SN74CB3Q3257: SPI Use Case

Vibhu Vanjari

Genius 11900 points

Part Number: SN74CB3Q3257

Hello,

Can I use this part as a MUX and DEMUX at teh same time. For my use case I have two masters and a slave. I need to have three lines the MOSI, SS, CLK muxed (Two master inputs and one output to the slave) while I have the MISO demuxed (1 slave input and 2 outputs to masters). Is it okay to use this part to do both of these simultaneously?

Thanks,

Vibhu

over 4 years ago

0 Clemens Ladisch over 4 years ago

Guru 244980 points

This is OK. All channels are independent, and analog switches do not even care about the direction in which the current flows.

0 Ambroise Suter over 4 years ago

TI__Expert 3820 points

Hi Vibhu,

As clemens mentioned all our multiplexers can be used for multiplexing and demultiplexing. This device open/closes all lanes at the same time, so it should suit your application.

Nevertheless we recommend you to use our new TMUX1574. It is pin 2 pin compatible and offers multiple new features like 1.8V Logic control, Fail-safe logic powered off protection and more/

Best regards,

Ambroise

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SN74CB3Q3257: SPI Use Case