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CD74HCT73 Datasheet(PDF) 6 Page - Texas Instruments |
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CD74HCT73 Datasheet(HTML) 6 Page - Texas Instruments |
6 / 13 page 6 Input Capacitance CI - - - - 10 - 10 - 10 pF Power Dissipation Capacitance (Notes 3, 4) CPD - 5 - 28 - ---- pF HCT TYPES Propagation Delay, CP to Q tPLH, tPHL CL = 50pF 4.5 - - 38 - 48 - 57 ns Propagation Delay, CP to Q tPLH, tPHL CL = 50pF 4.5 - - 36 - 45 - 54 ns Propagation Delay, R to Q, Q tPLH, tPHL CL = 50pF 4.5 - - 34 - 43 - 51 ns Output Transition Time tTLH, tTHL CL = 50pF 4.5 - - 15 - 19 - 22 ns Input Capacitance CI - - - - 10 - 10 - 10 pF Power Dissipation Capacitance (Notes 3, 4) CPD - 5 - 28 - ---- pF NOTES: 3. CPD is used to determine the dynamic power consumption, per flip-flop. 4. PD =CPD VCC 2 f i + Σ CL VCC 2 f o 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 MIN TYP MAX MIN MAX MIN MAX Test Circuits and Waveforms NOTE: Outputs should be switching from 10% VCC to 90% VCC in accordance with device truth table. For fMAX, input duty cycle = 50%. FIGURE 2. HC CLOCK PULSE RISE AND FALL TIMES AND PULSE WIDTH NOTE: Outputs should be switching from 10% VCC to 90% VCC in accordance with device truth table. For fMAX, input duty cycle = 50%. FIGURE 3. HCT CLOCK PULSE RISE AND FALL TIMES AND PULSE WIDTH FIGURE 4. HC AND HCU TRANSITION TIMES AND PROPAGA- TION DELAY TIMES, COMBINATION LOGIC FIGURE 5. HCT TRANSITION TIMES AND PROPAGATION DELAY TIMES, COMBINATION LOGIC CLOCK 90% 50% 10% GND VCC trCL tfCL 50% 50% tWL tWH 10% tWL + tWH = fCL I CLOCK 2.7V 1.3V 0.3V GND 3V trCL = 6ns tfCL = 6ns 1.3V 1.3V tWL tWH 0.3V tWL + tWH = fCL I 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% CD54HC73, CD74HC73, CD74HCT73 |
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