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HCF4541B 数据表(PDF) 6 Page - STMicroelectronics |
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HCF4541B 数据表(HTML) 6 Page - STMicroelectronics |
6 / 11 page DIGITAL TIMER APPLICATION A positive MASTER RESET pulse clears the counters and latch. The output goes high and keeps up till the number of pulses, selected by A and B, are counted. This circuit is retriggerable and is as accur- ate as the input frequency. If a more accurate circuit is desired, an external clock can be used on pin 3. A set-up time equal to the width of the one shot out- put is required immediately following initial power up, during which time the output will be high. FREQUENCY SELECTION TABLE TRUTH TABLE AB N ° of Stages N Count 2 N 0 0 13 8192 0 1 10 1024 1 0 18 256 1 1 16 65536 Pin State 01 5 Auto Reset On Auto Reset Disable 6 Master Reset Off Master Reset On 9 Output Initially Low After Reset (Q) Output Initially High After Reset (Q) 10 Single Transition Mode Recycle Mode HCC/HCF4541B 6/11 |
类似零件编号 - HCF4541B |
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类似说明 - HCF4541B |
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