CSTLS4M91G56-B0 - Murata Electronics

CSTLS4M91G56-B0 Frequently Asked Questions (FAQs)

• What is the recommended PCB layout for optimal performance?
  Murata recommends a symmetrical PCB layout with a ground plane underneath the oscillator to minimize noise and radiation. A 4-layer PCB with a dedicated ground layer is ideal. Keep the oscillator away from high-frequency components and ensure a clear return path for the ground connection.
• How do I handle the oscillator's start-up time and stability?
  The CSTLS4M91G56-B0 has a typical start-up time of 2-5 ms. To ensure stability, allow the oscillator to stabilize for at least 10 ms before using its output. You can also add a reset circuit or a power-on reset (POR) to ensure the oscillator is properly initialized.
• What is the maximum operating temperature range for this oscillator?
  While the datasheet specifies an operating temperature range of -40°C to +85°C, Murata recommends derating the oscillator's frequency tolerance and stability above +70°C. For extended temperature ranges, consult with Murata's application engineers or consider using a more temperature-stable oscillator.
• How do I reduce EMI and RFI emissions from the oscillator?
  Use a shielded enclosure, keep the oscillator away from antennas and high-frequency components, and ensure a low-impedance ground connection. You can also add EMI filters or chokes to the oscillator's output to reduce emissions.
• What is the recommended drive level for the oscillator's output?
  The CSTLS4M91G56-B0 is designed to drive CMOS or TTL logic levels. A drive level of 10-20 mA is recommended to ensure reliable operation. Exceeding the maximum drive level may reduce the oscillator's lifespan or cause instability.