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SC2200 Datasheet(PDF) 408 Page - National Semiconductor (TI) |
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SC2200 Datasheet(HTML) 408 Page - National Semiconductor (TI) |
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408 / 433 page ![]() www.national.com 408 Revision 3.0 Electrical Specifications (Continued) 8.3.9 Universal Serial Bus (USB) Interface Table 8-28. USB Timing Parameters Symbol Parameter Min Max Unit Figure Comments Full Speed Source1, 2 tUSB_R1 DPOS_Port1,2,3, DNEG_Port1,2,3 Driver Rise Time 4 20 ns 8-37 (Monotonic) from 10% to 90% of the D_Port lines tUSB_F1 DPOS_Port1,2,3, DNEG_Port1,2,3 Driver Fall Time 4 20 ns 8-37 (Monotonic) from 90% to 10% of the D_Port lines tUSB_FRFM Rise/Fall time matching 90 110 % tUSB_FSDR Full-speed data rate 11.97 12.03 Mbps Average bit rate 12 Mbps ± 0.25% tUSB_FSF Full-speed frame interval 0.9995 1.0005 ms 1.0 ms ± 0.05% tperiod_F Full-speed period between data bits 83.1 83.5 ns Average bit rate 12 Mbps tUSB DOR Driver-output resistance 28 43 W Steady-state drive tUSB_DJ11 Source differential driver jitter3, 4 for consecutive transition –3.5 3.5 ns 8-38 tUSB_DJ12 Source differential driver jitter3, 4 for paired transitions –4.0 4.0 ns 8-38 tUSB_SE1 Source EOP width4, 5 160 175 ns 8-38 tUSB_DE1 Differential to EOP transition skew4, 5 –2 5 ns 8-39 tUSB_RJ11 Receiver data jitter tolerance4 for consecutive transition –18.5 18.5 ns 8-40 tUSB_RJ12 Receiver data jitter tolerance4 for paired transitions –9 9 ns 8-40 Full Speed Receiver EOP Width4 tUSB_RE11 Must reject as EOP5 40 ns 8-39 tUSB_RE12 Must accept as EOP5 82 ns 8-39 Low Speed Source1, 6 tUSB_R2 DPOS_Port1,2,3, DNEG_Port1,2,3 Driver Rise Time 75 3006 ns 8-37 (Monotonic) from 10% to 90% of the D_Port lines tUSB_F2 DPOS_Port1,2,3, DNEG_Port1,2,3 Driver Fall Time 75 3006 ns 8-37 (Monotonic) from 90% to 10% of the D_Port lines tUSB_LRFM Low-speed Rise/Fall time matching 80 120 % tUSB_LSDR Low-speed data rate 1.4775 1.5225 Mbps Average bit rate 1.5 Mbps ± 1.5% tPERIOD_L Low-speed period 0.657 0.677 µsat 1.5 Mbps tUSB_DJD21 Source differential driver jitter4 for consecutive transactions –75 75 ns Host (downstream) tUSB_DJD22 Source differential driver jitter4 for paired transactions –45 45 ns 8-38 Host (downstream) tUSB_DJU21 Source differential driver jitter4 for consecutive transaction –95 95 ns 8-38 Function (downstream) |
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