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CD74HC423M Datasheet(PDF) 8 Page - Texas Instruments |
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CD74HC423M Datasheet(HTML) 8 Page - Texas Instruments |
8 / 19 page 8 Test Circuits and Waveforms FIGURE 1. OUTPUT PULSE CONTROL USING RESET INPUT (R) PULSE FOR 123 FIGURE 2. OUTPUT PULSE CONTROL USING RESET INPUT (R) FOR 423 FIGURE 3. TRIGGERING OF ONE SHOT BY INPUT A OR INPUT B FOR A PERIOD tW FIGURE 4. TYPICAL OUTPUT PULSE WIDTH AS A FUNCTION OF CX FOR RX = 10kΩ AND 100kΩ FIGURE 5. TYPICAL “K” FACTOR AS A FUNCTION OF VCC B = LOW A = HIGH tW tW VS VS Q R B A tW tW A B R B = LOW A = HIGH Q tW VS VS tW tW A B B A Q trT (R = HIGH) tW tW tW tW NOTE: Output pulse control using retrigger pulse for 123 and 423. VS 2 4 6 8 103 102 101 2 4 6 8 2 4 6 8 2 4 6 8 EXTERNAL CAPACITANCE (CX) - pF 24 6 8 103 104 2 4 68 2 4 68 2 4 68 105 106 107 R X = 100k Ω R X = 10k Ω DC SUPPLY VOLTAGE (VCC) = 5V AMBIENT TEMPERATURE (TA) = 25 oC EXTERNAL CAPACITANCE (CX) = 10nF EXTERNAL RESISTANCE (RX) = 10kΩ TO 100kΩ AMBIENT TEMPERATURE (TA) = 25 oC 0.9 0.8 0.7 0.6 0.5 0.4 0.3 0.2 0.1 12 3 4 5 6 7 8 9 10 11 HCT DC SUPPLY VOLTAGE (VCC) - VOLTS |
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