Hobbywing Xrotor 40A ESC for DIY Multicopter Drone

Specification	Details
Channels	4 Independent Channels
High Side Voltage (HV)	5V (Typical)
Low Side Voltage (LV)	3.3V (Typical)
MOSFET Type	BSS138 (or equivalent)
Interface	Bi-Directional
Dimensions	15.5mm x 13mm

Price

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₹ 2,288.14 ~~₹ 2,999.00~~

(Tax included)

Barcode: 6431081

Product Description

This compact module uses a specialized MOSFET-based circuit to shift logic levels. When a signal is sent from the low-voltage side, the MOSFET allows the high-voltage side to "see" that signal safely, and vice-versa. It features standard 0.1" pitch headers, making it perfectly compatible with breadboards and standard jumper wires.

Key Features

True Bi-Directionality: Automatically detects the direction of data flow, making it compatible with I2C, SPI, and UART serial communications.
Independent Channels: Four separate channels allow you to shift multiple signals (like SDA and SCL for I2C plus two extra GPIOs) using a single module.
High-Voltage Tolerance: Safely handles the transition between 3.3V and 5V, which are the two most common voltages in modern hobbyist electronics.
Breadboard Friendly: The small footprint and standard pin spacing make it easy to integrate into any prototyping setup.
Efficiency: Uses minimal power and has a high switching speed suitable for most standard microcontroller communication frequencies.

Technical Details

HV Pin: Connect to the higher voltage source (e.g., 5V).
LV Pin: Connect to the lower voltage source (e.g., 3.3V).
GND Pin: Must be common to both systems.

Prototyping and Engineering Tips from Robogears

Common Ground is Mandatory: For the shifter to work, you must connect the ground (GND) from your 5V controller and the ground from your 3.3V sensor to the GND pins on this module. Without a common ground, the logic levels will be "floating" and communication will fail.
I2C Pull-ups: This specific MOSFET design often includes internal 10kΩ pull-up resistors. If you are using this for I2C and already have pull-ups on your sensors, the combined resistance might be too low for very long wires.
Speed Limits: While excellent for I2C (up to 400kHz) and standard UART, MOSFET-based shifters can struggle with extremely high-speed SPI (above 2MHz) due to the "rise time" of the signal. If your high-speed display is flickering, consider a dedicated high-speed IC like the 74HCT125.
Directional Labels: Always double-check your wiring: HV goes to the 5V side and LV goes to the 3.3V side. Swapping these won't necessarily blow the chip instantly, but it will prevent the level shifting from working.

Package Includes

1 x 4-Channel Bi-Directional Logic Level Converter
2 x 6-Pin Male Headers (May require soldering)

Disclaimer

This module is intended for logic signals only. Do not attempt to use it to "step up" or "step down" power for motors or high-current devices, as the MOSFETs are not designed for power transmission.

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