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P1AFS1500-PQ484ES Datasheet(PDF) 36 Page - Microsemi Corporation |
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P1AFS1500-PQ484ES Datasheet(HTML) 36 Page - Microsemi Corporation |
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36 / 334 page  Device Architecture 2-20 Revision 4 RC Oscillator The RC oscillator is an on-chip free-running clock source generating a 100 MHz clock. It can be used as a source clock for both on-chip and off-chip resources. When used in conjunction with the Fusion PLL and CCC circuits, the RC oscillator clock source can be used to generate clocks of varying frequency and phase. The Fusion RC oscillator is very accurate at ±1% over commercial temperature ranges and and ±3% over industrial temperature ranges. It is an automated clock, requiring no setup or configuration by the user. It requires only that the power and GNDOSC pins be connected; no external components are required. The RC oscillator can be used to drive either a PLL or another internal signal. RC Oscillator Characteristics Table 2-9 • Electrical Characteristics of RC Oscillator Parameter Description Conditions Min. Typ. Max. Units FRC Operating Frequency 100 MHz Accuracy Temperature: 0°C to 85°C Voltage: 3.3 V ± 5% 1% Temperature: –40°C to 125°C Voltage: 3.3 V ± 5% 3% Output Jitter Period Jitter (at 5 k cycles) 100 ps Cycle–Cycle Jitter (at 5 k cycles) 100 ps Period Jitter (at 5 k cycles) with 1 KHz / 300 mV peak-to-peak noise on power supply 150 ps Cycle–Cycle Jitter (at 5 k cycles) with 1 KHz / 300 mV peak-to-peak noise on power supply 150 ps Output Duty Cycle 50 % IDYNRC Operating Current 1 mA |
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