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SI5351C-B Datasheet(PDF) 6 Page - Silicon Laboratories |
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SI5351C-B Datasheet(HTML) 6 Page - Silicon Laboratories |
6 / 41 page Si5351A/B/C-B 6 Rev. 1.0 Table 4. AC Characteristics (VDD = 2.5 V ±10%, or 3.3 V ±10%, TA = –40 to 85 °C) Parameter Symbol Test Condition Min Typ Max Unit Power-up Time TRDY From VDD =VDDmin to valid output clock, CL =5pF, fCLKn >1MHz —2 10 ms Power-up Time, PLL Bypass Mode TBYP From VDD =VDDmin to valid output clock, CL =5pF, fCLKn >1MHz —0.5 1 ms Output Enable Time TOE From OEB pulled low to valid clock output, CL =5pF, fCLKn >1MHz —— 10 µs Output Frequency Transition Time TFREQ fCLKn >1MHz — — 10 µs Output Phase Offset PSTEP — 333 — ps/step Spread Spectrum Frequency Deviation SSDEV Down spread. Selectable in 0.1% steps. –0.1 — –2.5 % Center spread. Selectable in 0.1% steps. ±0.1 — ±1.5 % Spread Spectrum Modulation Rate SSMOD 30 31.5 33 kHz VCXO Specifications (Si5351B only) VCXO Control Voltage Range Vc 0 VDD/2 VDD V VCXO Gain (configurable) Kv Vc = 10–90% of VDD, VDD = 3.3 V 18 — 150 ppm/V VCXO Control Voltage Linearity KVL Vc = 10–90% of VDD –5 — +5 % VCXO Pull Range (configurable) PR VDD = 3.3 V* ±30 0 ±240 ppm VCXO Modulation Bandwidth — 10 — kHz *Note: Contact Silicon Labs for 2.5 V VCXO operation. Table 5. Input Clock Characteristics (VDD = 2.5 V ±10%, or 3.3 V ±10%, TA = –40 to 85 °C) Parameter Symbol Test Condition Min Typ Max Unit Crystal Frequency fXTAL 25 — 27 MHz CLKIN Input Low Voltage VIL –0.1 — 0.3 x VDD V CLKIN Input High Voltage VIH 0.7 x VDD —3.60 V CLKIN Frequency Range fCLKIN 10 — 100 MHz |
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