Can I use a 3.3V logic microcontroller with a sensor module that specifies a 5V operating voltage?

[Oween]

es, you can connect a 1.8 V micro controller to a 3.3 V peripheral using the but you must configure it properly to ensure reliable operation.

Here’s what you need to know:

Voltage Compatibility

The supports bidirectional translation between 1.2 V and 3.6 V voltage domains. This means it can comfortably handle a 1.8 V ↔ 3.3 V level interface.

Direction Control (DIR) Pin

This chip does not automatically detect the direction of data flow. You must manually set the DIR pin:

• DIR = Low: data flows from the B-side (higher voltage, e.g., 3.3 V) to the A-side (lower voltage, e.g., 1.8 V).

• DIR = High: data flows from A → B.

Output Enable (OE)

The OE pin must be driven low to activate the outputs. If OE is high, the outputs enter a high-impedance (Hi-Z) state, and no data is passed.

Layout Tips

Place a 0.1 µF decoupling capacitor close to the device to maintain voltage stability and prevent signal glitches, especially at higher speeds.

Bottom line: Yes, the SN74AVC2T245RSWR is suitable for 1.8 V ↔ 3.3 V interfacing. Just be sure to set DIR correctly, pull OE low, and include proper decoupling to ensure signal integrity.

For more details or to quote the exact part, visit the product page for the SN74AVC2T245RSWR dual-channel level shifter on Kasuo Electronics