GENERAL DESCRIPTION

The 843002I-01 is a 2 output LVPECL 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 843002I-01 uses

IDT’s FemtoClock® low phase noise VCO technology and can

achieve 1ps or lower typical rms phase jitter, easily meeting

Ethernetjitter requirements. The 843002I-01 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:

156.25MHz, 125MHz and 62.5MHz

• VCO range: 560MHz - 680MHz

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

(1.875MHz-20MHz): 0.55ps (typical)

• Output skew: 30ps (maximum)

• Supply Voltage Modes

Core/Outputs

3.3/3.3

2.5/2.5

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

• Available in lead-free RoHS-compliant package