ISO6731 General-Purpose 3-Channel 2/1 Digital Isolator

Texas Instruments' ISO6731 is a high-performance, 3-channel digital isolator that is ideal for cost-sensitive applications requiring up to 5,000 V_RMS isolation ratings per UL 1577. This device is certified by VDE, TUV, CSA, and CQC. The ISO6731 devices provide high electromagnetic immunity and low emissions at low power consumption while isolating CMOS or LVCMOS digital I/Os. Each isolation channel has a logic input and output buffer separated by TI's double capacitive silicon dioxide (SiO₂) insulation barrier. This device comes with enable pins that can be used to put the respective outputs in high impedance for multi-master driving applications.

The ISO6731 device has two forward and one reverse-direction channels. In the event of input power or signal loss, the default output is high for the device without suffix F and low for the device with suffix F. Used in conjunction with isolated power supplies, this device helps prevent noise currents on data buses such as UART, SPI, RS-485, RS-232, and CAN from damaging sensitive circuitry. Through innovative chip design and layout techniques, the electromagnetic compatibility of the ISO6731 device has been significantly enhanced to ease system-level ESD, EFT, surge, and emissions compliance. The ISO6731 device is available in a 16-pin SOIC widebody (DW) package and is a pin-to-pin upgrade to the older generations.