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M74HC390B1R Datasheet(PDF) 2 Page - STMicroelectronics |
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M74HC390B1R Datasheet(HTML) 2 Page - STMicroelectronics |
2 / 13 page TRUTH TABLE COUNT OUTPUTS BCD COUNT * BI-QUINARY ** QD QC QB QA QA QD QC QB 0 LLLL LLL L 1 LLL H LLL H 2L L H L L L H L 3L L H H L L H H 4 L HL L L HL L 5L H L H H L L L 6L H H L H L L H 7 L HH HH L H L 8 H LLL H L H H 9 H L L HHH L L INPUTS OUTPUTS CLOCK A CLOCK B CLEAR QA QB QC QD X X H LLL L X L BINARY COUNT UP X L QUINARY COUNT UP Note: * Output QA is connected to input CLOCK B for BCD count. ** Output QD is connected to input CLOCK A for bi-quinary count. INPUT AND OUTPUT EQUIVALENT CIRCUIT M54/M74HC390 2/13 |
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Similar Description - M74HC390B1R |
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