The ISO7220 and ISO7221 are dual-channel digital isolators. To facilitate PCB layout, the channels are oriented
in the same direction in the ISO7220 and in opposite directions in the ISO7221. These devices have a logic input
and output buffer separated by TI’s silicon-dioxide (SiO2) isolation barrier, providing galvanic isolation of up to
4000 V. Used in conjunction with isolated power supplies, these devices block high voltage, isolate grounds, and
prevent noise currents on a data bus or other circuits from entering the local ground and interfering with or
damaging sensitive circuitry.
