ka3842、uc3842、和utc3842的引脚功能都一样吗？ UC3842和KA3842是不是一样的?
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这三个块引脚功能都一样，只是生产广家不同而己，若您这三个块比如(KA3842后面带有字母时，那就有点区别了。
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