The Jingxun 863M wireless earphone chip manual describes features, technical parameters and basic operation of the transmitter and receiver.
The 863M chip integrates both transmitter and receiver functions on a single PLL‑based design, offering stable frequency, multiple channel selection, stereo encoding, and built‑in charging control. The transmitter requires only a control chip and PLL, while the receiver needs only a stereo decoding chip, keeping the circuit simple and low‑cost. Transmission range exceeds 200 m.
The manual provides detailed technical specifications such as operating voltage (2.2‑5.5 V), current consumption (≤3 mA CPU, ≤80 mA TX, ≤60 mA RX), and charging behavior (0.2 C charge current, stop at 2.8 V or 6 h). It also explains basic operation steps for powering on, frequency switching, signal detection, mute control, and charging modes. This manual is written in Chinese.
| Operating frequency | 863 MHz, 3 channels, 0.5 MHz bandwidth each |
|---|---|
| CPU operating voltage | 2.2 V – 5.5 V |
| CPU operating current | ≤ 3 mA |
| Operating temperature range | -20 °C to +70 °C |
| Receiver sensitivity | < -105 dBm |
| Stereo separation | > 35 dB (1 kHz input, 30 kHz offset) |
| Frequency response | < 3 dB (60 Hz – 15 kHz) |
| Transmit power | > 10 mW |
| Transmit current | < 80 mA |
| Receive current | < 60 mA |
| Charging current | 0.2 C (e.g., 440 mA for 2200 mAh battery) |
The transmission distance can exceed 200 meters.
When a rechargeable battery is detected, the charging indicator lights up and the chip supplies a 0.2 C charging current until the battery voltage exceeds 2.8 V or charging time reaches 6 hours.
The transmitter detects the receiver’s battery, turns off its power indicator, and enters charging mode.