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CD74HC541E Datasheet(PDF) 7 Page - Texas Instruments |
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CD74HC541E Datasheet(HTML) 7 Page - Texas Instruments |
7 / 16 page 7 Three-State Output Capacitance CO - - 20 - 20 - 20 - 20 pF Power Dissipation Capacitance (Notes 3, 4) (540, 541) CPD CL = 15pF 5 - 55 - - - - - 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, CL = Output Load Capacitance, VCC = Supply Voltage. Switching Specifications CL = 50pF, 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 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 FIGURE 3. HC THREE-STATE PROPAGATION DELAY WAVEFORM FIGURE 4. HCT THREE-STATE PROPAGATION DELAY WAVEFORM 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% 50% 10% 90% GND VCC 10% 90% 50% 50% OUTPUT DISABLE OUTPUT LOW TO OFF OUTPUT HIGH TO OFF OUTPUTS ENABLED OUTPUTS DISABLED OUTPUTS ENABLED 6ns 6ns tPZH tPHZ tPZL tPLZ 0.3 2.7 GND 3V 10% 90% 1.3V 1.3V OUTPUT DISABLE OUTPUT LOW TO OFF OUTPUT HIGH TO OFF OUTPUTS ENABLED OUTPUTS DISABLED OUTPUTS ENABLED tr 6ns tPZH tPHZ tPZL tPLZ 6ns tf 1.3 CD54/74HC540, CD74HCT540, CD54/74HC541, CD54/74HCT541 |
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