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请问TCA9509的QFN封装的版本，中间的那个热焊盘，是需要接地还是NC？
谢谢。
为了更好的散热提高性能，散热焊盘需要接地。
知道底部焊盘要连到PCB焊盘上散热，但是是要接地还是NC呢？
接地啊
