The key role and types of Epson crystal oscillators in driving recorders

Sep 13,2024
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As one of the important accessories of modern vehicles, the driving recorder not only records the images during the driving process, but also provides key timestamp information, which is extremely important for the investigation of traffic accidents and insurance claims. The crystal oscillator inside the driving recorder is the core component that ensures time accuracy, power on function, image clarity, and wireless connection stability. The following is a detailed introduction to the Epson crystal oscillator in the driving recorder:

Time holding crystal oscillator: Epson MC-146/FC-135 (SMD3215)

The time holding crystal in the driving recorder is usually a passive crystal with a frequency of 32.768KHz, commonly found in Epson MC-146 or smaller FC-135. This crystal oscillator is responsible for maintaining system time, ensuring accurate timing even when the vehicle is not powered on, thus ensuring that recorded video files have precise time stamps.

Power on crystal oscillator: 24MHz

Another important crystal oscillator is a 24MHz surface mount passive crystal oscillator, which is used to trigger the startup process of the driving recorder. The stability of this crystal oscillator directly affects whether the driving recorder can be turned on normally and start recording videos. Without the stable operation of this crystal oscillator, the driving recorder will not be able to start and all functions will not be possible.

High definition crystal oscillator: 27MHz

For high-definition driving recorders, an additional 27MHz crystal oscillator is used to ensure video quality. The accuracy of this crystal oscillator directly affects the stability of video signals and the accuracy of colors. High end driving recorders may use active crystal oscillators instead of passive ones to obtain more stable frequency output, thereby avoiding interference from stray capacitors and ensuring the quality of video images.

Wireless connection crystal oscillator: 26MHz

For driving recorders with WiFi or Bluetooth connectivity, a 26MHz crystal oscillator is the key to ensuring wireless connection stability. The malfunction of this crystal oscillator can cause unstable wireless connection, affecting the data transmission between the driving recorder and mobile devices or cloud servers, thereby affecting the real-time viewing and storage of video data.

The performance and reliability of the crystal oscillator in the driving recorder have a crucial impact on the overall functional performance of the equipment. Choosing high-quality crystal oscillators can ensure that the driving recorder can maintain a stable working state in various environments, providing accurate time information and high-quality video recording.