TCA9511A: Maximum SCL clock frequency

Shuji Ishiwata

Mastermind 7825 points

Part Number: TCA9511A

Tool/software:

Hi All,

I have a question about the TCA9511A.

In 6.6 Timing Requirements below, it says min 400kHz.

If an SCL with a transmission speed of 400kHz or less is input, is there a chance that transmission will not be performed correctly?

Best Regards,
Ishiwata

3 months ago

0 Clemens Ladisch 3 months ago

Guru 316940 points

This is the guaranteed maximum. Writing it in the "MIN" column is correct.

As an example, consider three chips.
Chip A can handle all frequencies between 0 Hz and 432 kHz.
Chip B can handle all frequencies between 0 Hz and 400 kHz.
Chip C can handle all frequencies between 0 Hz and 456 kHz.
For all chips, the minimum frequency is 0 Hz. The chips have different maximum frequencies, but the maximum frequency that can be guaranteed for all chips is the smallest of these three values, i.e., the maximum frequency is at least 400 kHz, i.e., the minimum maximum frequency is 400 kHz.