Click here for production status of specific part numbers. MAX33070E/MAX33071E/ +3.3V and +5.0V, RS-485 Half-Duplex MAX33074E Transceiver with 65V Fault Protection, 40V CMR, and 40kV ESD Benefits and Features General Description The MAX33070E/MAX33071E/MAX33074E are a family Integrated Protection for Robust Communication of fault-protected RS-485/RS-422 transceivers with high Protection on Driver Outputs/Receiver Inputs 65V protection for overvoltage conditions on the (A, B Data Lines) communication bus lines, ensuring robust protection in - 65V Fault Protection Range on Driver harsh industrial environments. All devices have 40V of Outputs/Receiver Inputs common-mode range (CMR) within V (+4.5V to CCH - 40V Common-Mode Range on Driver +5.5V), exceeding the RS-485 standard of -7V to +12V, Outputs/Receiver Inputs making them suitable for electrically noisy environments - 40kV Human Body Model (JEDEC JS-001- where different systems have shifting ground levels 2017) ESD Protection relative to each other. They also incorporate a high ESD - 15kV Air-Gap Discharge (IEC 61000-4-2) protection circuit capable of protecting against 40kV of ESD Protection ESD Human Body Model (HBM) for driver outputs and - 10kV Contact Discharge (IEC 61000-4-2) receiver inputs (A and B data lines). Each device ESD Protection contains one driver and one receiver and operates over Hot-Swap Protection the +3V to +5.5V supply range, making it convenient for Short-Circuit Protection designers to use one part with either +3.3V or +5V Thermal Shutdown supply voltages across multiple end equipment. True Fail-Safe Guarantees Known Receiver Output State These devices feature a receiver enable ( ) input that Wide Operating Temperature Range from allows for a low-current shutdown state. The -40C to +125C MAX33070E features slew-rate-limited outputs for data rates up to 500kbps. For applications requiring higher High-Performance Transceiver Enables Flexible bandwidth, the MAX33071E is rated up to 2Mbps, and Designs the MAX33074E up to 20Mbps. These transceivers are Compliant with RS-485 EIA/TIA-485 Standard optimized for robust communication in noisy 500kbps (MAX33070E), 2Mbps (MAX33071E), environments. A true fail-safe feature guarantees a 20Mbps (MAX33074E) Maximum Data Rate logic-high on the receiver output when the inputs are 3.3V and 5.0V Supply Voltage open or shorted. Driver outputs are protected against 1/8 Unit Load for up to 256 Devices on the Bus short-circuit conditions. The receivers feature a 1/8-unit load input impedance, allowing up to 256 transceivers Ordering Information appears at end of data sheet. on a bus. The MAX33070E/MAX33071E are available in an 8-pin SO, and the MAX33074E is available in an 8-pin SO with an exposed pad. All three devices operate over the -40C to +125C temperature range. Applications Industrial Automation Equipment Home and Building Automation Agriculture and Heavy Machinery Power Supply and UPS Elevator Control Motion Controllers www.maximintegrated.com 19-100900 Rev 0 1/21 MAX33070E/MAX33071E/ +3.3V and +5.0V, RS-485 Half-Duplex MAX33074E Transceiver with 65V Fault Protection, 40V CMR, and 40kV ESD Simplified Block Diagram V CC MAX33070E MAX33071E MAX33074E RO R RE B SHUTDOWN A DE DI D GND www.maximintegrated.com 19-100900 Rev 0 12/20 Maxim Integrated 2 PROTECTION