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SI5351A-B-GM Fiches technique(PDF) 6 Page - Silicon Laboratories |
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SI5351A-B-GM Fiches technique(HTML) 6 Page - Silicon Laboratories |
6 / 31 page Si5350C-B 6 Rev. 1.0 Table 6. Output Characteristics VDD = 1.8 V ±5%, 2.5 V ±10%, or 3.3 V ±10%, TA = –40 to 85 °C) Parameter Symbol Test Condition Min Typ Max Units Frequency Range1 FCLK 0.0025 — 200 MHz Load Capacitance CL FCLK < 100 MHz — — 15 pF Duty Cycle DC FCLK < 160 MHz, Measured at VDD/2 45 50 55 % FCLK > 160 MHz, Measured at VDD/2 40 50 60 % Rise/Fall Time tr/tf 20%–80%, CL = 5 pF — 1 1.5 ns Output High Voltage VOH CL =5pF VDD – 0.6 — — V Output Low Voltage VOL —— 0.6 V Period Jitter2,3 JPER 20-QFN, 4 outputs running, 1 per VDDO ‐ 40 95 ps, pk‐pk 10-MSOP or 20-QFN, all outputs running ‐ 70 155 ps, pk‐pk Cycle-to-cycle Jitter2,3 JCC 20-QFN, 4 outputs running, 1 per VDDO —50 90 ps, pk 10-MSOP or 20-QFN, all outputs running — 70 150 ps, pk Notes: 1. Only two unique frequencies above 112.5 MHz can be simultaneously output. 2. Measured over 10k cycles. Jitter is only specified at the default high drive strength (50 output impedance). 3. Jitter is highly dependent on device frequency configuration. Specifications represent a “worst case, real world” frequency plan; actual performance may be substantially better. Three-output 10MSOP package measured with clock outputs of 74.25, 24.576, and 48 MHz. Eight-output 20QFN package measured with clock outputs of 33.33, 74.25, 27, 24.576, 22.5792, 28.322, 125, and 48 MHz. Table 7. 25 MHz Crystal Requirements1,2 Parameter Symbol Min Typ Max Unit Crystal Frequency fXTAL —25— MHz Load Capacitance CL 6— 12 pF Equivalent Series Resistance rESR —— 150 Crystal Max Drive Level dL 100 — — µW Notes: 1. Crystals which require load capacitances of 6, 8, or 10 pF should use the device’s internal load capacitance for optimum performance. See register 183 bits 7:6. A crystal with a 12 pF load capacitance requirement should use a combination of the internal 10 pF load capacitance in addition to external 2 pF load capacitance (e.g., by using 4 pF capacitors on XA and XB). 2. Refer to “AN551: Crystal Selection Guide” for more details. |
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