Texas Instruments ISO674x/ISO674x-Q1 Quad-Channel Digital Isolators

The Texas Instruments ISO674x/ISO674x-Q1 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. These devices come with enable pins that can be used to put the respective outputs in high impedance for multi-master driving applications. ISO6741/ISO6741-Q1 device has three forward and one reverse-direction channel. In the event of input power or signal loss, the default output is high for devices without suffix F and low for devices with suffix F.

When used in conjunction with isolated power supplies, these devices help 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 ISO674x/ISO674x-Q1 devices has been significantly enhanced to ease system-level ESD, EFT, surge, and emissions compliance. The ISO674x/ISO674x-Q1 family of devices is available in a 16-pin SOIC wide-body (DW) package and is a pin-to-pin upgrade to the older generations. The ISO674x-Q1 devices are AEC-Q100 qualified for automotive applications.