The maximum number of devices that can be connected to a single 1-Wire bus is limited by the bus capacitance and the pull-up resistor value. Typically, up to 10 devices can be connected, but this can be increased to 20 or more with careful bus design and component selection.
To ensure reliable communication over long 1-Wire bus lengths, use a strong pull-up resistor (e.g., 1 kΩ), keep the bus capacitance low, and use a repeater or a buffer to amplify the signal. Additionally, consider using a shielded cable and minimizing electromagnetic interference (EMI) sources.
The DS2502P has an operating temperature range of -40°C to +85°C. However, the device can be operated at temperatures up to +100°C for short periods of time, but this may affect its reliability and lifespan.
Yes, the DS2502P can operate with a power supply voltage between 2.7V and 5.5V. However, the device's internal voltage regulator requires a minimum input voltage of 3.3V to ensure reliable operation.
A robust 1-Wire bus reset mechanism can be implemented by using a dedicated reset pin, such as the RSTZ pin on the DS2502P. This pin can be connected to a reset generator or a microcontroller output to ensure a clean and reliable bus reset.
DS2502P datasheet
by Maxim Integrated Products
