No, the TXU has unidirectional channels. It does not work with this SPI variant.
But as far as I can see, you need only one bidirectional signal. So use the SN74AXC1T45, and something like the TXU0102 for the other two signals.
The TXS has open-drain outputs; the high output voltage is generated by the internal 10 kΩ pull-up resistors. These are not strong enough to complete override the 10 kΩ pull-down in the CTL input.
Use a buffered, unidirectional translator…
Yes, unused outputs can be left open.
The TXB does not detect the direction, and has no direction. It is always bidirectional; the input and output buffers on both sides are always active.
For unidirectional signals, consider the TXU0102/TXU0202 instead…
TXB are designed for bidirectional signals, and thus have many restrictions and limitations.
What are the voltages and directions?
UARTs use unidirectional signals; consider the TXU0104/TXU0204/TXU0304/TXU0102/TXU0202.
Hey Nolan,
Buffers essentially redrives the signal for further downstream devices, which is especially useful over longer distances. You can see how much drive strength the device has by looking at IOH/IOL specs in the datasheets.
You are right that…
Part Number: TXU0104 Other Parts Discussed in Thread: TXU0102 , Hi Sirs,
May I tie 2 channels together to get a larger driving capability as below?
Thanks.
