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CD74HC193 数据表(PDF) 9 Page - Texas Instruments |
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CD74HC193 数据表(HTML) 9 Page - Texas Instruments |
9 / 20 page 9 FIGURE 2. ’HC193 SYNCHRONOUS BINARY COUNTERS, TYPICAL RESET, PRESET AND COUNT SEQUENCES FIGURE 3. CLOCK TO OUTPUT DELAYS AND CLOCK PULSE WIDTH FIGURE 4. CLOCK TO TERMINAL COUNT DELAYS FIGURE 5. PARALLEL LOAD PULSE WIDTH, PARALLEL LOAD TO OUTPUT DELAYS, AND PARALLEL LOAD TO CLOCK RECOVERY TIME FIGURE 6. MASTER RESET PULSE WIDTH, MASTER RESET TO OUTPUT DELAY AND MASTER RESET TO CLOCK RECOVERY TIME Test Circuits and Waveforms (Continued) MASTER RESET ASYNCHRONOUS PARALLEL LOAD PRESET DATA P0 P1 P2 P3 CLOCK UP CLOCK DOWN OUTPUTS Q0 Q1 Q2 Q3 TERMINAL COUNT UP TERMINAL COUNT DOWN 013 14 15 0 1 2 COUNT DOWN COUNT UP RESET 1 0 15 14 13 PRESET SEQUENCES: 1. RESET OUTPUTS TO ZERO. 2. LOAD (PRESET) TO BINARY THIRTEEN. 3. COUNT UP TO FOURTEEN, FIFTEEN, TERMINAL COUNT UP, ZERO, ONE AND TWO. 4. COUNT DOWN TO ONE, ZERO, TERMINAL COUNT DOWN, FIFTEEN, FOURTEEN AND THIRTEEN. NOTES: 1. Master reset overrides load data and clock inputs. 2. When counting up, clock-down input must be high. When counting down, clock-up input must be high. CPU OR CPD l/fMAX INPUT LEVEL VS VS VS tPHL tPLH VS Qn VS tW INPUT LEVEL TCU OR TCD tPHL tPLH VS VS CPU OR CPD VS VS INPUT LEVEL INPUT LEVEL INPUT LEVEL CPU OR CPD VS VS tPLH Qn VS tW VS VS VS tW Pn PL tPHL tREC VS MR CPU OR CPD Qn tPHL VS VS INPUT LEVEL tREC INPUT LEVEL VS VS tW CD54/74HC192, CD54/74HC193, CD54/74HCT193 |
类似零件编号 - CD74HC193 |
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类似说明 - CD74HC193 |
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