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https://e2e.ti.com/support/interface-group/interface/f/interface-forum/984224/max3232-connect-rin-to-gnd-if-unused
大家好、
如果客户不使用 RIN2、您的建议 将保持悬空。 如果客户将 RIN2连接到 GND、是否存在任何问题？
https://e2e.ti.com/support/interface/f/interface-forum/703430/max3232-max3232-not-used-pin-configuration/2592968
此致、 Koyo
科约
两个 Rin 引脚上都有内部下拉电阻、因此可以从外部将它们连接到 GND。
此致、
Eric Hackett
