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TDA2HG: "RSTOUTN" (F23 PIN) 的内部结构

Part Number: TDA2HG


"RSTOUTN"(F23 PIN)脚在外部同时有上拉(3.3V)和下拉的情况下,测得该脚的电压仍为3.3V,不太能理解。请问这个PIN脚的内部电路是怎么样的?