General Description
The ICS843004I-156 is a four output LVPECL synthesizer optimized
to generate Ethernet reference clock frequencies. Using a 25MHz
18pF parallel resonant crystal, the ICS843004I-156 can generate
156.25MHz.
The ICS843004I-156 uses IDT’s 3RD generation low phase noise
VCO technology and can achieve 1ps or lower typical rms phase
jitter, easily meeting Ethernet jitter requirements. The
ICS843004I-156 is packaged in a small 24-pin TSSOP E-Pad
package.
Features
• Four 3.3V differential LVPECL output pairs
• Selectable crystal oscillator interface
or LVCMOS/LVTTL single-ended clock input
• 156.25MHz output frequency
• VCO range: 560MHz – 680MHz
• RMS phase jitter @ 156.25MHz, using a 25MHz crystal
(1.875MHz – 20MHz): 0.49ps (typical)
• Full 3.3V or 2.5V supply modes
• -40°C to 85°C ambient operating temperature
• Available in lead-free (RoHS 6) package