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TXB0104: 使用上有些问题

Part Number: TXB0104


1、手册中建议引脚上拉/下拉电阻大于50k,这里的电阻是否包含OE引脚;

2、在使用TXB0104作为串口转换时(3.3V信号转换为1.8V信号),在输入为1.8V时输出信号的高电平为3.3V,但低电平超过了0.8V,没有找到可能的原因,有什么建议吗,谢谢