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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

  • One Differential LVDS output
  • Crystal oscillator interface, 18pF parallel resonant crystal (24.5MHz – 34MHz)
  • Output frequency range: 122.5MHz – 170MHz
  • VCO range: 490MHz – 680MHz
  • RMS phase jitter @ 125MHz, using a 25MHz crystal (1.875MHz – 20MHz): 0.32ps (typical) @ 3.3V
  • 3.3V or 2.5V operating supply
  • -40°C to 85°C ambient operating temperature
  • Available in lead-free (RoHS 6) package

Description

The 844021I-01 is an Ethernet clock generator that uses an 18pF parallel resonant crystal over the range of 24.5MHz – 34MHz. For Ethernet applications, a 25MHz crystal is used. The 844021I-01 has excellent <1ps phase jitter performance, over the 1.875MHz – 20MHz integration range. The 844021I-01 is packaged in a small 8-pin TSSOP, making it ideal for use in systems with limited board space.

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