Seeking Recommendations: 8-Channel Unidirectional 3.3V to 5V Level Shifter Chips

Newbie Guide Basic Q&A
1

Hi everyone,

I’m looking for recommendations for an 8-channel, unidirectional logic level shifter to translate from 3.3V to 5V.

I’m very familiar with common 8-channel bi-directional transceivers like the TXS0108, but that’s not what I need for this application. My requirement is strictly one-way (3.3V in, 5V out).

I’m preferably looking for a straightforward chip, ideally with a clean pinout (e.g., all inputs on one side and all outputs on the other).

It’s been a while since I’ve had to source a part like this, so I’m a bit out of the loop on the current “go-to” model numbers.

What parts would you recommend for this task?

Thanks in advance!

2

For single power supply: HCT244 245 541
For dual power supply: LVC4245

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For a single route that doesn’t require high speed, isn’t it sufficient to just use MOS to set up and convert? :thinking:

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4

“They are 8-channel, 8-channel. Are you using a big lump of discrete components?”

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5

MOSFETs are expensive, so I always use transistors and haven’t encountered any issues. Alternatively, a diode works too—just add a pull-up resistor to the 5V pin. I use all these for UART level matching with Bluetooth or 4G modules, and so far, there have been no problems with the 115200 baud rate.

6

Thank you all.
I’ve chosen the SN74HCT245PWR, which is powered by 5V and can recognize a high level at 2V—perfect for my use case.
I don’t build the circuit myself because there are 24 channels; an integrated circuit is the only option.

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