SLLS867K September 2007 – October 2015 ISO7230C , ISO7230M , ISO7231C , ISO7231M
PRODUCTION DATA.
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NOTE
Information in the following applications sections is not part of the TI component specification, and TI does not warrant its accuracy or completeness. TI’s customers are responsible for determining suitability of components for their purposes. Customers should validate and test their design implementation to confirm system functionality.
ISO723x utilize single-ended TTL or CMOS-logic switching technologies. The supply voltage range is from 3.15 V to 5.5 V for both supplies, VCC1 and VCC2. When designing with digital isolators, it is important to keep in mind that due to 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, μC or UART), and a data converter or a line transceiver, regardless of the interface type or standard.
ISO7231 combined with Texas Instruments' mixed signal micro-controller, RS-485 transceiver, transformer driver, and voltage regulator can create an isolated RS-485 system as shown in Figure 16.
Unlike optocouplers, which need external components to improve performance, provide bias, or limit current, ISO723x only needs two external bypass capacitors to operate.