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您好,SN65LBC184 有thermal shutdown 保护电路,防止总线竞争,一旦启动了热保护,输出disable,直到温度降下来之后才能恢复到正常状态。
所以当总线上有两个485 driver的时候,一旦发生总线竞争,thermal shutdown 电路将会disable output, 应该也不会对器件造成损坏。