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HCF4089BM1 数据表(PDF) 7 Page - STMicroelectronics |
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HCF4089BM1 数据表(HTML) 7 Page - STMicroelectronics |
7 / 11 page HCF4089B 7/11 APPLICATION NOTES For words of more than 4 bits, HCF4089B device may be cascaded in two different modes : an ADD mode and a MULTIPLY mode. TWO HCF4089B’S CASCADED IN THE "ADD" MODE WITH A PRESET NUMBER OF 189 In the ADD mode some of the gaps left by the more significant unit at the count of 15 are filled in by the less significant units. For example, when two units are cascaded in the ADD mode and programmed to 11 and 13, respectively, the more significant unit will have 11 output pulses and the other unit will have 13 output pulses for every 256 input pulses for a total of : 11 13 189 + = 16 256 256 TWO HCF4089B’S CASCADED IN THE "MULTIPLY" MODE FOR MULTIPLICATION OF TWO VARIABLES A AND B WITH LOOP CIRCUIT CONTROL A B 1 N When the loop stabilities rate R2 = rate R3, thus fclock( • ) = fclock ( • ) therefore N = AB 16 16 16 16 |
类似零件编号 - HCF4089BM1 |
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类似说明 - HCF4089BM1 |
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