840004-01中文资料FemtoClock® Crystal-to-LVCMOS/LVTTL Frequency Synthesizer数据手册Renesas规格书

描述 Description

The 840004-01 is a 4 output LVCMOS/LVTTL Synthesizer optimized to generate Ethernet reference clock frequencies. Using a 25MHz, 18pF parallel resonant crystal, the following frequencies can be generated based on the 2 frequency select pins (F_SEL1:0): 156.25MHz, 125MHz, and 62.5MHz. The 840004-01 uses IDT's 3rd generation low phase noise VCO technology and can achieve 1ps or lower typical random rms phase jitter, easily meeting Ethernet jitter requirements. The 840004-01 is packaged in a small 20-pin TSSOP package.

特性 Features

·Four single-ended LVCMOS/LVTTL outputs 17Ω typical output impedance
·Selectable crystal oscillator interface or single-ended input
·Output frequency range: 56MHz - 175MHz
·VCO range: 560MHz - 700MHz
·RMS phase jitter at 156.25MHz (1.875MHz – 20MHz): 0.52ps (typical)Phase Noise:Offset ...........Noise Power100Hz ..........-94.9 dBc/Hz1kHz ............-119.6 dBc/Hz10kHz ..........-128.9 dBc/Hz100kHz ........-129.2 dBc/Hz
·Full 3.3V or mixed 3.3V core/2.5V output supply modes
·0°C to 70°C ambient operating temperature
·Available in lead-free (RoHS 6) package