GENERAL DESCRIPTION

The 844008I-01 is an 8 output LVDS Synthesizer optimized to

generate GbE/10GbE reference clock frequencies. Using a 25MHz

parallel resonant crystal, the following frequencies can be generated

based on the F_SEL pin: 125MHz or 156.25MHz. The 844008I-01

uses IDT’s 3rd generation low phase noise VCO technology and can

achieve <1ps typical rms phase jitter, easily meeting GbE/10GbE

jitter requirements. The 844

FEATURES

• Eight LVDS outputs

• Crystal oscillator interface

• Supports the following output frequencies:

125MHz or 156.25MHz

• VCO: 625MHz

• RMS phase jitter @ 156.25MHz, using a 25MHz crystal

(1.875MHz - 20MHz): 0.38ps (typical)

• Full 3.3V supply mode

• -40°C to 85°C ambient operating temperature

• Available in lead-free (RoHS 6) package