The recommended layout and routing for the DS1390U-3 involves keeping the input and output traces separate, using a solid ground plane, and minimizing the length of the traces. Additionally, it's recommended to use a low-ESR capacitor for the VCC bypass and to place it as close to the VCC pin as possible.
To ensure proper power-up and initialization, it's recommended to follow a controlled power-up sequence, where the VCC pin is powered up before the SCL and SDA pins. Additionally, the device should be reset by pulling the RST pin low for at least 100 ns during power-up.
The maximum cable length supported by the DS1390U-3 depends on the clock frequency and the cable characteristics. As a general rule, the cable length should be limited to 1 meter or less to ensure reliable operation. Longer cable lengths can be used, but they may require additional signal conditioning and termination.
To troubleshoot issues with the DS1390U-3, it's recommended to use a logic analyzer or oscilloscope to monitor the SCL and SDA signals. Check for proper signal levels, rise and fall times, and clock frequency. Additionally, verify that the device is properly powered and initialized, and that the RST pin is properly driven.
Yes, the DS1390U-3 can be used in a multi-master I2C bus configuration. To ensure reliable operation, it's recommended to use a bus arbitrator or a master device that supports clock stretching and bus arbitration. Additionally, each master device should have its own pull-up resistors on the SCL and SDA lines.
DS1390U-3 datasheet
by Maxim Integrated Products
