Power
BSS138 Level Shifter
MOSFET-based bidirectional level shifter module used for I2C 3.3V/5V conversion.
Best For
Projects needing Level shifting and I2C with a commonly available power part.
Avoid If
You need production-grade certainty without checking the exact module vendor, pinout, and library maintenance status.
Quick Decision Notes
BSS138 Level Shifter is indexed as a power part from Generic. ChipScout tracks it by practical maker-facing dimensions: interfaces, library readiness, estimated price, field-level sources, and whether the page is strong enough for selection rather than only lookup.
Technical Specifications
Common Use Cases
- Maker prototypes
- Low-cost modules
- Educational hardware
Known Issues
- Breakout boards may use different pin labels or regulator choices
- Clone modules can differ from the original datasheet part
Interfaces and Library Support
Every field is meant to be source-backed. Corrections should include a datasheet URL, vendor page, module photo, or reproducible library test.
Submit correctionSource Resources
Pinout Table
Pinout is not yet source-verified. Use the table as an integration checklist, then confirm exact pins against the module vendor page before wiring hardware.
Common Wiring
Power the module from a rail that matches the breakout board, not just the bare IC.
Connect ground between the controller, sensor/module, and external power supply.
Use pull-ups appropriate for the board voltage; many modules already include them.
Keep wiring short for breadboard prototypes and lower bus speed if unstable.
Arduino Example
#include <Wire.h>
void setup() {
Serial.begin(115200);
Wire.begin();
Serial.println("BSS138 Level Shifter I2C wiring smoke test");
}
void loop() {
// Replace this with the maintained BSS138 Level Shifter library call.
Serial.println("Check BSS138 Level Shifter on the I2C bus, then read a sample.");
delay(1000);
}MicroPython Example
MicroPython support is pending. Treat community scripts as prototypes until a maintained driver is linked and tested on a known development board.
Recommended Development Boards
Low-cost Wi-Fi/BLE board with enough interfaces for most sensors and modules.
Good baseline for beginner wiring and library validation.
Practical MicroPython target for I2C, SPI, UART, PWM, and ADC experiments.
Alternative Model Reasons
Common Questions
What is BSS138 Level Shifter best used for?
Projects needing Level shifting and I2C with a commonly available power part.
Does BSS138 Level Shifter support Arduino or MicroPython?
BSS138 Level Shifter has verified Arduino support and MicroPython support pending verification.
What interfaces does BSS138 Level Shifter use?
BSS138 Level Shifter lists I2C, GPIO; wireless support is no wireless protocol.
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