The recommended layout and routing for the DS2155L involves keeping the analog and digital grounds separate, using a solid ground plane, and minimizing the length of the traces between the DS2155L and the crystal oscillator. Additionally, it is recommended to use a 4-layer PCB with a dedicated power plane and a dedicated ground plane.
To ensure the DS2155L is properly powered, make sure to decouple the power supply with a 10uF capacitor and a 100nF capacitor in parallel, and use a low-dropout regulator (LDO) to regulate the voltage. Also, ensure that the power supply is clean and free of noise.
The recommended crystal oscillator configuration for the DS2155L involves using a 25MHz crystal oscillator with a load capacitance of 18pF and a series resistance of 1kΩ. The crystal oscillator should be connected between the XTAL1 and XTAL2 pins.
To configure the DS2155L for a specific clock frequency, use the Clock Control Register (CCR) to select the desired clock frequency. The CCR allows you to select from a range of clock frequencies, including 25MHz, 30.72MHz, and 38.4MHz.
The maximum operating temperature range for the DS2155L is -40°C to +85°C. However, it is recommended to operate the device within a temperature range of 0°C to +70°C for optimal performance.
DS2155L datasheet
by Maxim Integrated Products
