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SI5321 Scheda tecnica(PDF) 8 Page - List of Unclassifed Manufacturers |
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SI5321 Scheda tecnica(HTML) 8 Page - List of Unclassifed Manufacturers |
8 / 34 page Si5321 8 Rev. 2.3 Input Clock Frequency (CLKIN) FEC[2:0] = 110 (forward FEC) INFRQSEL[2:0] = 001 INFRQSEL[2:0] = 010 INFRQSEL[2:0] = 011 INFRQSEL[2:0] = 100 INFRQSEL[2:0] = 101 INFRQSEL[2:0] = 110 fCLKIN 66/64 FEC Scaling Minimum input frequency is in the 155 MHz range N/A N/A N/A 150.79 301.58 603.16 N/A N/A N/A — — — N/A N/A N/A 168.22 336.44 672.88 MHz Input Clock Frequency (CLKIN) FEC[2:0] = 111 (reverse FEC) INFRQSEL[2:0] = 001 INFRQSEL[2:0] = 010 INFRQSEL[2:0] = 011 INFRQSEL[2:0] = 100 INFRQSEL[2:0] = 101 INFRQSEL[2:0] = 110 fCLKIN 64/66 FEC Scaling Minimum input frequency is in the 155 MHz range N/A N/A N/A 160.36 320.72 641.46 N/A N/A N/A — — — N/A N/A N/A 178.90 357.80 715.59 MHz Input Clock Rise Time (CLKIN) tR Figure 2 — — 11 ns Input Clock Fall Time (CLKIN) tF Figure 2 — — 11 ns Input Clock Duty Cycle CDUTY_IN 40 50 60 % CLKOUT Frequency Range FRQSEL[2:0] = 001 FRQSEL[2:0] = 000 FRQSEL[2:0] = 100 FRQSEL[2:0] = 010 FRQSEL[2:0] = 101 FRQSEL[2:0] = 011 FRQSEL[2:0] = 110 FRQSEL[2:0] = 111 fO_19 fO_39 fO_78 fO_155 fO_311 fO_622 fO_1250 fO_2500 19.436 38.872 77.744 155.48 310.97 621.95 1243.9 2487.8 — — — — — — — — 21.685 43.369 86.738 173.48 346.95 693.90 1387.8 2775.6 MHz CLKOUT Rise Time tR Figure 2; single-ended; after 3 cm of 50 Ω FR4 stripline — 190 220 ps CLKOUT Fall Time tF Figure 2; single-ended; after 3 cm of 50 Ω FR4 stripline — 185 205 ps Output Clock Duty Cycle CDUTY_OUT Differential: (CLKOUT+) – (CLKOUT–) 48 — 52 % RSTN/CAL Pulse Width tRSTN 20 — — ns Table 3. AC Characteristics (Continued) (VDD33 =3.3 V ±5%, TA = –20 to 85 °C) Parameter Symbol Test Condition Min Typ Max Unit Note: The Si5321 provides a 1/32x, 1/16x, 1/8x, 1/4x, 1/2x, 1x, 2x, 4x, 8x, 16x, 32x, 64x, or 128x clock multiplication function with an option for additional frequency scaling by a factor of 255/238, 238/255, 255/237, 237/255, 66/64, or 64/66 for FEC rate conversion. |
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