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购买的 OPA2376 芯片是否是假的



请教一下 TI 工程师,OPA2376AIDGKR  丝印 是 OBBI  ,封装是 MSOP-8 ,芯片的第一管脚标识是一个半圆的凹坑,芯片背面也没有任何丝印,是否TI有这样的封装?  之前用过的不是这个样子。