alexandros
Well-known member
Hi all,
I'm designing a PCB with some I2C ICs. I'm designing rather thick traces for the I2C communication (0.35mm), but I have a question concerning the following schematic:
All other traces are at 0.25mm width, and I was wondering whether the VDD trace should also be at 0.35mm, as it is connected to both I2C signals over resistors. Will connecting a 0.25mm trace through a resistor to the I2C signals increase impedance? Or it is fine to keep the VDD trace at 0.25mm? That might be pretty obvious to people who know circuit design, but it's not obvious at all to me.
Any hint appreciated
I'm designing a PCB with some I2C ICs. I'm designing rather thick traces for the I2C communication (0.35mm), but I have a question concerning the following schematic:
All other traces are at 0.25mm width, and I was wondering whether the VDD trace should also be at 0.35mm, as it is connected to both I2C signals over resistors. Will connecting a 0.25mm trace through a resistor to the I2C signals increase impedance? Or it is fine to keep the VDD trace at 0.25mm? That might be pretty obvious to people who know circuit design, but it's not obvious at all to me.
Any hint appreciated