Bi-directional level shifter for connecting 5V controllers to 3.3V sensors, displays, flash storage, and modules. Auto-detects signal direction. Not suitable for I2C or other open-drain buses; use a dedicated I2C level shifter for those interfaces.
A-side low-voltage reference supply
bidirectional level-shift channel 1, low-voltage side
bidirectional level-shift channel 2, low-voltage side
bidirectional level-shift channel 3, low-voltage side
bidirectional level-shift channel 4, low-voltage side
output-enable input
B-side high-voltage reference supply
bidirectional level-shift channel 1, high-voltage side
bidirectional level-shift channel 2, high-voltage side
bidirectional level-shift channel 3, high-voltage side
bidirectional level-shift channel 4, high-voltage side
common ground
| Pin | Position | Type | Function | Voltage |
|---|---|---|---|---|
| LV | left-1 | Power | A-side low-voltage reference supply | 1.2V to 3.6V per visible board text/datasheet family |
| A1 | left-2 | Analog | bidirectional level-shift channel 1, low-voltage side | |
| A2 | left-3 | Analog | bidirectional level-shift channel 2, low-voltage side | |
| A3 | left-4 | Analog | bidirectional level-shift channel 3, low-voltage side | |
| A4 | left-5 | Analog | bidirectional level-shift channel 4, low-voltage side | |
| OE | left-6 | GPIO | output-enable input | |
| HV | right-1 | Power | B-side high-voltage reference supply | 3V to 5V per visible board text/datasheet family |
| B1 | right-2 | GPIO | bidirectional level-shift channel 1, high-voltage side | |
| B2 | right-3 | GPIO | bidirectional level-shift channel 2, high-voltage side | |
| B3 | right-4 | GPIO | bidirectional level-shift channel 3, high-voltage side | |
| B4 | right-5 | GPIO | bidirectional level-shift channel 4, high-voltage side | |
| GND | right-6 | Ground | common ground | 0V |
A-side low-voltage reference supply
bidirectional level-shift channel 1, low-voltage side
bidirectional level-shift channel 2, low-voltage side
bidirectional level-shift channel 3, low-voltage side
bidirectional level-shift channel 4, low-voltage side
output-enable input
B-side high-voltage reference supply
bidirectional level-shift channel 1, high-voltage side
bidirectional level-shift channel 2, high-voltage side
bidirectional level-shift channel 3, high-voltage side
bidirectional level-shift channel 4, high-voltage side
common ground
BSS138/PCA9306 I2C shifters, TXB0104/TXS0108E auto-direction translators, 74LVC245/74AHCT125 buffers, and 12V-to-3.3V converters — matched to bus type and direction, not channel count.
2-Channel Level Converter (12V to 3.3V) visual preview2-Channel Level Converter (12V to 3.3V)
2-Channel Level Converter (12V to 5V) visual preview2-Channel Level Converter (12V to 5V)
4-channel I2C-safe Bi-directional Logic Level Converter visual preview4-channel I2C-safe Bi-directional Logic Level Converter
4-Channel Level Converter (12V to 3.3V) visual preview4-Channel Level Converter (12V to 3.3V)
4-Channel Level Converter (12V to 5V) visual preview4-Channel Level Converter (12V to 5V)
74AHCT125 - Quad Level-Shifter (3V to 5V) visual preview74AHCT125 - Quad Level-Shifter (3V to 5V)
74AHCT14 - Logic Level Inverter / Level Shifter visual preview74AHCT14 - Logic Level Inverter / Level Shifter
74LVC245 - Breadboard Friendly 8-bit Logic Level Shifter visual preview74LVC245 - Breadboard Friendly 8-bit Logic Level Shifter
8-channel Bi-directional Logic Level Converter visual preview8-channel Bi-directional Logic Level Converter
Adafruit QT 3V to 5V Level Booster Breakout - STEMMA QT / Qwiic visual previewAdafruit QT 3V to 5V Level Booster Breakout - STEMMA QT / Qwiic
Adafruit QT 5V to 3V Level Shifter Breakout - STEMMA QT / Qwiic visual previewAdafruit QT 5V to 3V Level Shifter Breakout - STEMMA QT / Qwiic
Fermion: TXS0104E 4-Bit Level Translator (Breakout) visual previewFermion: TXS0104E 4-Bit Level Translator (Breakout)
10W Super Bright LED - Violet visual previewWS2812/SK6812 NeoPixel strips, rings and Jewels, APA102 DotStar pixels, and plain analog RGB strips — each matched to its protocol and host, not just its connector.
Components · Addressable LEDs · 180 parts
18-Channel 8-bit PWM LED Driver w/ I2C Interface visual preview74HC logic gates, MCP3008/MCP23017 ADCs and expanders, 24LC256 EEPROM, 4N25-series optocouplers and ULN2803A drivers — bare DIP chips with no breakout-board conveniences like pull-ups or level shifting.
Components · Integrated circuits · 68 parts
10-bit ADC (SPI) visual previewADS1115/MCP3421 ADCs, MCP4725 and GP8413 DACs, CP2102 USB-UART boards, and I2C plumbing like the LTC4316 address shifter — matched to bus, resolution and signal range.
Components · Interface converters · 114 parts
256MB Micro SD Memory Card visual preview24LC32/25LC256 EEPROM, I2C FRAM, 64Mbit PSRAM, and microSD breakouts up to 64GB — matched to write frequency and data volume, not just interface.
Components · Memory & storage · 39 parts