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由于在选型时没有注意电源电压，选择了TXB0106PWR，我的是1.8V（B端）与1.2V（A端）双向电平转换，而1.2V是推荐使用的临界值，现PCB也已生产，使用是否有问题？？
您好，没有问题，1.2V<=VCCA<=3.6V，所以等于临界值都是可以的。
