M74HC390 查看數據表（PDF） - STMicroelectronics
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M74HC390 Datasheet PDF : 13 Pages
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M54/M74HC390
TIMING CHART
(1) BCD COUNT SEQUENCE *
(2) BI-QUINARY COUNT SEQUENCE **
*OUTPUT QA IS CONNECTED TO INPUT CLOCK B
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M74HC390 Datasheet PDF : 13 Pages
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