SN74AHC541: Fan-out for SN74AHC541

Shuji Ishiwata

Mastermind 7035 points

Part Number: SN74AHC541

Hi All,

May we know what is the expected fan-out for SN74AHC541?

I confirmed the following comments on E2E.

(e2e.ti.com/.../3233187

" All CMOS families have a fan-out of 1000 or so, due to the high input impedance.
In practice, the fan-out is limited by the capacitive load (not only of the logic gate inputs, but also of the traces and connectors). "

Please tell me the output capacity of SN74AHC541.

Best Regards,
Ishiwata

over 4 years ago

0 Chad Crosby over 4 years ago

TI__Expert 6680 points

Hi Ishiwata,

Please allow us some time to gather this information with you.

Thanks!

0 Chad Crosby over 4 years ago in reply to Chad Crosby

TI__Expert 6680 points

Hi Ishiwata,

This device is indeed a CMOS device, with a drive strength similar to that of an HC device. The AHC family should have a fan out of around 1000 as well.

Thanks!

Chad Crosby

Logic

Logic forum

SN74AHC541: Fan-out for SN74AHC541