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SI5340 Datasheet(PDF) 11 Page - Silicon Laboratories |
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SI5340 Datasheet(HTML) 11 Page - Silicon Laboratories |
11 / 56 page Si5341/40 Rev. 1.0 11 Output-Output Crosstalk XTALK Si5341 Note 4 —–75 — dBc Si5341 Note 6 —–85 — dBc Si5340 Note 7 —–85 — dBc Table 6. Output Status Pin Specifications (VDD =1.8 V ±5%, VDDA =3.3 V ±5%, VDDS = 3.3 V ±5%, 1.8 V ±5%, TA = –40 to 85 °C) Parameter Symbol Test Condition Min Typ Max Units Si5341 Status Output Pins (LOL, INTR), SDA/SDIO2, SDO Output Voltage VOH IOH = –2 mA VDDIO1 x 0.75 — — V VOL IOL = 2 mA — — VDDIO1 x 0.15 V Si5340 Status Output Pins (INTR), LOL, LOS_XAXB, SDA/SDIO2, SDO Output Voltage VOH IOH = –2 mA VDDIO1 x 0.75 — — V VOL IOL = 2 mA — — VDDIO1 x 0.15 V Notes: 1. VDDIO is determined by the IO_VDD_SEL bit. It is selectable as VDDA or VDD. Refer to the Reference Manual for more details on register settings. 2. The VOH specification does not apply to the open-drain SDA/SDIO output when the serial interface is in I2C mode or is unused with I2C_SEL pulled high. VOL remains valid in all cases. Table 5. Differential Clock Output Specifications (Continued) (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 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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