The DS2480B is a serial port to 1-Wire interface chip that supports regular and overdrive speeds. It connects directly to UARTs and 5V RS232 systems. Interfacing to RS232C (12V levels) requires a passive clamping circuit and one 5V to 12V level translator. Internal timers relieve the host of the burden of generating the time-critical 1-Wire communication waveforms. In contrast to the DS9097(E) where a full 1-Wire and iButton are registered trademarks of Dallas Semiconductor.