概览
描述
The 840004-11 is a 4 output LVCMOS/LVTTL synthesizer optimized to generate Ethernet reference clock frequencies. 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 our 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.
特性
- Four single-ended LVCMOS/LVTTL outputs 17Ω 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
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应用
设计和开发
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