GENERAL DESCRIPTION
The 8430252-45 is a 2 output LVPECL and LVCMOS/LVTTL
Synthesizer optimized to generate Ethernet reference clock
frequencies . Using a 25MHz, 18pF parallel resonant crystal, the
following fre-quencies can be generated: 156.25MHz LVPECL
output and, 125MHz LVCMOS output. The 8430252-45 uses IDT’s
3rd generation low phase noise VCO technology and can achieve
1ps or lower typical rms phase jitter, easily meeting Ethernet jitter
requirements. The 8430252-45 is packaged in a small 16-pin
TSSOP package.

FEATURES
• One differential 3.3V LVPECL output and
One LVCMOS/LVTTL output
• Crystal oscillator interface designed for a 25MHz,
18pF parallel resonant crystal
• A 25MHz crystal generates both an output frequency of
156.25MHz (LVPECL) and 125MHz (LVCMOS)
• VCO frequency: 625MHz
• RMS phase jitter @ 156.25MHz (1.875MHz - 20MHz) using a
25MHz crystal: 0.39ps (typical)
• Full 3.3V supply mode
• 0°C to 70°C ambient operating temperature
• Available in lead-free (RoHS 6) package