PCA9548A tvdL(Data) and tvdH(Data) time value question

Johnny Guo

Other Parts Discussed in Thread: PCA9548A

Hi, team,

I found in PCA9548A datasheet that tvdL(Data) and tvdH(Data) time value is not aligned with picture showed in the same datasheet as below.

From Voltage waveform picture, tvdH(Data) > tvdL(Data), but in table, tvdH(Data) < tvdL(Data).

From general understanding, tvdH(Data) should be > tvdL(Data).

Which one is correct here?

Thanks.

Johnny

over 9 years ago

0 Siby James over 9 years ago

TI__Expert 5140 points

Hi Johnny,

This voltage waveform is not necessarily to scale as this does not show the high to low portion of the waveform. The measurement in the waveform only displays the low to high transition and not the high to low.

Thanks,
Siby

0 Johnny Guo over 9 years ago in reply to Siby James

TI__Expert 4910 points

Siby,

Do you mean only tvdH(Data) is corrent in waveform? And for tvdL(Data), is it like below time between red line?

Thanks.

Johnny

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PCA9548A tvdL(Data) and tvdH(Data) time value question