CD14538B: CD14538B

ollivier MAUREL

Prodigy 40 points

Part Number: CD14538B

Tool/software:

Hello,

my application uses CD14538BF3A part.

We currently use original parts manufactured with Date code 1630. and Bought from ARROW, official TI distributor.

We detect application failures because we measure 10 Ohms (Ten Ohms) between Pin 1 ( Cx1) and Pin 8 (Vss) . The same measurement 10 Oms between Pin 15 ( Cx2) and Pin 8 (Vss) .

According to Component logic diagram we find in the datasheet (from 2003), we should expect a measurement of 0 Ohms (Zero Ohms) because it seems to be short cut between Pin 1 v/s Pin 8 and Pin 1 v/s Pin 15.

My question : Do you think the measurement of 10 Ohms is OK according to the diagram ? Or we really should measure 0 Ohm ?

Maybe it exists a more recent datasheet in which this measure should be justified ? ( I don't find any more recent datasheet from 2003)

Thanks for your support.

Best Regards,

Ollivier.

8 months ago

0 Clemens Ladisch 8 months ago

Guru 316690 points

The datasheet does not guarantee any specific resistance between Cx and Vss.

What is the failure in the actual application? Please describe the wrong behaviour.

0 ollivier MAUREL 8 months ago in reply to Clemens Ladisch

Prodigy 40 points

Hello Clemens,

thanks for your feedback.

I'm not able to explain the application issue (confidential). My request was just on the specific resistance between Cx and Vss in order to know expected value.

I'm aware that specific resistance between Cx and Vss is not mentioned to the datasheet so not guaranteed. That's my concern .

Thanks again.

Ollivier

0 Albert Xu1 8 months ago in reply to ollivier MAUREL

TI__Mastermind 37845 points

Hi Ollivier,

This isn't something that we specify.

Are you not able to let us know what the issue your customer is seeing? Otherwise, it's a bit hard to help debugl.

Logic

Logic forum

CD14538B: CD14538B