High-voltage drive and I/O interfaces in a 0.35-/spl mu/m CMOS process

This paper describes various high-voltage drive and I/O interfaces developed as building blocks typically used for drive and control ICs. The interfaces can be used at voltages of up to 40V. They are implemented as CMOS-only circuits in a 0.35-/spl mu/m standard CMOS process using an additional high-voltage module. The presented interfaces include an output driver, a serial bus transceiver, usable for ISO 9141 or LIN type communication ports, and general-purpose I/O port.