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CD54HC74F3A Datasheet(PDF) 6 Page - Texas Instruments |
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CD54HC74F3A Datasheet(HTML) 6 Page - Texas Instruments |
6 / 12 page 6 CP Frequency fMAX CL = 15pF 5 - 50 - ---- MHz Power Dissipation Capacitance (Notes 4, 5) CPD - 5 - 25 - ---- pF HCT TYPES Propagation Delay, CP to Q, Q (Figure 4) tPLH, tPHL CL = 50pF 4.5 - - 35 - 44 - 53 ns Propagation Delay, R, S to Q, Q (Figure 4) tPHL, tPLH CL = 50pF 4.5 - - 40 - 50 - 60 ns Transition Time (Figure 4) tTLH, tTHL CL = 50pF 4.5 - - 15 - 19 - 22 ns Input Capacitance CI - - - - 10 - 10 - 10 pF CP Frequency fMAX CL = 15pF 5 - 50 - ---- MHz Power Dissipation Capacitance (Notes 4, 5) CPD - 5 - 30 - ---- pF NOTES: 4. CPD is used to determine the dynamic power consumption, per flip-flop. 5. 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 1. 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 2. HCT CLOCK PULSE RISE AND FALL TIMES AND PULSE WIDTH FIGURE 3. HC AND HCU TRANSITION TIMES AND PROPAGA- TION DELAY TIMES, COMBINATION LOGIC FIGURE 4. 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% CD54HC74, CD74HC74, CD54HCT74, CD74HCT74 |
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