The HW-044 datasheet provides information on the component's applications, including:
Connects strictly to the Negative (-) terminal of the 3.7V Lithium battery.
Even with a complete datasheet, issues can arise. Here are the most common problems and solutions.
| Parameter | Value / Range | |-----------|----------------| | Number of channels | 8 | | Low voltage side (LV) | 1.8V – 5V (typically 3.3V) | | High voltage side (HV) | 2.8V – 6V (typically 5V) | | Max signal frequency | ~100 kHz – 200 kHz (safe for I²C, SPI up to a few hundred kHz) | | Logic type | Open-drain / push-pull (works with both, best with open-drain) | | Direction | Bidirectional per channel, automatic | | Input voltage for LV side | Provided externally via "LV" pin | | Input voltage for HV side | Provided externally via "HV" pin | | Typical application | I²C, UART, GPIO, one-wire buses | | Common IC used (on board) | BSS138 N-channel MOSFET + pull-up resistors (4.7kΩ or 10kΩ) | hw-044 datasheet
If the load connected to OUT+ and OUT- draws more than 3A, the MOSFETs immediately open the circuit to prevent a thermal runaway event. LED Status Indicator Meanings
// Apply deadzone if (abs(xDiff) < deadzone) xDiff = 0; if (abs(yDiff) < deadzone) yDiff = 0;
The HW-044 is a workhorse component in the maker and prototyping world. While you may never find a single, bound PDF titled "hw-044 datasheet" from a major semiconductor brand, the information exists across component-level documentation and community testing. This guide has consolidated all essential data: electrical specs, pinout, wiring diagrams, code examples, mechanical dimensions, and application advice. The HW-044 datasheet provides information on the component's
Here is a simple sketch to test your HW-044.
Since you cannot download a specific datasheet, here is what you need to know for hardware integration and potential alternatives.
In the vast majority of contexts, especially among Arduino and electronics hobbyists, "HW-044" refers to an . Its core function is to enable communication between modern microcontrollers, which operate on TTL logic levels (0V and 3.3V/5V), and older equipment that uses the RS232 standard (typically ±12V). | Parameter | Value / Range | |-----------|----------------|
Note: Standard Arduino Uno does not support I²S natively on all pins. Use an Arduino Due or Zero for best results, or a software bit-banging library.
// Center calibration (replace with your values) int centerX = 512; int centerY = 512;
Approx. 32 mm x 28 mm (Excluding the overhanging DB9 connector footprint) Pinout Configuration and Interface Description
As you've discovered, finding a single, unified hw-044 datasheet is impossible. Your path to technical documentation depends entirely on which module you have.