Other NXP ProductsのトピックRe: How to connect PCA9509

How to connect PCA9509

Yasoga — Tue, 13 Jul 2021 09:54:39 GMT

Hi,

Is it possible to use PCA9509 side by side serially?

Re: How to connect PCA9509

JozefKozon — Tue, 13 Jul 2021 11:48:05 GMT

Hi Yasumasa Ogawa,

I am not sure if serial connection of two PCA9509 is possible. The PCA9509 was not intended for such connection. Only way possible could be to connect the B ports together and I2C ICs on the A ports.

Could you please provide more details about your application? Perhaps we can offer you a better component for your application.

With Best Regards,

Jozef

Re: How to connect PCA9509

Yasoga — Wed, 14 Jul 2021 00:05:03 GMT

To Jozef

thank you for your answer.
Insert the board into the subrack.
I2C communication between boards.
Since it passes through the backboard, I am thinking of mounting an I2C repeater on each board.
Best Regards

Re: How to connect PCA9509

JozefKozon — Wed, 14 Jul 2021 05:54:36 GMT

Hi Yasumasa Ogawa,

thank you for your answer.

Could you please draw a sketch about the connection?

With Best Regards,

Jozef

Re: How to connect PCA9509

Yasoga — Wed, 14 Jul 2021 06:29:13 GMT

To Jozef

thank you for your answer.

I will send you a sketch.
Best Regards

Re: How to connect PCA9509

JozefKozon — Wed, 14 Jul 2021 07:16:43 GMT

Hi Yasumasa Ogawa,

I think it is possible to use our PCA9509 in the configuration you provided in the sketch.

With Best Regards,

Jozef

Re: How to connect PCA9509

Yasoga — Wed, 14 Jul 2021 07:49:02 GMT

To Josef

thank you for your answer.
relieved.

Best Regards