MAX22027FAWA+

MAX22027FAWA+ is a compact, isolated, half-duplex RS-485/RS-422 transceiver with AutoDirection control. It provides 3.5kVRMS of digital galvanic isolation between the cable side (RS-485/RS-422 driver/receiver side) and the UART side of the device. Isolation improves communication by breaking ground loops and reduces noise when there are large differences in ground potential between ports. It features AutoDirection control making this device ideal for applications such as isolated RS-485 ports, where the driver input is used in conjunction with the driver-enable signal to drive the differential bus. It features reduced slew-rate drivers that minimize EMI and reduce reflections caused by improper termination of cable allows error-free transmission up to 0.5Mbps. Applications include utility meters, industrial automation equipment, programmable logic controllers, and HV AC.

• UL according to UL1577, cUL according to CSA bulletin 5A safety regulatory approvals
• High-level integration reduces overall solution size
• Integrated protection ensures robust communication, ±10kV ESD (HBM) on driver output/receiver input
• Failsafe receiver prevents fault transition on
• Withstands 630VPEAK maximum repetitive peak isolation voltage (VIORM)
• Continuously withstands 445VRMS maximum working-isolation voltage (VIOWM)
• AutoDirection eliminates the need for DE and active-low RE control signals
• Maximum data rate is 0.5Mbps min at VDDA – VGNDA=1.71V to 5.5V, VDDB – VGNDB=4.75V to 5.25V
• 8 wide SOIC package
• Temperature range from -40°C to +85°C

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