SN74HC08: PIN OXIDATIVE BLACKENING on SN74HC08N SN74HC14N

Julia Zhu

Part Number: SN74HC08

SN74HC08N SN74HC14N you see the pic as below, OUR CUSTOMER IS CHALLENGING WE BOUGHT FAKE CHIPS,SO PLEASE HELP US AND LET US KNOW WHAT HAPPENED

0 Clemens Ladisch over 2 years ago

Guru 243220 points

0 Julia Zhu over 2 years ago in reply to Clemens Ladisch

and I just wonder why PIN OXIDATIVE BLACKENING showned on pic of SN74HC08N SN74HC14N,that is why our customer is asking whether we buy real TI.

0 Clemens Ladisch over 2 years ago in reply to Julia Zhu

Guru 243220 points

These are real chips. DIP packages from TI have been using roughened leadframes for several years.

0 Julia Zhu over 2 years ago in reply to Clemens Ladisch

So you mean PIN OXIDATIVE BLACKENING of chips showned this pic is normal?

+1 Clemens Ladisch over 2 years ago in reply to Julia Zhu

Guru 243220 points

Yes, this is normal.

There is no oxidation; the pins look darker because the surface is not smooth and reflects less light (see this application note).

0 Julia Zhu over 2 years ago in reply to Clemens Ladisch

Thanks a million Clemens for your excellent support

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