ASDMB-20.000MHZ-40-T - ABRACON

ASDMB-20.000MHZ-40-T Frequently Asked Questions (FAQs)

• What is the recommended PCB layout for optimal performance of the ASDMB-20.000MHZ-40-T crystal oscillator?
  Abracon recommends a layout with a ground plane underneath the oscillator, and to keep the traces as short as possible to minimize parasitic inductance and capacitance. A 4-layer PCB with a dedicated ground plane is ideal.
• How do I ensure the ASDMB-20.000MHZ-40-T oscillator starts up reliably in my design?
  To ensure reliable startup, Abracon recommends a power-up ramp time of at least 1ms, and a power supply voltage that meets the specified operating range. Additionally, the oscillator should be decoupled from the power supply with a 10nF to 100nF capacitor.
• What is the maximum allowable frequency deviation for the ASDMB-20.000MHZ-40-T oscillator?
  The ASDMB-20.000MHZ-40-T oscillator has a frequency tolerance of ±20ppm over the operating temperature range. This means that the maximum allowable frequency deviation is ±40Hz at 20MHz.
• Can I use the ASDMB-20.000MHZ-40-T oscillator in a design that requires a higher drive level than 40pF?
  While the ASDMB-20.000MHZ-40-T oscillator is specified for a 40pF load, it can be used with higher drive levels up to 100pF. However, this may affect the oscillator's frequency stability and startup reliability. Consult with Abracon's application engineers for specific guidance.
• How do I handle ESD protection for the ASDMB-20.000MHZ-40-T oscillator in my design?
  Abracon recommends using ESD protection devices such as TVS diodes or ESD arrays on the oscillator's input and output pins to prevent damage from electrostatic discharge. The protection devices should be selected based on the specific application requirements.