The ISOS141-SEP four channel digital isolator provides flexibility for multiple use cases in LEO applications. 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. It can also be used to isolate multiple static signals in a system to provide additional redundancy and robustness. When designing with digital isolators, keep in mind that because of the single-ended design structure, digital isolators do not conform to any specific interface standard and are only intended for isolating single-ended CMOS or TTL digital signal lines. The isolator is typically placed between the data controller (that is, MCU or FPGA), and a data converter or a line transceiver, regardless of the interface type or standard.

Additionally, this digital isolator can be used as a logic-level translator in addition to providing isolation. Since an isolation barrier separates the two sides, each side can be sourced independently with any voltage within recommended operating conditions. The supply voltage range is from 2.25 V to 5.5 V for both supplies, V_CC1 and V_CC2. As an example, it is possible to supply ISOS141-SEP V_CC1 with 3.3 V (which is within 2.25 V to 5.5 V) and V_CC2 with 5V (which is also within 2.25 V to 5.5 V).