General Description
The 844002I-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
844002I-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 844002I-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 2.5V supply mode
• -40°C to 85°C ambient operating temperature
• Available in lead-free (RoHS 6) package