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关于电平转换芯片txb0108使得下级芯片发烫

Other Parts Discussed in Thread: TXB0108

我用txb0108在ARM9 S3C2440(3.3V)的八个数据口(DATA0~DATA7)和计数器8254-2(5V)的八个数据口做了一个转换,直接导致计数器8254-2严重发烫。这是为什么呢?