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74AC163 数据表(PDF) 2 Page - STMicroelectronics |
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74AC163 数据表(HTML) 2 Page - STMicroelectronics |
2 / 13 page 74AC163 2/13 INPUT AND OUTPUT EQUIVALENT CIRCUIT PIN DESCRIPTION TRUTH TABLE X : Don’t Care; A, B, C, D; Logic level of data input; CARRY OUT : TE x QA x QB x QC x QD LOGIC DIAGRAM PIN No SYMBOL NAME AND FUNCTION 1 CLEAR Master Reset 2 CLOCK Clock Input (LOW to HIGH Edge Trigger) 3, 4, 5, 6 A, B, C, D Data Inputs 7 PE Count Enable Input 10 TE Count Enable Carry Input 9LOAD Parallel Enable Input 14, 13, 12, 11 QA to QD Flip-Flop Outputs 15 CARRY OUT Terminal Count Output 8 GND Ground (0V) 16 VCC Positive Supply Voltage INPUTS OUTPUTS FUNCTION CLEAR LOAD PE TE CK L X X X L L L L RESET TO "0" H L X X A B C D PRESET DATA H H X L NO CHANGE NO COUNT H H L X NO CHANGE NO COUNT HHHH COUNT UP COUNT H X X X NO CHANGE NO COUNT |
类似零件编号 - 74AC163_01 |
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类似说明 - 74AC163_01 |
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