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应用中使用RS232转RS485的电路，目前出现小批量中，SN74HC04D异常导致无法通讯。更换后可恢复正常，请问需要怎么优化和导致的原因是什么呢？
建议您将这个问题发到其他模拟器件论坛，会有专门负责逻辑的工程师回复您。
