Texas Instruments provides a recommended PCB layout in the datasheet, but it's essential to follow good PCB design practices, such as separating analog and digital grounds, using a solid ground plane, and minimizing trace lengths and loops. Additionally, place decoupling capacitors close to the device and use a low-ESR capacitor for the VCC pin.
The DS36954M requires a power-on reset (POR) circuit to ensure proper initialization. A simple POR circuit can be implemented using a resistor, capacitor, and diode. Additionally, the device requires a clock signal to be applied before the power supply reaches its operating range. Refer to the datasheet for specific guidelines on power-up sequencing.
The maximum clock frequency for the DS36954M is 100 MHz. However, the device can operate at lower frequencies, and the clock frequency should be chosen based on the specific application requirements. It's essential to ensure the clock signal meets the device's input requirements and is free from noise and jitter.
The DS36954M has a maximum junction temperature of 150°C. To ensure reliable operation, it's essential to provide adequate heat sinking and thermal management. Use a thermal pad or heat sink on the exposed pad of the QFN package, and ensure good airflow around the device. Monitor the device's temperature and adjust the thermal design as needed.
The recommended termination resistors for the DS36954M's outputs depend on the specific application and transmission line characteristics. As a general guideline, use a series termination resistor of 50-75 ohms for single-ended outputs and 25-37.5 ohms for differential outputs. Consult the datasheet and application notes for more detailed information.
DS36954M datasheet
by Texas Instruments
