Texas Instruments today introduced a bidirectional isolator family compatible with I2C interfaces that consumes as much as 38-percent lower power than competitive devices. In addition, the ISO1540 and ISO1541 offer better transient immunity and faster switching times than optocouplers. The ISO1540 and ISO1541 are low-power, bidirectional isolators that are compatible with I2C interfaces. These devices have their logic input and output buffers separated by TI’s Capacitive Isolation technology using a silicon dioxide (SiO2) barrier. When used in conjunction with isolated power supplies, these devices block high voltages, isolate grounds, and prevent noise currents from entering the local ground and interfering with or damaging sensitive circuitry.
Source: Texas Instruments