GENERAL DESCRIPTION

The 844031I-01 is an Ethernet Clock Generator. The

844031I-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

844031I-01 has excellent <1ps phase jitter performance, over the

1.875MHz - 20MHz integration range. The 844031I-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

• 3.3V or 2.5V operating supply

• -40°C to 85°C ambient operating temperature

• Available in lead-free (RoHS 6) package

• For functional replacement use 8T49N242