GENERAL DESCRIPTION
The 843004-01 is a 4 output LVPECL synthesizer optimized to
generate Ethernet reference clock frequencies and is a member
of the family of high performance clock solutions from IDT. Using
a 25MHz 18pF parallel resonant crystal, the following frequencies
can be generated based on the settings of 2 frequency select pins
(F_SEL[1:0]): 156.25MHz, 125MHz, 62.5MHz. The 843004-01
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 843004-01 is packaged in a small
24-pin TSSOP package.

FEATURES
• Four 3.3V 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): 0.57ps (typical)
• RMS phase noise at 156.25MHz (typical)
Phase noise:
Offset Noise Power
100Hz ................-95.5 dBc/Hz
1kHz .................-118 dBc/Hz
10kHz .................-126 dBc/Hz
100kHz ..............-126.6 dBc/Hz
• Full 3.3V supply mode
• -30°C to 85°C ambient operating temperature
• Available in lead-free RoHS compliant package