CD54AC161: CLLCC vs CerDip Package Performance Difference

Vito Greco

Prodigy 20 points

Part Number: CD54AC161

For content reference we have historically been using the SN (CCLLC package) version on the CD54AC161F3A (CerDip) and are seeing some higher current measurements.
Operating voltage is +5 VDC
- SN54AC 161 (CCLLC) current draw 10-15 mA
- CD54AC161F3A (CerDip) is in our new design and being used for an identical application, but these chips are drawing ~25 mA.

We were told that both packages are identical dies.
1. Can you speak to any idea of why the CD chip would draw more current?

Has there been a Fab change where these parts are manufactured?

Has there been any process changes?

over 6 years ago

0 Wade Vonbergen over 6 years ago

TI__Guru 62930 points

Vito,
Can you provide me with the orderable part numbers that you are comparing?
We do not have a SN54AC161.

There is/was an 54AC161 that was a National device that TI acquired. Possibly this is the device you are referring to?
If you can give me better description of the non CD54AC161, I should be able to look it up.

Regards,
Wade

0 Vito Greco over 6 years ago in reply to Wade Vonbergen

Prodigy 20 points

Wade,

The SN54AC161 is now obsolete, and yes the National part that TI aquired.

0 Wade Vonbergen over 6 years ago in reply to Vito Greco

TI__Guru 62930 points

Sorry, I missed this reply.
Since the devices are of different origin, it would make sense that they have different static currents.
I don't have access to the datasheets to do a compare from the specification standpoint.

Regards,
Wade

Logic

Logic forum

CD54AC161: CLLCC vs CerDip Package Performance Difference