InLink-TC is a HART protocol modem module that modulates logic level 1200 BAUD serial data onto a HART loop, and demodulates received HART data providing a 1200 BAUD serial bit stream. InLink-TC interfaces to standard 3.3V to 5V logic and only requires 3 control lines; transmit, receive, and request-to-send (RTS). InLink-TC is a complete HART protocol modem - adding only RS232 transceivers and a power supply makes an RS-232 to HART interface. Loop transformer isolation eliminates loop connection polarity and grounding issues and an internal 3V regulator and logic level shifters ensure consistent operation over a wide operating voltage range. The InLink-TC small package size further simplifies integration into your design.