概览
描述
The 843004-01 is a 4 output LVPECL synthesizer optimized to generate Ethernet reference clock frequencies. Using a 25MHz 18pF parallel resonant crystal, the following frequencies can be generated based on the settings of 2 frequency select pins (F_SEL[1:0]): 156.25MHz, 125MHz, 62.5MHz. The 843004-01 uses our 3rd generation low phase noise VCO technology and can achieve 1ps or lower typical rms phase jitter, easily meeting Ethernet jitter requirements. The 843004-01 is packaged in a small 24-pin TSSOP package.
特性
- Four 3.3V LVPECL outputs
- Selectable crystal oscillator interface or LVCMOS/LVTTL single-ended input
- Supports the following output frequencies: 156.25MHz, 125MHz and 62.5MHz
- VCO range: 560MHz - 680MHz
- RMS phase jitter @ 156.25MHz, using a 25MHz crystal (1.875MHz - 20MHz): 0.57ps (typical)
- RMS phase noise at 156.25MHz (typical)
Phase noise:
Offset Noise Power
100Hz ................ -95.5 dBc/Hz
1kHz .................. -118 dBc/Hz
10kHz ................ -126 dBc/Hz
100kHz .............. -126.6 dBc/Hz - Full 3.3V supply mode
- -30°C to 85°C ambient operating temperature
- Available in lead-free RoHS compliant package
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