General Description

The CA-IS373x devices are high-performance triple-channel digital isolators with up to 3.75kVRMS (narrow-body package)  or 5kVRMS (wide-body package) isolation ratings and DC to 150Mbps ultra-fast data rate. The CA-IS373x devices offer high electromagnetic immunity and low emissions at low power consumption while isolating different ground domains and blocking high-voltage/high-current transients from sensitive or human interface circuitry. Each isolation channel has a logic input and output buffer separated by a capacitive silicon dioxide (SiO2) insulation barrier, the integrated  Schmitt trigger on each input provides excellent noise immunity.

The CA-IS3730 features 3 channels transferring digital signals in one direction for applications such as isolated digital I/Os. The CA-IS3731 device has 2 forward and 1 reverse-direction channel. All of the devices in this family come with enable pins that can be used to put the outputs in high impedance for multi-master driving applications to reduce power consumption. When the input is either not powered or is open-circuit, the default output is low for devices with the suffix  L and high for devices with the suffix H, see the Ordering  Information for suffixes associated with each option.