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SN74HC251DT Datasheet(PDF) 5 Page - Texas Instruments |
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SN74HC251DT Datasheet(HTML) 5 Page - Texas Instruments |
5 / 17 page SN54HC251, SN74HC251 DATA SELECTORS/MULTIPLEXERS WITH 3STATE OUTPUTS SCLS132E − DECEMBER 1982 − REVISED SEPTEMBER 2003 5 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 electrical characteristics over recommended operating free-air temperature range (unless otherwise noted) PARAMETER TEST CONDITIONS VCC TA = 25°C SN54HC251 SN74HC251 UNIT PARAMETER TEST CONDITIONS VCC MIN TYP MAX MIN MAX MIN MAX UNIT 2 V 1.9 1.998 1.9 1.9 IOH = −20 µA 4.5 V 4.4 4.499 4.4 4.4 VOH VI = VIH or VIL IOH = −20 µA 6 V 5.9 5.999 5.9 5.9 V VOH VI = VIH or VIL IOH = −6 mA 4.5 V 3.98 4.3 3.7 3.84 V IOH = −7.8 mA 6 V 5.48 5.8 5.2 5.34 2 V 0.002 0.1 0.1 0.1 IOL = 20 µA 4.5 V 0.001 0.1 0.1 0.1 VOL VI = VIH or VIL IOL = 20 µA 6 V 0.001 0.1 0.1 0.1 V VOL VI = VIH or VIL IOL = 6 mA 4.5 V 0.17 0.26 0.4 0.33 V IOL = 7.8 mA 6 V 0.15 0.26 0.4 0.33 II VI = VCC or 0 6 V ±0.1 ±100 ±1000 ±1000 nA IOZ VO = VCC or 0, VI = VIH or VIL 6 V ±0.01 ±0.5 ±10 ±5 µA ICC VI = VCC or 0, IO = 0 6 V 8 160 80 µA Ci 2 V to 6 V 3 10 10 10 pF switching characteristics over recommended operating free-air temperature range, CL = 50 pF (unless otherwise noted) (see Figure 1) PARAMETER FROM TO VCC TA = 25°C SN54HC251 SN74HC251 UNIT PARAMETER FROM (INPUT) TO (OUTPUT) VCC MIN TYP MAX MIN MAX MIN MAX UNIT 2 V 58 205 300 256 A, B, or C W or Y 4.5 V 21 41 60 51 tpd A, B, or C W or Y 6 V 19 35 51 44 ns tpd 2 V 44 195 283 244 ns Any D W or Y 4.5 V 17 39 57 49 Any D W or Y 6 V 15 33 48 41 2 V 30 145 210 181 ten OE W or Y 4.5 V 10 29 42 36 ns ten OE W or Y 6 V 9 25 36 31 ns 2 V 25 195 283 244 tdis OE W or Y 4.5 V 15 39 57 49 ns tdis OE W or Y 6 V 14 33 48 41 ns 2 V 20 75 110 95 tt W or Y 4.5 V 8 15 22 19 ns tt W or Y 6 V 6 13 19 16 ns |
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