CD74HC4067: package option

KANJI SHIBATANI

Mastermind 6205 points

Part Number: CD74HC4067

Hello

My customer use analog MUX (competitor) MC74HC4067ADTR2G .

https://www.onsemi.com/pub/Collateral/MC74HC4067A-D.PDF

Our candidate is CD74HC4067SM96, but slightly big.

Do you have idea ?

Best Regards

over 7 years ago

0 Adam Torma over 7 years ago

TI__Mastermind 45475 points

Kanji,

Is your question asking if you can place the CD47HC4067SM96 on the footprint of MC74HC4067ADTR2G without any manufacturing issues?

Please allow me some time to check with someone who has experience with the manufacturing tolerances.

Thank you,
Adam

0 KANJI SHIBATANI over 7 years ago in reply to Adam Torma

Mastermind 6205 points

Dear Adam san

Thank you for your reply.

Yes, please let me know idea about footprint if available.

Thank you for your support

0 Adam Torma over 7 years ago in reply to KANJI SHIBATANI

TI__Mastermind 45475 points

Kanji,

There is some high risk mainly due to the difference in the width of the bulk (~4.4mm [E1] on the original, ~5.3mm on ours). The extra width takes out the landing area for the pins. Considering nominal values for everything and assuming perfect centering, see quick picture below, showing that the actual soldering area has been reduced to .2mm on each side:

If I use max width values (which, although unlikely, are still within spec), it gets downright impossible.

Thank you,

Adam

0 KANJI SHIBATANI over 7 years ago in reply to Adam Torma

Mastermind 6205 points

Dear Adam san

Thank you for your answer! I will talk customer to replaceing to CD74HC4067 for new design.

Best Regards

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CD74HC4067: package option