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CD74HC243 Datasheet(PDF) 5 Page - Texas Instruments |
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CD74HC243 Datasheet(HTML) 5 Page - Texas Instruments |
5 / 14 page 5 Switching Specifications Input tr, tf = 6ns PARAMETER SYMBOL TEST CONDITIONS VCC (V) 25oC -40oC TO 85oC -55oC TO 125oC UNITS TYP MAX MAX MAX HC TYPES Propagation Delay Data to Outputs tPLH, tPHL CL = 50pF 2 - 90 115 135 ns 4.5 - 18 23 27 ns CL = 15pF 5 7 - - - ns CL = 50pF 6 - 15 20 23 ns Output High-Z, to High Level to Low Level tPZL, tPZH CL = 50pF 2 - 150 190 225 ns CL = 50pF 4.5 - 30 38 45 ns CL = 15pF 5 12 - - - ns CL = 50pF 6 - 26 33 38 ns Output High Level, Output Low Level to High-Z tPHZ, tPLZ CL = 50pF 2 - 150 190 225 ns CL = 50pF 4.5 - 30 38 45 ns CL = 15pF 5 12 - - - ns CL = 50pF 6 - 26 33 38 ns Output Transition Times tTLH, tTHL CL = 50pF 2 - 60 75 90 ns 4.5 - 12 15 18 ns 6 - 10 13 15 ns Input Capacitance CI -- - 10 10 10 pF Three-State Output Capacitance CO -- - 20 20 20 pF Power Dissipation Capacitance (Notes 3, 4) CPD - 5 80 - - - pF HCT TYPES Propagation Delay Data to Outputs tPLH, tPHL CL = 50pF 4.5 - 22 28 33 ns CL = 15pF 5 9 - - - ns Output High-Z to High Level to Low Level tPZH, tPZL CL = 50pF 4.5 - 34 43 51 ns CL = 15pF 5 14 - - - ns Output High Level, Output Low Level to High-Z tPHZ, tPLZ CL = 50pF 4.5 - 35 44 53 ns CL = 15pF 5 14 - - - ns Output Transition Times tTLH, tTHL CL = 50pF 4.5 - 12 15 18 ns Input Capacitance CI -- - 10 10 10 pF Three-State Output Capacitance CO -- - 20 20 20 pF Power Dissipation Capacitance (Notes 3, 4) CPD - 5 91 - - - pF NOTES: 3. CPD is used to determine the dynamic power consumption, per channel. 4. PD = VCC 2 f i (CPD + CL) where fi = Input Frequency, fO = Output Frequency, CL = Output Load Capacitance, VCC = Supply Voltage. CD54HC243, CD74HC243, CD54HCT243, CD74HCT243 |
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