I'm helping design an Arduino-ish add on board, and am trying to select a level shifter to make it safe to talk to the Pi.
I'm considering using some devices from TI similar to this:
and they come in two types:
Can you figure out which device (TXB series or TXS series) we need for the UART Serial comm (below) ?
Where "B" indicates buffered-type. Designed to exclusively be connected and interfaced with a push-pull CMOS driver and is capable of driving a capacitive or high impedance loads in applications such as Secure Digital (SD) or Serial Peripheral Interface (SPI). The TXB010x devices are not intended for use in open-drain applications.
Where the "S" indicates switch-type. Designed to interface with open-drain drivers and can be used in applications such as I2C.