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DM74LS93 Arkusz danych(PDF) 6 Page - National Semiconductor (TI) |
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DM74LS93 Arkusz danych(HTML) 6 Page - National Semiconductor (TI) |
6 / 10 page Function Tables LS90 BCD Count Sequence (See Note A) Count Output QD QC QB QA 0L L L L 1L L L H 2L L H L 3L L H H 4L H L L 5L H L H 6L H H L 7L H H H 8H L L L 9H L L H LS90 Bi-Quinary (5-2) (See Note B) Count Output QA QD QC QB 0 LLL L 1 LLL H 2L L H L 3L L H H 4 LHL L 5H L L L 6H L L H 7 HLH L 8 HLH H 9H H L L LS93 Count Sequence (See Note C) Count Output QD QC QB QA 0L L L L 1L L L H 2L L H L 3L L H H 4L H L L 5L H L H 6L H H L 7L H H H 8H L L L 9H L L H 10 H L H L 11 H L H H 12 H H L L 13 H H L H 14 H H H L 15 H H H H Note A Output QA is connected to input B for BCD count Note B Output QD is connected to input A for bi-quinary count Note C Output QA is connected to input B Note D H e High Level L e Low Level X e Don’t Care LS90 ResetCount Truth Table Reset Inputs Output R0(1) R0(2) R9(1) R9(2) QD QC QB QA HH L X L L L L HH X L L L L L XX H H H L L H X L X L COUNT L X L X COUNT L X X L COUNT X L L X COUNT LS93 ResetCount Truth Table Reset Inputs Output R0(1) R0(2) QD QC QB QA HH L L L L L X COUNT X L COUNT 6 |
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