The CA-IS3731HN is a high-performance 3-channel digital isolator from Chipanalog, featuring a channel configuration of 2 forward and 1 reverse. It is designed for high-speed data transmission up to 150 Mbps with a default high output state and high common-mode transient immunity (CMTI) of ±150 kV/µs. The device provides robust isolation ratings of 3.75kVrms/5kVrms using capacitive Silicon Dioxide (SiO2) insulation and operates across a supply voltage range of 2.5V to 5.5V in a SOIC-16 narrow package.

Due to its specific 2/1 channel configuration and high CMTI, this part is suitable for engineers seeking high-reliability isolation in industrial environments. While no direct database cross-references are listed, similar-function candidates would typically include triple-channel digital isolators from manufacturers like Texas Instruments (ISO series) or Analog Devices (iCoupler series) that match the 2-forward/1-reverse directionality and voltage specifications.