FA-238A crystal oscillator has become the preferred choice for in car Bluetooth

Sep 14,2024
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The Bluetooth module is a PCBA board that integrates Bluetooth functionality and is mainly used for short-range wireless communication. According to different functions, it is divided into Bluetooth data module and Bluetooth voice module, etc. In fact, Bluetooth module refers to the basic circuit set of chips integrated with Bluetooth function, which is used for wireless network communication and can be roughly divided into data transmission module, Bluetooth audio module, Bluetooth audio and data two in one module and other categories. Generally speaking, modules have the characteristics of semi-finished products, which are processed on the basis of chips to make subsequent applications more convenient.

As a short-range wireless communication technology that replaces data cables, Bluetooth supports point-to-point and point to multipoint communication methods. It can wirelessly connect various data and voice devices in homes or offices into a Pico net, and several Pico nets can further connect to each other to form a distributed network (scatter net), thereby achieving fast and convenient communication between these connected devices. DSP samples analog signals, processes the digital signals after A/D conversion, and transmits them to the receiving end through Bluetooth interface. Similarly, DSP performs D/A conversion on the digital signals received by Bluetooth to make them analog signals.

The important role of Epson FA-238A crystal oscillator in car Bluetooth:

The Epson FA-238A crystal oscillator plays a crucial role in the in car Bluetooth module, serving as an important component for wireless transmission of audio, communication, and data within the vehicle.

1. Provide a stable clock signal.

During Bluetooth communication, the crystal oscillator acts as a precise timer, providing stable and accurate clock signals to the device. This clock signal is used to synchronize the sending and receiving operations of Bluetooth devices, ensuring smooth data transmission between devices. By relying on the clock signal provided by the crystal oscillator, Bluetooth devices can identify and analyze the received data signal based on the synchronized clock.

2. Implement synchronous data processing.

The accuracy of crystal oscillators is crucial for the stability and reliability of Bluetooth communication. If the clock signal provided by the crystal oscillator is not accurate enough, communication between devices may experience deviations or packet loss, which can have a negative impact on the quality and speed of communication.

The demand for crystal oscillators in car Bluetooth

Common frequency points include: 16Mhz, 24Mhz, 26Mhz

In terms of miniaturization and reliability, Bluetooth modules are classified according to their uses, including data Bluetooth modules, serial Bluetooth modules, voice Bluetooth modules, and in car Bluetooth modules. Epson FA-238A package 3225 passive crystal oscillator is widely used in many Bluetooth devices, which can provide stable and accurate frequency signals. This 3225 package is a small and common packaging type. Passive crystal oscillators can resist the impact of external electromagnetic interference on car Bluetooth modules, providing users with clear and stable audio and data transmission, while also saving energy and extending battery life.