The MAX14934–MAX14936 are a family of four-channel, 5kVRMS digital isolators utilizing Maxim’s proprietary process technology. For applications requiring 2.75kVRMS of isolation, see the MAX14930–MAX14932. The MAX14934–MAX14936 family transfers digital signals between circuits with different power domains at ambient temperatures up to +125°C.The MAX14934–MAX14936 family offers all three possible unidirectional channel configurations to accommodate any four-channel design, including SPI, RS-232,RS-485, and large digital IO modules. For applications requiring bidirectional channels, such as I²C, refer to the MAX14937.Devices are available with data rates from DC up to 1Mbps, 25Mbps, or 150Mbps. Each device is also available in either a default high or default low configuration. The default is the state an output goes to when its input is unpowered. See the Product Selector Guide and OrderingInformation for the suffixes associated with each option. Independent 1.71V to 5.5V supplies on each side of the isolator also make the devices suitable for use as level translators.The MAX14934–MAX14936 are available in a 16-pin wide body (10.3mm x 7.5mm) SOIC package. All devices are rated for operation at ambient temperatures of -40°Cto +125°C.ApplicationsBattery ManagementFieldbus Communications for Industrial AutomationGeneral Multichannel Isolation ApplicationsIsolated SPI, RS-232, RS-485/RS-422Medical Systems

The MAX14934–MAX14936 are a family of four-channel, 5kVRMS digital isolators utilizing Maxim’s proprietary process technology. For applications requiring 2.75kVRMS of isolation, see the MAX14930–MAX14932. The MAX14934–MAX14936 family transfers digital signals between circuits with different power domains at ambient temperatures up to +125°C.The MAX14934–MAX14936 family offers all three possible unidirectional channel configurations to accommodate any four-channel design, including SPI, RS-232,RS-485, and large digital IO modules. For applications requiring bidirectional channels, such as I²C, refer to the MAX14937.Devices are available with data rates from DC up to 1Mbps, 25Mbps, or 150Mbps. Each device is also available in either a default high or default low configuration. The default is the state an output goes to when its input is unpowered. See the Product Selector Guide and OrderingInformation for the suffixes associated with each option. Independent 1.71V to 5.5V supplies on each side of the isolator also make the devices suitable for use as level translators.The MAX14934–MAX14936 are available in a 16-pin wide body (10.3mm x 7.5mm) SOIC package. All devices are rated for operation at ambient temperatures of -40°Cto +125°C.ApplicationsBattery ManagementFieldbus Communications for Industrial AutomationGeneral Multichannel Isolation ApplicationsIsolated SPI, RS-232, RS-485/RS-422Medical Systems

The MAX14945 isolated RS-485/RS-422 transceiver provides2750VRMS (60s) of galvanic isolation between the cableside (RS-485/RS-422 driver/receiver side) and the UARTside of the device. Isolation improves communication bybreaking ground loops and reduces noise when thereare large differences in ground potential between ports.Signals are passed across the isolation barrier throughintegrated high-voltage capacitors. This device allows forrobust communication at any speed up to 500kbps.The device includes one half-duplex drive/receive channel.The receiver is 1/8-unit load, allowing up to 256 transceiverson a common bus.Integrated true fail-safe circuitry ensures a logic-high on thereceiver output when inputs are shorted or open. Undervoltagelockout disables the driver when the cable side or UART sidepower supplies are below functional levels.The driver outputs/receiver inputs are protected from±30kV electrostatic discharge (ESD) to GNDB on thecable side, as specified by the Human Body Model (HBM).The MAX14945 is available in a wide body 16-pinSO package and operates over the -40°C to +85°Ctemperature range.ApplicationsHVACIndustrial Automation EquipmentPower MetersProgrammable Logic Controllers

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