NTB0104: Bidirectionality of individual pins

[stephen_craig]

Hi,

I'm using the NTB0104 to shift a SPI bus from 3.3v to 1.8v.  I'm wondering if all of the data pins, like some other voltage translators, need to be in the same direction. 

For example, can I have A0, A1, A2 as inputs, and A3 as an output, (and, correspondingly, B0, B1, B2 as outputs, and B3 a an input).

Thanks,
Stephen Craig

[guoweisun]

Hi Stephen

You can't use this device like your above description.

Hope this could help you!

[mcav]

Hi guoweisun

I want to use NTB0104 as a SPI level shifter. You have mentioned that we cant use this IC, some pin in one direction, while others in opposite direction. I am little bit confused. According to this site https://www.nxp.com/products/interfaces/ic-spi-i3c-interface-devices/ic-voltage-level-translators/du...  we can use NTB0104 in SPI application.

also in datasheet;

They give us one cell configuration. As I understand, each data line can be any direction.  In SPI; SCLK,MOSI,CS in one direction, MISO is in another direction. Could you help me: Can I use one NTB0104 for SPI connection.

Thank you

[stephen_craig]

Thanks for the quick reply. 

Regards,
Stephen Craig