GENERAL DESCRIPTION
The 844002 is a 2 output LVDS 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, 106.25MHz and 53.125MHz.
The 844002 uses IDT’s 3rd generation low phase noise VCO
technology and can achieve <1ps typical rms phase jitter, easily
meeting Fibre Channel jitter requirements. The 844002 is packaged
in a small 20-pin TSSOP package.

FEATURES
• Two LVDS outputs
• Selectable crystal oscillator interface
or LVCMOS/LVTTL single-ended input
• Supports the following output frequencies: 212.5MHz,
187.5MHz, 159.375MHz, 106.25MHz and 53.125MHz
• VCO range: 560MHz - 680MHz
• RMS phase jitter @ 212.5MHz, using a 26.5625MHz crystal
(637kHz - 10MHz): 0.65ps (typical)
• Full 3.3V or 2.5V supply modes
• 0°C to 70°C ambient operating temperature
• Available in lead-free (RoHS 6) package