Frequency Translator 40-Pin VFQFN T/R

The 849N202I is a highly flexible FemtoClock NG general purpose, low phase noise Universal Frequency Translator / Synthesizer with alarm and monitoring functions suitable for networking and communications applications. It is able to generate any output frequency in the 0.98MHz - 312.5MHz range and most output frequencies in the 312.5MHz - 1,300MHz range (see Table 3 for details). A wide range of input reference clocks and a range of low-cost fundamental mode crystal frequencies may be used as the source for the output frequency. The 849N202I has three operating modes to support a very broad spectrum of applications.

• 4TH generation FemtoClock® NG technology
• Universal Frequency Translator (UFT) / Frequency Synthesizer
• Two outputs, individually programmable as LVPECL or LVDS
  • Both outputs may be set to use 2.5V or 3.3V output levels
  • Programmable output frequency: 0.98MHz up to 1,300MHz
• Zero ppm frequency translation
• Two differential inputs support the following input types: LVPECL, LVDS, LVHSTL, HCSL
• Input frequency range: 8kHz - 710MHz
• Crystal input frequency range: 16MHz - 40MHz
• Two factory-set register configurations for power-up default state
  • Power-up default configuration pin or register selectable
  • Configurations customized via One-Time Programmable ROM
  • Settings may be overwritten after power-up via I2C
  • I2C Serial interface for register programming
• RMS phase jitter at 125MHz, using a 40MHz crystal (12kHz - 20MHz): 510fs (typical), Low Bandwidth Mode (FracN)
• RMS phase jitter at 400MHz, using a 40MHz crystal (12kHz - 40MHz): 321fs (typical), Synthesizer Mode (Integer FB)
• -40°C to 85°C ambient operating temperature
• Available in lead-free (RoHS 6) package