Overview
Description
The 844002-01 is a 2 output LVDS 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_SEL[1:0]): 156.25MHz, 125MHz and 62.5MHz. The 844002-01 uses IDT's 3rd generation low phase noise VCO technology and can achieve <1ps typical rms phase jitter, easily meeting Ethernet jitter requirements. The 844002-01 is packaged in a small 20-pin TSSOP package.
Features
- Two differential LVDS outputs
- Selectable crystal oscillator interface or single-ended LVCMOS/LVTTL input
- Supports the following output frequencies: 156.25MHz, 125MHz, 62.5MHz
- VCO range: 560MHz – 680MHz
- RMS phase jitter @ 156.25MHz, using a 25MHz crystal (1.875MHz – 20MHz): 0.41ps (typical)
- Full 3.3V and 2.5V supply modes
- 0°C to 70°C ambient operating temperature
- Available in lead-free (RoHS 6) package
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