GENERAL DESCRIPTION

The 843031 is a 1 Gigabit Ethernet Clock Generator. The

843031 can synthesize 1 Gigabit Ethernet, SONET, or Serial

ATA reference clock frequencies with the appropriate choice of

crystal and output divider. The 843031 has excellent phase jitter

performance and is packaged in a small 8-pin TSSOP, making

it ideal for use in systems with limited board space.

FEATURES

• One differential 3.3V LVPECL output

• Crystal oscillator interface designed for 18pF parallel resonant

crystals

• Output frequency range: 290MHz - 350MHz

• VCO frequency range: 580MHz - 700MHz

• RMS phase jitter @312.5MHz (1.875MHz - 20MHz):

0.475ps (typical)

RMS phase jitter @318.75MHz (1.875MHz - 20MHz):

0.475ps (typical)

• 3.3V operating supply

• 0°C to 70°C ambient operating temperature

• Available in lead-free (RoHS 6) package

• For functional replacement part use 843031i-01