Overview
Description
The 843004 is a 4 output LVPECL synthesizer optimized to generate Fibre Channel reference clock frequencies. Using a 26.5625MHz 18pF parallel resonant crystal, the following frequencies can be generated based on the 2 frequency select pins (F_SEL[1:0]): 212.5MHz, 187.5MHz, 159.375MHz, 156.25, 106.25MHz, and 53.125MHz. The 843004 uses our 3rd generation low phase noise VCO technology and can achieve 1ps or lower typical rms phase jitter, easily meeting Fibre Channel jitter requirements. The 843004 is packaged in a small 24-pin TSSOP package.
Features
- Four 3.3Vdifferential LVPECL output pairs
- Selectable crystal oscillator interface or LVCMOS/LVTTL single-ended clock input
- Supports the following output frequencies: 212.5MHz, 187.5MHz, 159.375MHz, 156.25MHz, 106.25MHz, 53.125MHz
- VCO range: 560MHz – 680MHz
- RMS phase jitter @ 212.5MHz, using a 26.5625MHz crystal (637kHz – 10MHz): 0.72ps (typical)
Offset Noise Power
100Hz ................ -95.0 dBc/Hz
1kHz .................. -114.3 dBc/Hz
10kHz ................ -123.8 dBc/Hz
100kHz .............. -124.6 dBc/Hz - Full 3.3V supply mode
- -30°C to 85°C ambient operating temperature
- Available in lead-free (RoHS 6) package
Comparison
Applications
Design & Development
Models
ECAD Models
Schematic symbols, PCB footprints, and 3D CAD models from SamacSys can be found by clicking on the CAD Model links in the Product Options table. If a symbol or model isn't available, it can be requested directly from SamacSys.
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