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Hi Experts,
I'm working through a new design and am looking to replace the auto bi-directional level translator device used in the previous design (TXB0106) with a comparable direction controlled device. I have come across the SN74LVC8T245 device which looks like it may be a good option, but would like your input before settling upon it. Only 6 channels are needed, so 2 of them on the 8-bit SN74LVC8T245 device would not be used and left unconnected.
In the design, side B will be a 5V level input to the device coming from a quadrature encoder. Side A will be a 3.3V level output going to a C2000 MCU purposed for its quadrature encoder peripheral (eQEP).
Please let me know your thoughts on this and if you have any suggestions. I can provide schematic images for clarity as well if needed.
Thanks,
Kevin
Hi Clemens,
Thank you for your reply and mentioning the unused connections. I had missed that and will tie unused channels to GND or PWR.
The SN74AHC541 seems like it would be a good option. Reviewing the datasheet it looks like it can step down signals ranging from 2V - 5.5V down to 3.3V without needing a separate supply voltage, is that correct? That would be good to have in the case where a 3.3V encoder is used instead of 5V.
Below is a snip from my schematic, would appreciate if you get a chance to take a look. 3.3V will be the MCU power.
Thanks
Kevin
