特性
- 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
- -40°C to 85°C ambient operating temperature
- Available in lead-free (RoHS 6) package
描述
The 8430252I-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 frequencies can be generated: 156.25MHz LVPECL output and, 125MHz LVCMOS output. The 8430252I- 45 uses our third generation low phase noise VCO technology and can achieve 1ps or lower typical rms phase jitter, easily meeting Ethernet jitter requirements. The 8430252I-45 is packaged in a small 16-pin TSSOP package.