Timeline for I2C level shifter with only one reference
Current License: CC BY-SA 4.0
5 events
| when toggle format | what | by | license | comment | |
|---|---|---|---|---|---|
| Jan 23, 2023 at 16:11 | answer | added | Rohat Kılıç | timeline score: 4 | |
| Jan 23, 2023 at 15:28 | comment | added | brhans | Do the I2C signals on the 3.3V side have pullup resistors fitted? If they do then you can use the common single N-Channel MOSFET level shifter, since the MOSGET GATE is typically tied to the lower voltage Vdd. You would ofc need to use MOSFETs with a suitably low Vg-th to work with your 1.8V Vdd. And as already pointed out by ElectronicsStudent, you need a common ground reference between your 2 boards no matter what level shifting you do. | |
| Jan 23, 2023 at 15:16 | comment | added | ElectronicsStudent | You will at least need a GND-reference from the 3.3V board. If you have this, you can provide 3V3 locally by use of a step-up DC-DC - this allows to use a common level shifter. It would be easier though, to just use the exisiting 3V3 if somehow possible. | |
| S Jan 23, 2023 at 15:11 | review | First questions | |||
| Jan 23, 2023 at 15:13 | |||||
| S Jan 23, 2023 at 15:11 | history | asked | Ensiferum23 | CC BY-SA 4.0 |