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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

  • Two LVDS output pairs
  • Using a 19.53125MHz or 25MHz crystal, the outputs can be set for 312.5MHz, 156.25MHz or 125MHz
  • Selectable crystal oscillator interface or LVCMOS/LVTTL single-ended input
  • VCO range: 490MHz - 680MHz
  • RMS phase jitter @ 156.25MHz, (1.875MHz - 20MHz): 0.37ps (typical)
  • Full 3.3V supply mode
  • -40°C to 85°C ambient operating temperature
  • Available in lead-free (RoHS 6) package

Description

The 844003EI-01 is a 2 differential output LVDS synthesizer designed to generate Ethernet reference clock frequencies. Using a 19.53125MHz or 25MHz, 18pF parallel resonant crystal, the following frequencies can be generated based on the settings of 2 frequency select pins DIV_SEL[1:0]): 312.5MHz, 156.25MHz, and 125MHz. The 844003EI-01 is packaged in a small 24-pin TSSOP package.

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