CD4541B: Datasheet Clarification

Renan Santos Adriano

Mastermind 20460 points

Part Number: CD4541B

Hi Team,

My Customer would like to know if the datasheet of CD4541B has an error on page 4 on the Transition Time Parameter? Since this Parameter has two tTHLs on the table (picture below).

Looking forward to your inputs.

Regards,
-Renan

over 6 years ago

0 Clemens Ladisch over 6 years ago

Guru 298420 points

This is obviously an error. It is already found in the original datasheet.

I suspect that the low-side drivers are stronger, but I guess by now, the only way to find out which is t_THL and which is t_TLH is to take a chip and measure it.

CD4541B Harris.pdf

0 Renan Santos Adriano over 6 years ago in reply to Clemens Ladisch

TI__Mastermind 20460 points

Hi Clemens,

Thank you for your reply.

Can you provide the correct information on this device? Which is for tTHL and which is tTLH?

I do apologize I don't have the component on hand.

Regards,
Renan

0 Clemens Ladisch over 6 years ago in reply to Renan Santos Adriano

Guru 298420 points

I don't have it either.

0 Dylan Hubbard over 6 years ago in reply to Clemens Ladisch

TI__Mastermind 45135 points

Hi Renan,

I think its safe to say the bottom of the two is TTLH. The low side drivers are stronger meaning a High to Low transition would be quicker. I also glanced at other similar parts designed by Harris to confirm. Worst case, you can use the larger value spec for both transitions to be safe if you don't have the capability to test. The load you have will impact these numbers as well.

Logic

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CD4541B: Datasheet Clarification