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SN74LVC1G04: The SN74LVC1G04DCKR chip X-rays of different years are different

Part Number: SN74LVC1G04

Dear sir,

  I bought SN74LVC1G04DCKR    21+ of this product before, but now I have bought a batch of 22+ of this product. The result of Xray scanning is different. Is it normal? What is the normal cause of this? Are purchased through regular channels. See the picture below please。

Thanks