EVALUATION KIT AVAILABLE Click here to ask an associate for production status of specific part numbers. MAX22025-MAX22028/ Compact, Isolated, Half-Duplex RS-485/RS-422 MAX22025F-MAX22028F Transceivers with AutoDirection Control General Description Benefits and Features The MAX22025-MAX22028/MAX22025F-MAX22028F High-Level Integration Reduces Overall Solution Size compact isolated RS-485/RS-422 transceivers provide Fully Isolated Half-Duplex RS-485/RS-422 3.5kV of digital galvanic isolation between the cable- Transceivers RMS side (RS-485/RS-422 driver/ receiver-side) and the UART- Compact 8-Pin Wide Body SOIC Package (5.5mm side of the device. Isolation improves communication by Creepage) breaking ground loops and reduces noise when there are Integrated Protection Ensures Robust Communication large differences in ground potential between ports. These 10kV ESD (HBM) on Driver Outputs/Receiver devices allow for robust communication up to 0.5Mbps or Inputs 16Mbps. Failsafe Receiver Prevents Fault Transition on The MAX22025-MAX22028/MAX22025F-MAX22028F Receiver Input Short or Open Events (MAX22025F- feature Maxims proprietary AutoDirection control making MAX22028F) these devices ideal for applications such as isolated Withstands 3.5kV Isolation Voltage for 60 RMS RS-485 ports, where the driver input is used in conjunction Seconds (V ) ISO with the driver-enable signal to drive the differential bus. Withstands 630V Maximum Repetitive Peak- PEAK Isolation Voltage (V ) IORM The MAX22025/MAX22027/MAX22025F/MAX22027F Continuously Withstands 445V Maximum RMS feature reduced slew rate drivers that minimize EMI and Working-Isolation Voltage (V ) IOWM reduce reflections caused by improper termination of ca- ble allowing error-free transmission up to 0.5Mbps. The Enables Flexible System Design MAX22026/MAX22028/MAX22026F/MAX22028F driver 0.5Mbps Maximum Data Rate with Slew-Rate outputs are not slew-rate limited, allowing transmit Limited Driver (MAX22025/MAX22027/ speeds up to 16Mbps. MAX22025F/MAX22027F) 16Mbps Maximum Data Rate (MAX22026/ The receiver output of the MAX22025/MAX22026/ MAX22028/MAX22026F/MAX22028F) MAX22025F/MAX22026F does not follow (V -V ) when A B AutoDirection Eliminates the Need for DE and RE the device is in the driver-enabled state. The receiver Control Signals output on the MAX22027/MAX22028/MAX22027F/ MAX22028F always follows (V -V ). A B Safety Regulatory Approvals The driver outputs and receiver inputs are protected from 10kV electrostatic discharge (ESD) to GNDB on the ca- UL According to UL1577 ble side, as specified by the Human Body Model (HBM). cUL According to CSA Bulletin 5A The MAX22025-MAX22028/MAX22025F-MAX22028F Ordering Information appears at end of data sheet. are available in a compact 8-pin wide body SOIC package and operate over the -40C to +85C temperature range. Applications Utility Meters Industrial Automation Equipment Programmable Logic Controllers HVAC Ordering Information appears at end of data sheet. 19-100636 Rev 6 3/21 2021 Analog Devices, Inc. All rights reserved. Trademarks and registered trademarks are the property of their respective owners. One Analog Way, Wilmington, MA 01887 U.S.A. Tel: 781.329.4700 2021 Analog Devices, Inc. All rights reserved.MAX22025-MAX22028/ Compact, Isolated, Half-Duplex RS-485/RS-422 MAX22025F-MAX22028F Transceivers with AutoDirection Control Functional Diagram VDDA VDDB RXD V DT MAX22025- COM B B MAX22028/ STATE A MAX22025F- MACHINE A MAX22028F TXD GNDA GNDB www.analog.com Analog Devices 2 RS-485 TRANSCEIVER