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SN75971B Datasheet(PDF) 6 Page - Texas Instruments |
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SN75971B Datasheet(HTML) 6 Page - Texas Instruments |
6 / 15 page SN75971B SCSI DIFFERENTIAL CONVERTER-DATA SLLS322A – NOVEMBER 1999 – REVISED JANUARY 2000 6 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 electrical characteristics over recommended operating conditions (unless otherwise noted) PARAMETER TEST CONDITIONS MIN TYP† MAX UNIT VOD(H) Driver high-level differential output voltage See Figure 1 –1 –2.2 V VOD(L) Driver low-level differential output voltage See Figure 1 1 1.8 V VOH High-level output A side VID = – 200 mV, IOH = – 16 mA 2.5 4.2 V VOH g voltage B side IOH = – 60 mA 3.4 V VOL Low level output voltage A side VID = 200 mV, IOL = 16 mA 0.4 0.8 V VOL Low-level output voltage B side IOL = 60 mA 1.6 V VIT+ Receiver positive-going differential input threshold voltage IOH = – 16 mA See Figure 2 0.2 V VIT– Receiver negative-going differential input threshold voltage B side IOL = 16 mA See Figure 2 – 0.2§ V Vhys Receiver input hysteresis voltage (VIT + – VIT –) 35 45 mV VI = 12 V Other input at 0 V VCC = 5 V 0.6 1 mA II Bus input current BorB VI = 12 V, Other input at 0 V VCC = 0 0.7 1 mA II Bus input current B or B VI = 7 V Other input at 0 V VCC = 5 V – 0.5 – 0.8 mA VI = – 7 V, Other input at 0 V VCC = 0 – 0.4 – 0.8 mA A side –2 –5 –8 mA IIH High-level input current RESET, DSENS VIH = 2 V –70 – 100 µA SDB, DRVBUS 25 µA A side –6 –9 mA IIL Low-level input current RESET, DSENS VIL = 0.8 V –66 – 100 µA SDB, DRVBUS ±30 µA IOS Short-circuit output current B side VO = 5 V and 0 ±250 mA Hi h i d t t A side –2 –5 –8 IOZ High-impedance-state output current A side –6 –9 out ut current B side See II Disabled RESET at 0.8 V, Others open 38 46 ICC Supply current B to A Enabled SDB and DRVBUS at 2 V, All other inputs open, VID = – 1 V, No load 39 50 mA A to B Enabled SDB at 0.8 V, All other inputs open, DRVBUS at 2 V, No load 32 66 CO Output capacitance VI = 0.6 sin(2π × 106t) + 1.5 V, BDBn to GND 18 21 pF C d Power dissipation capacitance‡ B to A, One channel 40 pF Cpd Power dissipation capacitance‡ A to B, One channel 100 pF † All typical values are at VCC = 5 V, TA = 25°C. ‡ Cpd determines the no-load dynamic current consumption, IS = Cpd × VCC × f + ICC. § The algebraic convention with the least positive (more negative) limit is designated minimum, is used in this data sheet for the differential input voltage only. |
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