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TS3USB221A 数据表(PDF) 6 Page - Texas Instruments |
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TS3USB221A 数据表(HTML) 6 Page - Texas Instruments |
6 / 25 page TS3USB221A SCDS277A – NOVEMBER 2008 – REVISED FEBRUARY 2015 www.ti.com 7.7 Dynamic Electrical Characteristics, VCC = 2.5 V ±10% over operating range, TA = –40°C to 85°C, VCC = 2.5 V ±10%, GND = 0 V PARAMETER TEST CONDITIONS MIN TYP MAX UNIT XTALK Crosstalk RL = 50 , f = 250 MHz –39 dB OIRR OFF isolation RL = 50 , f = 250 MHz -40 dB BW Bandwidth (3 dB) RL = 50 0.9 GHz 7.8 Switching Characteristics, VCC = 3.3 V ±10% over operating range, TA = –40°C to 85°C, VCC = 3.3 V ±10%, GND = 0 V PARAMETER MIN TYP(1) MAX UNIT tpd Propagation delay(2) (3) 0.25 ns S to D, nD 30 tON Line enable time ns OE to D, nD 17 S to D, nD 12 tOFF Line disable time ns OE to D, nD 10 tSK(O) Output skew between center port to any other port(2) 0.1 0.2 ns tSK(P) Skew between opposite transitions of the same output (tPHL– tPLH) (2) 0.1 0.2 ns (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. 7.9 Switching Characteristics, VCC = 2.5 V ±10% over operating range, TA = –40°C to 85°C, VCC = 2.5 V ±10%, GND = 0 V PARAMETER MIN TYP(1) MAX UNIT tpd Propagation delay(2) (3) 0.25 ns S to D, nD 50 tON Line enable time ns OE to D, nD 32 S to D, nD 23 tOFF Line disable time ns OE to D, nD 12 tSK(O) Output skew between center port to any other port(2) 0.1 0.2 ns tSK(P) Skew between opposite transitions of the same output (tPHL– tPLH) (2) 0.1 0.2 ns (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. 6 Submit Documentation Feedback Copyright © 2008–2015, Texas Instruments Incorporated Product Folder Links: TS3USB221A |
类似零件编号 - TS3USB221A_15 |
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类似说明 - TS3USB221A_15 |
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