8430252I-45中文资料FemtoClock® Crystal-to-3.3V LVPECL Frequency Synthesizer数据手册Renesas规格书

描述 Description

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 fre-quencies can be generated: 156.25MHz LVPECL output and, 125MHz LVCMOS output. The 8430252I- 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 8430252I-45 is packaged in a small 16-pin TSSOP package.

特性 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
·-40°C to 85°C ambient operating temperature
·Available in lead-free (RoHS 6) package