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SI5340 Datasheet(PDF) 9 Page - Silicon Laboratories |
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SI5340 Datasheet(HTML) 9 Page - Silicon Laboratories |
9 / 56 page Si5341/40 Rev. 1.0 9 Table 5. Differential Clock Output Specifications (VDD = 1.8 V ±5%, VDDA =3.3 V ±5%, VDDO = 1.8 V ±5%, 2.5 V ±5%, or 3.3 V ±5%, TA = –40 to 85 °C) Parameter Symbol Test Condition Min Typ Max Units Output Frequency fOUT 0.0001 — 712.5 MHz Duty Cycle DC fOUT < 400 MHz 48 — 52 % 400 MHz < fOUT < 712.5 MHz 45 — 55 % Output-Output Skew TSK Outputs on same Multisynth, Normal Mode —20 50 ps Outputs on same Multisynth, Pow Power Mode —20 100 ps OUT-OUT Skew TSK_OUT Measured from the positive to negative output pins —0 100 ps Output Amplitude1, 5 Normal Mode VOUT VDDO =3.3 V, 2.5 V, or 1.8 V LVDS 350 470 550 mVpp_se VDDO =3.3 V or 2.5 V LVPECL 660 810 1000 Low Power Mode VOUT VDDO =3.3 V, 2.5 V, or 1.8 V LVDS 300 420 530 mVpp_se VDDO =3.3 V or 2.5 V LVPECL 620 820 1060 Notes: 1. The typical normal mode (or low power mode) LVDS maximum is 100 mV (or 80 mV) higher than the TIA/EIA-644 maximum. For normal and low-power modes, the amplitudes are programmable through register settings and can be stored in NVM. Each output driver can be programmed independently. See Appendix A of the Si5341/40 Reference Manual. 2. Driver output impedance depends on selected output mode (Normal, Low Power). 3. Measured for 156.25 MHz carrier frequency. Sinewave noise added to VDDO (1.8 V = 50 mVpp, 2.5 V/ 3.3 V = 100 mVpp) and noise spur amplitude measured. 4. Measured across two adjacent outputs, both in LVDS mode, with the victim running at 155.52 MHz and the aggressor at 156.25 MHz. Refer to application note, “AN862: Optimizing Si534x Jitter Performance in Next Generation Internet Infrastructure Systems”, guidance on crosstalk minimization. 5. For other amplitudes see Appendix A of the Si5341/40 Reference Manual. 6. See Note 4, but in this case the measurement is across two output clocks that have a single clock between them. 7. Same as Note 4, but the Si5340 has less crosstalk due to the spacing of adjacent outputs. OUTx OUTx Vpp_se Vpp_se Vpp_diff = 2*Vpp_se Vcm Vcm |
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