| 序号 | 型号 | 描述 | 大小 | 厂家Logo | 下载 |
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| 1 | HEF40193BT | COUNTER|UP/DOWN|4-BIT BINARY|CMOS|SOP|16PIN|PLASTIC | 120K |
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| 2 | HEF40193BT | 4-bit up/down binary counter | 124K |
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| 3 | HEF40193BTD | Synchronous Up/Down Counter | 168K |
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| 4 | HEF40193BTD-T | Synchronous Up/Down Counter | 168K |
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