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CD74FCT821A Scheda tecnica(PDF) 4 Page - Texas Instruments |
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CD74FCT821A Scheda tecnica(HTML) 4 Page - Texas Instruments |
4 / 7 page 8-4 Switching Specifications Over Operating Range FCT Series tr, tf = 2.5ns, CL = 50pF, RL (See Figures) PARAMETER SYMBOL VCC (V) 25oC0oC TO 70oC UNITS TYP MIN MAX Propagation Delays (Note 6) Clock to Q CD74FCT821A tPLH, tPHL 5 7.5 1.5 10 ns Clock to Q CD74FCT822A tPLH, tPHL 5 7.5 1.5 10 ns Output Enable to Q CD74FCT821A tPZL, tPZH 5 9 1.5 12 ns Output Disable to Q CD74FCT821A tPLZ, tPHZ 5 6 1.5 8 ns Output Enable to Q CD74FCT822A tPZL, tPZH 5 9 1.5 12 ns Output Disable to Q CD74FCT822A tPLZ, tPHZ 5 6 1.5 8 ns Power Dissipation Capacitance (Note 7) CPD − pF Minimum (Valley) VOH During Switching of Other Outputs (Output Under Test Not Switching) VOHV 5 0.5 Typical at 25oCV Maximum (Peak) VOL During Switching of Other Outputs (Output Under Test Not Switching) VOLP 5 1 Typical at 25oCV Input Capacitance CI --- 10 pF Three-State Output Capacitance CO --- 15 pF NOTES: 6. 5V: Minimum is at 5.25V for 0oC to 70oC, Maximum is at 4.75 for 0oc t0 70oC, Typical is at 5V. 7. CPD, measured per flip-flop, is used to determine the dynamic power consumption. PD (per package) = VCC ICC + Σ (VCC 2 f I CPD + VO 2 f OCL + VCC ∆ICC D) where: VCC = supply voltage ∆ICC = flow through current x unit load CL = output load capacitance D = duty cycle of input high fO = output frequency fI = input frequency Prerequisite for Switching PARAMETER SYMBOL VCC (V) 25oC0oC TO 70oC UNITS TYP MIN MAX Maximum Frequency (Note 8) fMAX 5 - 70 - MHz Data to Clock Setup Time tSU 5-4- ns Data to Clock Hold Time tH 5-2- ns Clock Pulse Width tW 5-7- ns NOTE: 8. 5V: Minimum is at 4.75V for 0oC to 70oC, Typical is at 5V. CD74FCT821A, CD74FCT822A |
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