The ISO7231ADW is a triple-channel Digital Isolator with multiple channel configurations and output-enable functions. This device has logic input and output buffers separated by TI's silicon dioxide (SiO2) isolation barrier. Used in conjunction with isolated power supplies, it blocks 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. The ISO7231 has two channels in one direction and one channel in opposition. It has an active-high output enable that when driven to a low level, places the output in a high-impedance state. It also has TTL input thresholds and a noise-filter at the input that prevents transient pulses of up to 2ns in duration from being passed to the output of the device. The device comes with a periodic update pulse is sent across the isolation barrier to ensure the proper dc level of the output.
