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CD54HC157 Datasheet(PDF) 5 Page - Texas Instruments |
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CD54HC157 Datasheet(HTML) 5 Page - Texas Instruments |
5 / 13 page 5 Enable to Output tPLH, tPHL CL = 50pF 2 - - 135 - 170 - 205 ns 4.5 - - 27 - 34 - 41 ns HC157 CL =15pF 5 - 11 - - - - - ns HCT157 - 12 - - - - - ns CL = 50pF 6 - - 23 - 29 - 35 ns Select to Output tPLH, tPHL CL = 50pF 2 - - 145 - 180 - 220 ns 4.5 - - 29 - 36 - 44 ns HC157 CL =15pF 5 - 12 - - - - - ns HCT157 - 15 - - - - - ns CL = 50pF 6 - - 25 - 31 - 38 ns Power Dissipation Capacitance (Notes 3, 4) CPD -5 HC157 - 62 - - - - - pF HCT157 - 70 - - - - - pF HC/HCT158 TYPES Data to Output tPLH, tPHL CL = 50pF 2 - - 140 - 175 - 210 ns 4.5 - - 28 - 35 - 42 HC158 CL =15pF 5 - 11 - - - - - ns HCT 158 - 13 - - - - - ns CL = 50pF 6 - - 24 - 30 - 36 ns Enable to Output tPLH, tPHL CL = 50pF 2 - - 160 - 200 - 240 ns 4.5 - - 32 - 40 - 48 ns HC158 CL =15pF 5 - 13 - - - - - ns HCT 158 - 15 - - - - - ns CL = 50pF 6 - - 27 - 34 - 41 ns Select to Output tPLH, tPHL CL = 50pF 2 - - 150 - 190 - 225 ns 4.5 - - 30 - 38 - 45 ns HC158 CL =15pF 5 - 12 - - - - - ns HCT 158 - 14 - - - - - ns CL = 50pF 6 - - 26 - 33 - 38 ns Output Transition Time tTLH, tTHL CL = 50pF 2 - - 75 - 95 - 110 ns 4.5 - - 15 - 19 - 22 ns 6 - - 13 - 16 - 19 ns Power Dissipation Capacitance (Notes 3, 4) CPD -5 HC158 - 35 - - - - - pF HCT 158 - 35 - - - - - pF Input Capacitance CIN CL = 50pF - - - 10 - 10 - 10 pF NOTES: 3. CPD is used to determine the dynamic power consumption, per multiplexer. 4. PD = VCC 2 f i (CPD + CL) where fi = input frequency, CL = output load capacitance, VCC = supply voltage. Switching Specifications Input tr, tf = 6ns (Continued) PARAMETER SYMBOL TEST CONDITIONS VCC (V) 25oC -40oC TO 85oC -55oC TO 125oC UNITS MIN TYP MAX MIN MAX MIN MAX CD54/74HC157, CD54/74HCT157, CD54/74HC158, CD54/74HCT158 |
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