SN74LVC3G34: Looking for a buffer for the SPI interface

Hi Roy,

There isn't a SPI specific buffer to recommend. I see that you have four signals going in one direction and one signal going the opposite direction. This means you can use a 4 channel buffer and then a single channel buffer to accomplish this. What family you choose will depend on the operating voltage. I expect the voltage to be around 3.3V in which the LVC family will be a good fit here. Here is a link to our parametric page in which you can filter through our buffer devices (I already filtered it down for you to find the appropriate device). AUP I recommend for 1.8 V and HC i recommend for 5 V.

www.ti.com/.../products.html

For the single channel buffer I recommend the SN74LVC1G34.

Hello, 

In addition to the recommendation above, there is a newly released device that is optimized for SPI buffering or level shifting:

https://www.ti.com/product/TXU0304 

https://www.ti.com/product/TXU0304-Q1 

It can support 1.1 to 5.5V supply configurations and can share a supply on both VCC rails for buffering or have different supplies on each VCCA and VCCB for level shifting SPI interfaces.

For even lower voltage applications down to 0.65V, you may also consider the following devices which can be configured for SPI interface directionality

https://www.ti.com/product/SN74AXC4T774 

https://www.ti.com/product/SN74AXC4T774-Q1 

For the most up to date recommendations on Level Translation devices by interface such as SPI, UART, etc... please refer to the following FAQ:
Are there voltage level translation / level shifter device recommendations for the industry standard interfaces like GPIO, SPI, UART, I2C, MDIO, RGMII, I2S etc?

Best,
Michael