The LD3600-XX is a BICMOS monolithic integrated circuit designed for use with four-terminal Magneto-Resistive recording heads. The reader architecture is MR current bias/voltage sense and will support user data rates of up to 225 Mbit/sec. A bi-directional serial port is provided to enable the implementation of on-chip MR bias and Write current DACs. The device provides a write driver, low noise read amplifier, serial port controlled head selection, servo bank write, write current, MR read bias current, and read and write fault detection circuitry for up to ten channels. In a servo write servo mode, 5 or 10 channels can be selected at one time. The device requires +5V and -5V and comes in a 100-pin TQFP package or flip-chip die form.