特長
- Dual differential 3.3V LVPECL outputs
- Selectable crystal oscillator interface or LVCMOS/LVTTL TEST_CLK
- Output frequency range: 77.5MHz to 780MHz
- Crystal input frequency range: 14MHz to 40MHz
- VCO range: 620MHz to 780MHz
- Parallel or serial interface for programming counter and output dividers
- Duty cycle: 49% - 51% (N > 1)
- RMS period jitter: 2ps (typical)
- RMS phase jitter at 155.52MHz, using a 38.88MHz crystal (12kHz to 20MHz): 2.5ps (typical)
Offset Noise Power
100Hz ................. -90.5 dBc/Hz
1kHz ............... -114.2 dBc/Hz
10kHz ............... -123.6 dBc/Hz
100kHz ............... -128.1 dBc/Hz - 3.3V supply voltage
- 0°C to 70°C ambient operating temperature
- Available in lead-free RoHS (6) package
84320-01 - Block Diagram
説明
The 84320-01 is a general purpose, dual output Crystal-to-3.3V Differential LVPECL High Frequency Synthesizer. The 84320-01 has a selectable TEST_CLK or crystal inputs. The VCO operates at a frequency range of 620MHz to 780MHz. The VCO frequency is programmed in steps equal to the value of the input reference or crystal frequency. The VCO and output frequency can be programmed using the serial or parallel interfaces to the configuration logic. The low phase noise characteristics of the 84320-01 make it an ideal clock source for 10 Gigabit Ethernet, SONET, and Serial Attached SCSI applications.
