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https://e2e.ti.com/support/sensors-group/sensors/f/sensors-forum/659041/tmp421-any-difference-between-pn--g4-and-non-g4
TMP421AIDCNRG4和 TMP421AIDCNR 之间是否有任何差异？
G4旨在表明此型号符合无铅和其他"绿色环保"要求。 但是、我们的所有器件现在都满足这些要求。 保留 G4设备以实现兼容性。
有关详细信息，请参阅此帖子：
e2e.ti.com/.../2659.what-does-g4-in-ti-part-numbers-mean
谢谢、 任
