GENERAL DESCRIPTION

T h e 8 4 3 0 0 2 I i s a 2 o u t p u t LV P E C L s y n t h e s i ze r

optimized to generate Fibre Channel reference

clock frequencies and is a member of thefamily of high

performance clock solutions from IDT. 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 843002I uses IDT’s FemtoClockTM low

phase noise VCO technology and can achieve 1ps or lower

typical rms phase jitter, easily meeting Fibre Channel jitter

requirements. The 843002I is packaged in a small 20-pin TSSOP

package.

FEATURES

• Two 3.3V or 2.5V LVPECL 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 @212.5MHz (2.55MHz - 20MHz):

0.50ps (typical)

• Full 3.3V or 2.5V supply modes

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

• Available in lead-free RoHS compliant package

• For functional replacement part use 8T49N242