The recommended layout and routing for the DS2119ME involves keeping the analog and digital grounds separate, using a solid ground plane, and minimizing the length of the traces between the device and the crystal oscillator. Additionally, it's recommended to use a 4-layer PCB with a dedicated power plane and a dedicated ground plane.
To ensure the DS2119ME is properly powered and decoupled, use a high-quality power supply with low noise and ripple, and decouple the device with 0.1uF and 10uF capacitors between VCC and GND. Additionally, use a 1uF capacitor between VCC and AVCC for analog power supply decoupling.
The maximum clock frequency that can be used with the DS2119ME is 25MHz. However, the device can also be used with lower clock frequencies, such as 10MHz or 12MHz, depending on the specific application requirements.
To configure the DS2119ME for use with a specific oscillator frequency, use the FSEL pins to select the desired frequency range, and then use the XT1 and XT2 pins to connect the crystal oscillator. The device will automatically detect the oscillator frequency and configure itself accordingly.
The FSEL pins on the DS2119ME are used to select the frequency range of the crystal oscillator. By setting the FSEL pins to the appropriate logic levels, the device can be configured to use a specific frequency range, such as 10MHz to 20MHz or 20MHz to 30MHz.
DS2119ME datasheet
by Maxim Integrated Products
