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CD54HC374 Datasheet(PDF) 7 Page - Texas Instruments |
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CD54HC374 Datasheet(HTML) 7 Page - Texas Instruments |
7 / 18 page 7 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 TRANSITION TIMES AND PROPAGATION DELAY TIMES, COMBINATION LOGIC FIGURE 4. HCT TRANSITION TIMES AND PROPAGATION DELAY TIMES, COMBINATION LOGIC FIGURE 5. HC SETUP TIMES, HOLD TIMES, REMOVAL TIME, AND PROPAGATION DELAY TIMES FOR EDGE TRIGGERED SEQUENTIAL LOGIC CIRCUITS FIGURE 6. HCT SETUP TIMES, HOLD TIMES, REMOVAL TIME, AND PROPAGATION DELAY TIMES FOR EDGE TRIGGERED SEQUENTIAL LOGIC CIRCUITS 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% trCL tfCL GND VCC GND VCC 50% 90% 10% GND CLOCK INPUT DATA INPUT OUTPUT SET, RESET OR PRESET VCC 50% 50% 90% 10% 50% 90% tREM tPLH tSU(H) tTLH tTHL tH(L) tPHL IC CL 50pF tSU(L) tH(H) trCL tfCL GND 3V GND 3V 1.3V 2.7V 0.3V GND CLOCK INPUT DATA INPUT OUTPUT SET, RESET OR PRESET 3V 1.3V 1.3V 1.3V 90% 10% 1.3V 90% tREM tPLH tSU(H) tTLH tTHL tH(L) tPHL IC CL 50pF tSU(L) 1.3V tH(H) 1.3V CD54/74HC374, CD54/74HCT374, CD54/74HC574, CD54/74HCT574 |
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