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数据搜索系统，热门电子元器件搜索 |
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数据搜索系统，热门电子元器件搜索 |
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DM74LS293 数据表(PDF) 4 Page - National Semiconductor (TI) |
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DM74LS293 数据表(HTML) 4 Page - National Semiconductor (TI) |
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4 / 6 page  Function Tables Count Sequence (See Note C) Count Outputs 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 C Output QA is connected to input B ResetCount Truth Table Reset Inputs Outputs R0(1) R0(2) QD QC QB QA HH L L L L L X COUNT X L COUNT H e High Level L e Low Level X e Don’t Care Logic Diagram LS293 TLF6423 – 2 Note The J and K inputs shown without connection are for reference only and are functionally at a high level 4 |
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