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CD74FCT844AEN データシート(PDF) 5 Page - Texas Instruments |
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CD74FCT844AEN データシート(HTML) 5 Page - Texas Instruments |
5 / 6 page 8-5 Switching Specifications Over Operating Range FCT Series tr, tf = 2.5ns, CL = 50pF, RL (Figure 1) PARAMETER SYMBOL VCC (V) 25oC0oC TO 70oC UNITS TYP MIN MAX Propagation Delays Data to Outputs CD74FCT843A tPLH, tPHL 5 (Note 6) 6.8 1.5 9 ns CD74FCT844A tPLH, tPHL 5 7.5 1.5 10 ns LE to Outputs tPLH, tPHL 5 9 1.5 12 ns PRE to Outputs tPLH 5 9 1.5 12 ns CLR to Outputs tPHL 5 9.8 1.5 13 ns Output Enable Times tPZL, tPZH - 10.5 1.5 14 ns Output Disable Times tPLZ, tPHZ - 6 1.5 8 ns Power Dissipation Capacitance CPD (Note 7) ---- pF Minimum (Valley) VOHV During Switching of Other Outputs (Output Under Test Not Switching) VOHV 5 0.5 - - V Maximum (Peak) VOLP During Switching of Other Outputs (Output Under Test Not Switching) VOLP 51 - - V 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 4.75V for 0oC to 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 Setup Time, Data to LE tSU 5 (Note 8) - 2.5 - ns Hold Time, Data to LE tH 5 - 2.5 - ns LE Pulse Width tW 5-4- ns PRE, CLR Pulse Width tW 5-8- ns PRE, CLR Recovery Time tREC 5 - 14 - ns NOTE: 8. Minimum is at 4.75V for 0oC to 70oC, Typical is at 5V. Test Circuits and Waveforms NOTE: 9. Pulse Generator for All Pulses: Rate ≤ 1.0MHz; ZOUT ≤ 50Ω; 3V 0 DUT PULSE ZO GEN 7V 500 Ω 50pF 500 Ω VCC RT RT = ZO V0 CL RL RL VI tr, tf = 2.5ns (NOTE 9) SWITCH POSITION TEST SWITCH tPLZ, tPZL, Open Drain Closed tPHZ, tPZH, tPLH, tPHL Open DEFINITIONS: CL = Load capacitance, includes jig and probe capacitance. RT = Termination resistance, should be equal to ZOUT of the Pulse Generator. V 0V to 3V CD74FCT843A, CD74FCT844A |
同様の部品番号 - CD74FCT844AEN |
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同様の説明 - CD74FCT844AEN |
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