GENERAL DESCRIPTION
The 844031-01 is an Ethernet Clock Generator. The 844031-01
uses an 18pF parallel resonant crystal over the range of 19.6MHz
- 27.2MHz. For Ethernet applications, a 25MHz crystal is used to
generate 312.5MHz. The 844031-01 has excellent <1ps phase jitter
performance, over the 1.875MHz - 20MHz integration range. The
844031-01 is packaged in a small 8-pin TSSOP, making it ideal for
use in systems with limited board space.

FEATURES
• One differential LVDS output
• Crystal oscillator interface, 18pF parallel resonant crystal
(19.6MHz - 27.2MHz)
• Output frequency range: 245MHz - 340MHz
• VCO range: 490MHz - 680MHz
• RMS phase jitter @ 312.5MHz, using a 25MHz crystal
(1.875MHz - 20MHz): 0.53ps (typical)
• 3.3V or 2.5V operating supply
• 0°C to 70°C ambient operating temperature
• Available in lead-free (RoHS 6) package
• For functional replacement part use 8T49N242