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MPFS250T 数据表(PDF) 75 Page - Microchip Technology |
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MPFS250T 数据表(HTML) 75 Page - Microchip Technology |
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75 / 128 page ![]() Unit –1 Max –1 Typ –1 Min STD Max STD Typ STD Min Symbol Parameter MHz 175 20 156 20 FTXREFCLKPFD Reference clock rate at the Tx PLL PFD 4 MHz 175 75 156 75 FTXREFCLKPFD- 10G Reference clock rate recommend- ed at the PF- D for Tx rates 10 G- bps and above 4 dBc/Hz –110 –110 FTXREFPN Tx refer- ence clock phase noise require- ments to meet jitter specifica- tions (156 MHz clock at reference clock in- put) 5 dBc/Hz –110 –110 FTXREFPN Phase noise at 10 KHz dBc/Hz –115 –115 FTXREFPN Phase noise at 100 KHz dBc/Hz –135 –135 FTXREFPN Phase noise at 1 MHz ps 500 200 500 200 TREFRISE Reference clock input rise time (1 0%–90%) ps 500 200 500 200 TREFFALL Reference clock input fall time (90 %–10%) MHz 156 20 156 20 FRXREFCLKCDR Reference clock rate at RX CDR % 60 40 60 40 TREFDUTY Reference clock duty cycle % 3.1 0.1 3.1 0.1 Mod_S- pread Spread spectrum modulation spread 6 71 Microsemi Proprietary and Confidential. DS0147 Revision 1.0 AC Switching Characteristics |
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