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SL74HC652N 데이터시트(PDF) 6 Page - System Logic Semiconductor |
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SL74HC652N 데이터시트(HTML) 6 Page - System Logic Semiconductor |
6 / 9 page SL74HC652 System Logic Semiconductor SLS FUNCTION TABLE Dir. OE CAB CBA SAB SBA A B FUNCTION INPUTS INPUTS Both the A bus and the B bus are inputs. L H X X X X Z Z The output functions of the A and B bus are disabled. X X INPUTS INPUTS Both the A and B bus are used for inputs to the internal flip-flops. Data at the bus will be stored on low to high transition of the clock inputs. OUTPUTS INPUTS The A bus are outputs and the B bus are inputs. X * X X L L H L H The data at the B bus are displayed at the A bus. L L X * X L L H L H The data at the B bus are displayed at the A bus. The data of the B bus are stored to the internal flip-flops on low to high transition of the clock pulse. X * X X H Qn X The data stored to the internal flip-flops, are displayed at the A bus. X * X H H L H L The data at the B bus are stored to the internal flip-flops on low to high transition of the clock pulse. The states of the internal flip-flops output directly to the A bus. INPUTS OUTPUTS The A bus are inputs and the B bus are outputs. X X * L X L H L H The data at the A bus are displayed at the B bus. H H X * L X L H L H The data at the B bus are displayed at the A bus. The data of the B bus are stored to the internal flip-flops on low to high transition of the clock pulse. X X * H X X Qn The data stored to the internal flip-flops are displayed at the B bus. X * H X L H L H The data at the A bus are stored to the internal flip-flops on low to high transition of the clock pulse. The states of the internal flip-flops output directly to the B bus. OUTPUTS OUTPUTS Both the A bus and the B bus are outputs H L X X H H Qn Qn The data stored to the internal flip-flops are displayed at the A and B bus respectively. H H Qn Qn The output at the A bus are displayed at the B bus, the output at the B bus are displayed at the A bus respec. X : DON’T CARE Z : HIGH IMPEDANCE Qn : THE DATA STORED TO THE INTERNAL FLIP-FLOPS BY MOST RECENT LOW TO HIGH TRANSITION OF THE CLOCK INPUTS * : THE DATA AT THE A AND B BUS WILL BE STORED TO THE INTERNAL FLIP-FLOPS ON EVERY LOW TO TRANSITION OF THE CLOCK INPUTS |
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