GENERAL DESCRIPTION
The 843002-01 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 843002-
01 uses ICS’ 3rd generation low phase noise VCO technology
and can achieve 1ps or lower typical rms phase jitter, easily
meeting Ethernet jitter requirements. The 843002-01 is
packaged in a small 20-pin TSSOP package.

FEATURES
• Two 3.3V LVPECL outputs
• Selectable crystal oscillator interface
or LVCMOS single-ended input
• Supports the following input frequencies:
156.25MHz, 125MHz and 62.5MHz
• VCO range: 560MHz - 680MHz
• RMS phase jitter @ 156.25MHz, using a 25MHz crystal
(1.875MHz-20MHz): 0.54ps (typical)
• Typical phase noise at 156.25MHz
Phase noise:
Offset Noise Power
100Hz ................-97.3 dBc/Hz
1KHz ..............-119.1 dBc/Hz
10KHz ..............-126.4 dBc/Hz
100KHz ..............-127.6 dBc/Hz
• Full 3.3V supply mode
• Lead-Free package fully RoHS compliant
• -30°C to 85°C ambient operating temperature