VC-02

Overview

The Ai-Thinker VC-02 is an SMD offline voice recognition module based on the US516P6 chip. It features a 32-bit RISC architecture with DSP, FPU, and FFT acceleration for high-reliability wake-up and recognition. The module supports up to 150 local commands in Chinese or English without internet connectivity. It operates on a 3.6V to 5V supply with current requirements exceeding 500mA. Key interfaces include UART1, I2C, PWM, SPI, and GPIOs. The package is a 20-SMD module measuring 18x17x3.2mm, designed for surface mount mounting within a -40°C to 85°C operating temperature range.

Feature Summary

• Offline voice recognition using US516P6 chip with no network dependency
• Supports up to 150 local commands in Chinese and English
• Integrated DSP, FPU, and FFT accelerator for signal processing
• Rich peripheral interfaces including UART, I2C, PWM, and SPI

Applications

• Smart home automation devices
• Voice-controlled lighting systems
• IoT consumer electronics requiring offline interaction

Procurement Notes

Verify the specific ordering suffix against the manufacturer's datasheet to confirm pinout compatibility and firmware version. Ensure power supply circuits can deliver peak currents above 500mA during voice processing to prevent brownouts. Confirm that the PCB layout adheres to the recommended RF and audio trace guidelines for the 20-SMD package to maintain signal integrity.

Selection Notes

Select the VC-02 when pure offline operation is required to ensure privacy and reliability without cloud connectivity. Compare it with the VC-01 if a different form factor is needed, noting the VC-02 uses a 20-SMD package while the VC-01 uses a 24-SMD package. Ensure the application environment stays within the specified -40°C to 85°C temperature range for optimal performance.

Part Context

The VC-02 belongs to Ai-Thinker's VC series of AI offline voice modules. It shares the same core US516P6 processor as other models in the series but differs in physical packaging and interface availability. It is often paired with ESP32 microcontrollers for complex IoT tasks, leveraging its dedicated voice processing capabilities while offloading general computing duties.

Replacement Considerations

The VC-01 is a related model from the same series but utilizes a 24-SMD package instead of the 20-SMD format. Direct substitution requires verifying mechanical fit and pin compatibility. No other direct cross-model replacements are documented in the provided sources.