EPSON differential crystal oscillator frequency point 156.25MHz, LVPECL output applied to optical modules

    An optical module consists of optoelectronic components, functional circuits, and optical interfaces. Optoelectronic components include both emitting and receiving parts. Simply put, the function of an optical module is to convert electrical signals into optical signals at the transmitting end, transmit them through optical fibers, and then convert the optical signals into electrical signals at the receiving end.

In optical modules, crystal oscillators are mainly used in the following areas:

a、 Clock recovery and data modulation: The optical module needs to convert the input electrical signal into an optical signal for transmission, and also needs to convert the received optical signal into an electrical signal for processing. In order to accurately modulate and demodulate data during the transmission and reception process.

b、 Data timing control: Each circuit in the optical module needs to operate according to precise timing to ensure accurate transmission and processing of data. Crystal oscillators provide a unified clock reference, ensuring the coordinated operation of various circuits within the module.

c、 Supporting high-frequency operations: With the continuous development of optical communication technology, optical modules need to support increasingly high data transmission rates. Crystal oscillators generate high-frequency stable clock signals, supporting stable operation of optical modules at high frequencies and meeting the requirements of high-speed data transmission.

As for the frequency and quantity of crystal oscillators, it depends on the type and application scenario of the optical module. Different types of optical modules may use crystal oscillators with different frequencies. Epson's SG2520EGN (X1G005881000515) differential crystal oscillator, with a frequency of 156.25MHz and LVPECL output, is designed specifically for optical modules to provide stable and accurate clock signals, greatly improving the reliability of data transmission and system efficiency.

Characteristics of SG2520EGN (X1G005881000515) differential crystal oscillator in optical modules:

1. High frequency accuracy

Ensure data accuracy: The high frequency accuracy of 156.25MHz enables the crystal oscillator to provide accurate clock signals, providing a solid time reference for the operation of the i-optical module, thereby ensuring the accuracy and stability of data transmission.

2. Differential LVPECL output

Improving signal integrity: LVPECL (Low Voltage Positive Emission Coupled Logic) output interface can effectively reduce signal interference and loss, provide high integrity signal transmission, suitable for high-speed and high-frequency applications, and ensure stable operation of optical modules in complex environments.

3. Superior phase noise performance

Optimize system performance: Epson's differential crystal oscillator has low phase noise characteristics, reducing signal interference and clock jitter, improving data transmission clarity and reliability, and effectively enhancing the overall performance of optical modules.

4. Wide temperature range and high stability

Adapting to harsh environments: This crystal oscillator design has a wide operating temperature range and excellent environmental adaptability, capable of stable operation under various extreme conditions, providing continuous and reliable clock support for optical modules, ensuring efficient operation of the system in harsh environments.

5. Compact packaging

Flexible integration: Epson's differential crystal oscillator adopts a compact packaging design, which facilitates integration into space limited optical modules, not only saving space, but also improving the overall integration of the system.