特長
- Four single-ended LVCMOS/LVTTL outputs 17Ω typical output impedance
- Selectable crystal oscillator interface or single-ended input
- Output frequency range: 56MHz - 175MHz
- VCO range: 560MHz - 700MHz
- RMS phase jitter at 156.25MHz (1.875MHz – 20MHz): 0.52ps (typical)
Phase Noise:
Offset ...........Noise Power
100Hz ..........-94.9 dBc/Hz
1kHz ............-119.6 dBc/Hz
10kHz ..........-128.9 dBc/Hz
100kHz ........-129.2 dBc/Hz - Full 3.3V or mixed 3.3V core/2.5V output supply modes
- 0°C to 70°C ambient operating temperature
- Available in lead-free (RoHS 6) package
840004-01 - Block Diagram
説明
The 840004-01 is a 4 output LVCMOS/LVTTL 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_SEL1:0): 156.25MHz, 125MHz, and 62.5MHz. The 840004-01 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 840004-01 is packaged in a small 20-pin TSSOP package.
