Fox Electronics recommends a 4-layer PCB with a solid ground plane, and a separate power plane for the oscillator. The crystal should be placed as close as possible to the oscillator pins, and the traces should be kept short and shielded to minimize noise and radiation.
To ensure reliable startup, Fox Electronics recommends a power-up sequence that allows the voltage to rise slowly (typically 1-2 ms) to the recommended operating voltage. Additionally, a 10-100 nF decoupling capacitor should be placed close to the VCC pin to filter out noise and ensure a stable power supply.
The maximum allowable frequency deviation for the FQ7050BR-7.3728 is ±50 ppm over the operating temperature range of -40°C to +85°C. This deviation is due to the inherent characteristics of the crystal oscillator and can be affected by factors such as temperature, voltage, and aging.
While the FQ7050BR-7.3728 is specified for a 7.3728 MHz output frequency, it is possible to use it in a design that requires a different frequency by using an external divider or multiplier circuit. However, this may affect the oscillator's performance and stability, and should be carefully evaluated and tested.
To troubleshoot issues with the FQ7050BR-7.3728 oscillator, Fox Electronics recommends checking the power supply voltage, decoupling capacitors, and PCB layout for any errors or omissions. Additionally, verify that the crystal is properly connected and not damaged. If the issue persists, consult the datasheet and application notes, or contact Fox Electronics' technical support for further assistance.
