Part Number: CD74HC4051
您好,物料批次2445+的,请问这个物料引脚有点发黑,是跟引脚镀层有关系吗?如是镀层原因,这个是什么镀层
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Part Number: CD74HC4051
您好,物料批次2445+的,请问这个物料引脚有点发黑,是跟引脚镀层有关系吗?如是镀层原因,这个是什么镀层