambient operating temperature
  • Lead-free (RoHS 6) packaging
Block Diagram
Block Diagram
  • Integrated Device Technology (IDT)