But - be careful Your plan may not work as you wish. A PIC pin can easily drive 25mA (low) without a FET booster. That equates to a 200 ohm pull-up. That combination will drive an awfully long wire or dozens of devices. But One-Wire sensors have to drive the same line. Just because the PIC can drive the line and the pull-ups does not mean that the One-Wire devices can drive it. And even if your One Wire devices can sink decent current, you may not want them to. If your devices are temperature sensors, then any time they are sinking current they will generate heat. If you read them often, the temperature rise - even if you have them sinking 5mA, will be noticeable.