NVT2008PW -> SPI (3.3v to 5V)

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NVT2008PW -> SPI (3.3v to 5V)

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mvdm85
Contributor I

I'm considering using the NVT2008P for an application involving the conversion of logic levels between SPI devices, from 5V to 3.3V. I'm aware that the NVT2008P is commonly used for I2C logic level conversion, so I assume it can also work for SPI due to the similar tri-state requirements of I2C.

I'm seeking guidance on the correct circuit design. Currently, I have two 5V and two 3.3V devices connected to a 3.3V Master.

My plan is to connect the CLK, MISO, and MOSI pins of each 3.3V Slave device to both the Master and the NVT2008PW. Similarly, I'll connect the CLK, MISO, and MOSI pins of each 5V Slave device to both the Master and the NVT2008PW. This setup will establish separate 3.3V and 5V buses. I intend to use the remaining pins on the NVT2008PW to translate the CE/Reset/Interrupt signals from 5V to 3.3V.

3.3V_SPI_5V.PNG

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TomasVaverka
NXP TechSupport
NXP TechSupport

Hello Michaël,

Yes, the NVT2008PW is suitable for SPI, your proposed setup seems reasonable to me.

BR, Tomas

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