4 Channel (I2C or SPI) 3.3V-5V Bi-Directional Logic Level Converter
4 Channel (I2C or SPI) 3.3V-5V Bi-Directional Logic Level Converter
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Looking to buy 4 Channel (I2C or SPI) 3.3V-5V Bi-Directional Logic Level Converter at the best price in India? Tech Depot India offers competitive pricing, bulk discounts for orders of 10+ units, and dedicated technical support via email and WhatsApp. Whether you are a hobbyist, student, or professional engineer, we have everything you need for your electronics projects.
Seamlessly bridge 3.3V and 5V logic devices with this compact 4-channel bi-directional logic level converter from Tech Depot India, Bengaluru. Designed for I2C, SPI, UART, and general GPIO level shifting, this module ensures safe, reliable communication between microcontrollers, sensors, and peripherals operating at different voltage levels.
Specifications
| Channels | 4 Bi-Directional |
| Low-Side Voltage (LV) | 1.8V - 3.3V |
| High-Side Voltage (HV) | 3.3V - 5V |
| Supported Protocols | I2C, SPI, UART, GPIO |
| Direction | Bi-Directional (both ways simultaneously) |
| Conversion Method | BSS138 N-Channel MOSFET with 10kOhm pull-up resistors |
| Max Data Rate | ~2 MHz (suitable for standard & fast-mode I2C) |
| Pinout | LV, LV1-LV4, GND | HV, HV1-HV4, GND |
| Board Dimensions | ~15mm x 13mm (compact breakout) |
| Header Pins | Included (may require soldering) |
| Operating Temperature | -40 degreesC to +85 degreesC |
| Type | Logic Level Shifter / Voltage Translator Module |
| Origin | Original/Authentic |
Why Choose 4 Channel (I2C or SPI) 3.3V-5V Bi-Directional Logic Level Converter?
100% Authentic
GST Invoice - A GST invoice is included with every order.
Expert Support - Dedicated technical help on WhatsApp and email.
Pan-India Delivery - Shipped across Bengaluru, Delhi NCR, Hyderabad and all of India.
Trusted by Makers - Used by students, hobbyists and professionals nationwide.
Key Features of 4 Channel (I2C or SPI) 3.3V-5V Bi-Directional Logic Level Converter
- True Bi-Directional Shifting: Each of the 4 channels converts signals in both directions simultaneously - ideal for I2C's open-drain SDA/SCL lines where master and slave both drive the bus.
- Safe Voltage Translation: Protects sensitive 3.3V devices (Raspberry Pi, ESP32, STM32) from 5V logic damage when interfacing with Arduino Uno, legacy sensors, or 5V displays.
- BSS138 MOSFET-Based Design: Uses proven N-channel MOSFET topology with on-board 10kOhm pull-up resistors for clean, reliable signal transitions.
- Multi-Protocol Compatible: Works with I2C (2 channels for SDA + SCL), SPI (4 channels for MOSI, MISO, SCK, CS), UART (TX + RX), or any combination of digital signals.
- Breadboard Friendly: Compact dual-inline form factor with clearly labeled pins drops directly into standard breadboards or perfboards.
- Wide Voltage Range: Low side supports 1.8V to 3.3V; high side supports 3.3V to 5V - covering virtually all common microcontroller voltage levels.
- No External Components Needed: Pull-up resistors are built in; simply connect your voltage references and signal lines.
- Essential building block for any mixed-voltage project - saves hours of debugging voltage incompatibility issues
How It Works
The module uses BSS138 N-channel MOSFETs on each channel along with 10kOhm pull-up resistors on both sides. When neither side drives the line low, pull-ups hold both sides high at their respective voltage levels. When the low-voltage side pulls a line low, the MOSFET's gate-source voltage turns it on, pulling the high-voltage side low as well. When the high-voltage side pulls low, the MOSFET's body diode and gate characteristics pull the low-voltage side low. This elegant design requires no direction pin and works automatically in both directions - making it perfect for I2C where both master and slave communicate on the same wires.
Wiring Guide
| Module Pin | Connection |
| LV | 3.3V supply from your low-voltage device (e.g., Raspberry Pi 3.3V pin) |
| HV | 5V supply from your high-voltage device (e.g., Arduino 5V pin) |
| GND (both sides) | Common ground - connect all device grounds together |
| LV1 - LV4 | Signal lines to/from 3.3V device |
Frequently Asked Questions
Is technical support available?
Yes, responsive support via email and WhatsApp for setup, troubleshooting, and application guidance.
Are bulk discounts available?
Yes, wholesale pricing on orders of 10+ units. Contact us via WhatsApp or email for a custom quote.
Customer Support
Email: techdepotindia@gmail.com
WhatsApp: Available for setup and troubleshooting help
Order your 4 Channel (I2C or SPI) 3.3V-5V Bi-Directional Logic Level Converter today and start building your next project.