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TI STORE购买的 SN74HC11N有相同问题
您好，如果是estore购买的，是没问题的，您看下这篇FAQ：关于针脚为什么看起来是被氧化了：
Roughened leadframes are an improvement to the older leadframe technology and provide improved solder adhesion.
这是工艺上的一种提高，有助于提高焊接的粘附度。
https://e2e.ti.com/support/logic-group/logic/f/logic-forum/718449/faq-why-do-the-leadframes-look-strongly-oxidized-or-corroded
