SN74HC00: SN74HC00DR The pin is yellow

yingjiao LI

Part Number: SN74HC00

Tool/software:

Hi'

We found that the pin of this product is yellow, but it was always silver before. Could you please help confirm the reason
thank you

7 months ago

0 Albert Xu1 7 months ago

TI__Mastermind 28205 points

Hi,

You can refer to this FAQ: https://e2e.ti.com/support/logic-group/logic/f/logic-forum/718449/faq-why-do-the-leadframes-look-strongly-oxidized-or-corroded

This is most likely a combination of roughened leadframes and potentially a different material used.

0 yingjiao LI 7 months ago in reply to Albert Xu1

Expert 1195 points

However, we found that the color of DC24+ pin is silver, which is different from the color of 23+ pin I mentioned above, and the color of 23+ pin is yellow. What is the reason

0 Clemens Ladisch 7 months ago in reply to yingjiao LI

Guru 290820 points

The SOIC and TSSOP packages have multiple assembly sites, so it is indeed possible to get different lead finishes. The "Ordering & quality" table on the product page shows that you might get either NiPdAu or Sn.

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SN74HC00: SN74HC00DR The pin is yellow