GENERAL DESCRIPTION

The 844008I-15 is an 8 output LVDS Synthesizer optimized to

generate PCI Express™ reference clock frequencies and is a

member of the high performance clock solutions from IDT. Using a

25MHz parallel resonant crystal, the following frequencies can be

generated based on F_SEL pin: 100MHz or 125MHz. The 844008I15 uses IDT’s 3rd generation low phase noise VCO technology

and can achieve <1ps typical rms phase jitter, easily meeting PCI

Express jitter requirements. The 844008I-15 is packaged in a 32-

pin LQFP package.

FEATURES

• Eight LVDS outputs

• Crystal oscillator interface

• Supports the following output frequencies:

100MHz or 125MHz

• VCO: 500MHz

• RMS phase jitter @ 125MHz, using a 25MHz crystal

(1.875MHz - 20MHz): 0.42ps (typical)

• Full 3.3V supply modes

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

• Available in lead-free (RoHS 6) package