【摘 要】
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一些杂志和资料,经常提请读者注意:集成电路与非门不用的输入端不能悬空,必须根据逻辑上的要求接“1”或接“O”电位。不少单位在使用这些器件时也都如此应用,他们考虑的主
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一些杂志和资料,经常提请读者注意:集成电路与非门不用的输入端不能悬空,必须根据逻辑上的要求接“1”或接“O”电位。不少单位在使用这些器件时也都如此应用,他们考虑的主要是防止干扰从悬空端侵入。但我们在调试印花机控制器时碰到这样一种情况(如下图):门1的输入端D接“0”,照理输出该是“1”,但用万用表一量是“0”,以为门
Some magazines and information often draw the reader’s attention: The integrated circuit and the unused input terminals can not be left floating. They must be connected to “1” or “O” potential according to the logic requirements. Many units use these devices as well, and their main consideration is to prevent interference from intruding into the air. But we debug printer controller encountered such a situation (as shown below): the input terminal D 1 “0”, the rational output is “1”, but with a multimeter is a “0”, that door
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