CTS Corporation recommends a 4-layer PCB with a solid ground plane, and to keep the crystal oscillator traces as short and shielded as possible to minimize noise and radiation.
To ensure reliable oscillator startup, CTS recommends using a 10kΩ to 20kΩ pull-up resistor on the XTAL1 pin, and a 10nF to 22nF capacitor in series with the crystal oscillator.
The CA25C2504GMT is rated for operation from -40°C to +125°C, but it's recommended to derate the frequency by 0.05% per °C above 85°C to ensure reliable operation.
Yes, the CA25C2504GMT can be used with a different frequency crystal, but the frequency range is limited to 10 MHz to 40 MHz. Consult the datasheet for specific frequency vs. load capacitance requirements.
CTS recommends using a TVS (Transient Voltage Suppressor) diode or a multi-layer varistor (MLV) to protect the CA25C2504GMT from electrostatic discharge (ESD) events.
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