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 device and the crystal oscillator. Additionally, it is recommended to use a 0.1uF decoupling capacitor between the VCC and GND pins.
To ensure the DS2155L+ is properly powered, make sure to connect the VCC pin to a stable 3.3V or 5V power supply, and decouple the power supply with a 0.1uF capacitor. Also, ensure that the power supply can provide enough current to support the device's operating current.
The recommended crystal oscillator configuration for the DS2155L+ involves using a 16.384MHz 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 low-power operation, set the PD pin high to enable the power-down mode. In this mode, the device's power consumption is reduced to a minimum. Additionally, the device can be configured to operate in a low-power mode by setting the clock frequency to a lower value.
The maximum clock frequency supported by the DS2155L+ is 16.384MHz. However, the device can be configured to operate at lower clock frequencies to reduce power consumption.
DS2155L+ datasheet
by Maxim Integrated Products
