Dear,
SN74HC14PWR 我们有个问题。我们以前买的和现在买的X光片有区别。这正常吗？这个问题的原因是什么？
如图所示，一个芯片的图片是现在买的，两个芯片的图片是之前买的。我希望尽快收到您的回复
We have a question. There is a difference between what we bought before and what we buy now in X-ray. Is it normal? What is the reason for this problem?
As shown in the figure, one chip is now, and two chips are before。I hope to receive your reply as soon as possible
