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TS3USB30RSWR データシート(PDF) 5 Page - Texas Instruments |
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TS3USB30RSWR データシート(HTML) 5 Page - Texas Instruments |
5 / 12 page www.ti.com Switching Characteristics TS3USB30 HIGH-SPEED USB 2.0 (480-Mbps) 1:2 MULTIPLEXER/DEMULTIPLEXER SWITCH WITH SINGLE ENABLE SCDS237 – JUNE 2007 over operating range, T A = –40°C to 85°C, VCC = 3.3 V ± 10%, GND = 0 V PARAMETER TEST CONDITIONS MIN TYP(1) MAX UNIT RL = 50 Ω, CL = 5 pF, tpd Propagation delay(2)(3) 0.25 ns See Figure 11 RL = 50 Ω, CL = 5 pF, tON Line enable time, SEL to D, nD 30 ns See Figure 7 RL = 50 Ω, CL = 5 pF, tOFF Line disable time, SEL to D, nD 25 ns See Figure 7 RL = 50 Ω, CL = 5 pF, tON Line enable time, OE to D, nD 30 ns See Figure 7 RL = 50 Ω, CL = 5 pF, tOFF Line disable time, OE to D, nD 25 ns See Figure 7 Output skew between center port to any other RL = 50 Ω, CL = 5 pF, tSK(O) 50 ps port(2) See Figure 12 Skew between opposite transitions of the same RL = 50 Ω, CL = 5 pF, tSK(P) output 20 ps See Figure 12 (tPHL – tPLH)(2) RL = 50 Ω, CL = 5 pF, tJ Total Jitter(2) tR = tF = 500 ps at 480 20 ps Mbps (PRBS = 215 -1) (1) For max or min conditions, use the appropriate value specified under "electrical characteristics" for the applicable device type. (2) Specified by design (3) The bus switch contributes no propagational delay other than the RC delay of the on resistance of the switch and the load capacitance. The time constant for the switch alone is of the order of 0.25 ns for 10-pF load. Since this time constant is much smaller than the rise/fall times of typical driving signals, it adds very little propagational delay to the system. Propagational delay of the bus switch, when used in a system, is determined by the driving circuit on the driving side of the switch and its interactions with the load on the driven side. 5 Submit Documentation Feedback |
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