General Description

The CA-IS374x devices are high-performance four-channel,  unidirectional digital isolators with up to 5kVRMS wide-body package isolation rating and DC to 150Mbps ultra-fast data rate. The CA-IS374x 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 in automotive applications.

The CA-IS374x family offers all possible unidirectional channel configurations to accommodate any 4-channel  design. The CA-IS3740 features 4 channels transferring digital signals in one direction and the output enabled for the B  side is active-high. The CA-IS3741 device has three forward and one reverse-direction channel, making it ideal for applications such as isolated SPI, and RS-485 communication.  The CA-IS3742 provides further design flexibility with two channels in each direction. Both CA-IS3741 and CA-IS3742  come with individual enable control pins for each side of the isolator which can be used to put the outputs in high impedance for multi-master driving applications to reduce power consumption.