Logic translator or level shifter ICs are devices used to pass information between digital logic devices that are operating from different/incompatible supply voltages, or which implement different signaling methods. Examples might include the connection of a digital-output sensor requiring a 5 V supply to an FPGA with a 3.3 V I/O supply, or converting between single-ended signaling methods like CMOS or TTL and differential techniques, such as PECL or LVDS.
