General Description
The 844004-104 is a 4 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 844004-104 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 844004-104 is packaged in a 32-pin VFQFN
package.

Features
• Four differential 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 at 212.5MHz (637kHz – 10MHz), using a
26.5625MHz crystal: <1ps (typical)
• Full 3.3V or 2.5V output supply modes
• 0°C to 70°C ambient operating temperature
• Available in lead-free (RoHS 6) packages