General Description
The 840004-11 is a 4 output LVCMOS/LVTTL 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, 125MHz and 62.5MHz can
be generated based on one frequency select pin (F_SEL). The
840004-11 uses IDT’s 3rd generation low phase noise VCO
technology and can achieve 1ps or lower typical random rms phase
jitter, easily meeting Ethernet jitter requirements. The 840004-11 is
packaged in a small 20-pin TSSOP package.

Features
• Four single-ended LVCMOS/LVTTL outputs
17 typical output impedance
• Crystal oscillator interface
• Input frequency range: 22.4MHz to 28MHz
• Output frequency range: 56MHz - 140MHz
• VCO range: 560MHz - 700MHz
• RMS phase jitter at 125MHz (1.875MHz – 20MHz):
0.70ps (typical)
Phase Noise:
Offset Noise Power
100Hz -95.5 dBc/Hz
1kHz -123.6 dBc/Hz
10kHz -132.8 dBc/Hz
100kHz -133.4 dBc/Hz
• Full 3.3V output supply mode
• 0°C to 70°C ambient operating temperature
• Available in lead-free (RoHS 6) package