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TPS22810: 如何确定芯片的哪个管脚是第1脚?

Part Number: TPS22810


Dears,

我有客户反馈 在贴片TPS22810DBVR (SOT23-6封装)时找不到定位标记,规格书中也无实物照片,应该如何确定芯片的哪个管脚是第1脚?

谢谢!