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KK74HCT21AD Datasheet(PDF) 4 Page - KODENSHI_AUK CORP. |
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KK74HCT21AD Datasheet(HTML) 4 Page - KODENSHI_AUK CORP. |
4 / 5 page KK74HCT21A AC ELECTRICAL CHARACTERISTICS (CL=50pF,Input tr=tf=6.0 ns) VCC Guaranteed Limit Symbol Parameter V 25 °C to -55 °C ≤85°C ≤125°C Unit tPHL, tPLH Maximum Propagation Delay (Figure 1) 4.5 27 34 41 ns tTHL, tTLH Maximum Output Transition Time (Figure 1) 4.5 15 19 22 ns CIN Maximum Input Capacitance 5.0 10 10 10 pF Power Dissipation Capacitance (Per Gate) TA=25°C,VCC=5.0 V CPD Used to determine the no-load dynamic power consumption: PD=CPDVCC 2f+ICCVCC 50 pF 0.1 0.1 0.9 0.9 V 1 V 1 V IH t PHL t HL t PLH t LH GND V 1 V 1 V = 1.3 V V = 3.0 V 1 I Input Output 0.1 0.1 0.9 0.9 t THL t TLH 0 V V OH Figure 1. Switching Waveforms PULSE GENERATOR DEVICE UNDER TEST V CC V I V O C 50 pF L R T Termination resistance RT – should be equal to ZOUT of pulse generators Figure 2. Test Circuit 4 |
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