PCA9545 application

Nanfang Liao

Intellectual 2085 points

Hello All

My customer want to cascade two PCA9545, is this application OK? thanks

Regards,

Nanfang

over 10 years ago

0 Adam Torma over 10 years ago

TI__Mastermind 45720 points

Nanfang,

I will move this thread to the I2C forum where these PCA9545 I2C devices are supported.

Thank you,

Adam

0 Siby James over 10 years ago in reply to Adam Torma

TI__Expert 5140 points

Hi Nanfang,

There shouldn't be an issue with cascading two PCA9545 I2C switches, however I do want you to be aware that this isn't recommended. This is because the more slave devices you add to your channels, the more capacitance you will have on your bus. Also, there may be an issue of pullup strength depending on the number of devices throughout the I2C bus.

Hope this helps!
Siby

Interface

Interface forum

PCA9545 application