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SN74HC148 Datasheet(PDF) 5 Page - Texas Instruments |
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SN74HC148 Datasheet(HTML) 5 Page - Texas Instruments |
5 / 19 page SN54HC148, SN74HC148 8LINE TO 3LINE PRIORITY ENCODERS SCLS109G − MARCH 1984 − REVISED APRIL 2004 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 SN54HC148 SN74HC148 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 = −4 mA 4.5 V 3.98 4.3 3.7 3.84 V IOH = −5.2 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 = 4 mA 4.5 V 0.17 0.26 0.4 0.33 V IOL = 5.2 mA 6 V 0.15 0.26 0.4 0.33 II VI = VCC or 0 6 V ±0.1 ±100 ±1000 ±1000 nA 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 SN54HC148 SN74HC148 UNIT PARAMETER FROM (INPUT) TO (OUTPUT) VCC MIN TYP MAX MIN MAX MIN MAX UNIT 2 V 69 180 270 225 1−7 A0, A1, or A2 4.5 V 23 36 54 45 1−7 A0, A1, or A2 6 V 21 31 46 38 2 V 60 150 225 190 EO 4.5 V 20 30 45 38 0−7 EO 6 V 17 26 38 33 0−7 2 V 75 190 285 240 GS 4.5 V 25 38 57 48 tpd GS 6 V 21 32 48 41 ns tpd 2 V 78 195 295 245 ns A0, A1, or A2 4.5 V 26 39 59 49 A0, A1, or A2 6 V 22 33 50 42 2 V 57 145 220 180 EI GS 4.5 V 19 29 44 36 EI GS 6 V 16 25 38 31 2 V 66 165 250 205 EO 4.5 V 22 33 50 41 EO 6 V 19 28 43 35 2 V 28 75 110 95 tt Any 4.5 V 8 15 22 19 ns tt Any 6 V 6 13 19 16 ns |
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