General Description
The 843004I 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 two frequency select pins (F_SEL[1:0]):
212.5MHz, 187.5MHz, 159.375MHz, 156.25MHz, 106.25MHz, and
53.125MHz. The 843004I uses IDT’s 3rd generation low phase noise
VCO technology and can achieve 1ps or lower typical rms phase
jitter, easily meeting Fibre Channel jitter requirements. The 843004I
is packaged in a small 24-pin TSSOP package.

Features
• Four 3.3V differential 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
• Output skew: 50ps (maximum)
• RMS phase jitter @ 212.5MHz, using a 26.5625MHz crystal
(2.55MHz – 20MHz): 0.47ps (typical)
• Full 3.3V or 2.5V supply modes
• -40°C to 85°C ambient operating temperature
• Available in lead-free (RoHS 6) package