SN74HC139: Discolouration Of Leads.

We received the parts but there is discoloration of lead, see attached picture.

May I ask if this is a quality issue? Or its own color? Thank you!

DISCREPANCY:Discolouration Of Leads.

Kailyn Chen：

Hello，

Please refer to this FAQ: [FAQ] Why do the leadframes look strongly oxidized or corroded? 

Any other  questions， please contact me again。