ISO1640BDR

The ISO1640BDR is a two-channel bidirectional I2C isolator in the narrow-body SOIC-8 (D) package, rated at 3kVrms isolation and specified from -40 C to +125 C. Both channels are bidirectional, including the clock line, so clock stretching and multi-controller buses keep working across the isolation barrier. That lets designers separate ground domains in power supplies, battery management and industrial interfaces without redesigning the I2C protocol layer, reducing noise coupling and protecting low-voltage controllers from transients on the field side. Selection advice: this D code is the narrow-body 3kVrms version; the wide-body DW sibling in the same family is the 5kVrms variant, so match the package code to the isolation rating and creepage your safety review requires instead of treating the two as interchangeable. Parameters verified against Texas Instruments documentation.