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CD54HCT280 Datasheet(PDF) 4 Page - Texas Instruments |
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CD54HCT280 Datasheet(HTML) 4 Page - Texas Instruments |
4 / 12 page 4 Output Transition Time tTLH, tTHL CL = 50pF 2 - 75 95 110 ns 4.5 - 15 19 22 ns 6 - 13 16 19 ns Input Capacitance CI -- - 10 10 10 pF Power Dissipation Capacitance (Notes 3, 4) CPD - 5 58 - - - pF HCT TYPES Propagation Delay, Any Input to ΣO tPLH, tPHL CL = 50pF 4.5 - 45 56 68 ns CL = 15pF 5 19 - - - ns Propagation Delay, Any Input to ΣE tPLH, tPHL CL = 50pF 4.5 - 42 53 63 ns CL = 15pF 5 18 - - - ns Output Transition Time tTLH, tTHL CL = 50pF 4.5 - 15 19 22 ns Input Capacitance CIN -- - 10 10 10 pF Power Dissipation Capacitance (Notes 3, 4) CPD - 5 58 - - - pF NOTES: 3. CPD is used to determine the dynamic power consumption, per package. 4. PD = VCC 2 f i (CPD + CL) where fi = Input Frequency, fO = Output 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 TYP MAX MAX MAX Test Circuits and Waveforms FIGURE 1. HC TRANSITION TIMES AND PROPAGATION DELAY TIMES, COMBINATION LOGIC FIGURE 2. HCT TRANSITION TIMES AND PROPAGATION DELAY TIMES, COMBINATION LOGIC tPHL tPLH tTHL tTLH 90% 50% 10% 50% 10% INVERTING OUTPUT INPUT GND VCC tr = 6ns tf = 6ns 90% tPHL tPLH tTHL tTLH 2.7V 1.3V 0.3V 1.3V 10% INVERTING OUTPUT INPUT GND 3V tr = 6ns tf = 6ns 90% CD54HC280, CD74HC280, CD54HCT280, CD74HCT280 |
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