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Renesas Electronics Corporation

Renesas’ Timing product portfolio has been acquired by SiTime.

Datasheets, documentation, and sample orders remain available on Renesas.com through late 2026. For new designs, purchasing, support, and product inquiries, visit SiTime.com or send an email to [email protected]. Full transition to SiTime is expected by late 2026.

Features

  • Universal Frequency Translator
    • Zero ppm frequency translation
  • Two outputs, individually programmable as LVPECL or LVDS
    • Individually programmable output frequencies: 7.68MHz up to 1200MHz
  • Two differential inputs support the following input types: LVPECL, LVDS, LVHSTL, HCSL
    • Input frequency range: 8kHz to 710MHz
  • Hitless switching between inputs
  • Holdover support in the event both inputs fail
  • One factory-set register configuration for power-up default state
  • RMS phase jitter at 125MHz, using a 40MHz crystal (12kHz to 20MHz):
    • 498fs (typical), Low Bandwidth mode (FracN)

Description

The 8T49N222I is a highly flexible FemtoClock® NG general-purpose, low-phase noise frequency translator/synthesizer with alarm and monitoring functions suitable for networking and communications applications. It can generate any output frequency in the 7.68MHz to 1200MHz range. 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.

To see other devices in this product family, visit the Universal Frequency Translators page.

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