EVALUATION KIT AVAILABLE MAX14941/MAX14942 5kV Isolated 20Mbps Half-Duplex PROFIBUS/ RS-485 Transceivers with 35kV ESD Protection General Description Benefits and Features The MAX14941/MAX14942 isolated RS-485/PROFIBUS-DP High-Performance Transceiver Enables Flexible transceivers provide 5000V (60s) of galvanic isolation Designs RMS between the cable-side (RS-485 driver/receiver-side) Integrated LDO for Cable-Side Power and the UART-side of the device. Isolation improves Compliant with RS-485 EIA/TIa-485 Standard communication by breaking ground loops and reduces 20Mbps Maximum Data Rate Allows Up to 128 Devices on the Bus noise when there are large differences in ground potential between ports. These devices allow for robust communication Integrated Protections Ensures Robust up to 20Mbps. Communication 35kV ESD (HBM) on Driver Outputs/Receiver An integrated LDO provides a simple and space-efficient architecture for providing power to the cable side of the IC. Inputs 5kV Withstand Isolation Voltage for 60s RMS Each device includes one half-duplex driver/receiver (V ) ISO channel. The receiver is 1/4-unit load, allowing up to 128 1200V Maximum Repetitive Peak-Isolation PEAK transceivers on a common bus. Voltage (V ) IORM Integrated true fail-safe circuitry ensures a logic-high on 848V Maximum Working-Isolation Voltage RMS the receiver output when inputs are shorted or open. (V ) IOWM Undervoltage lockout disables the driver when cable-side > 30 Years Lifetime at Rated Working Voltage or UART-side power supplies are below functional levels. Withstands 10kV Surge per IEC 61000-4-5 Thermal Shutdown The driver outputs/receiver inputs are protected from 35kV electrostatic discharge (ESD) to GNDB on the Safety Regulatory Approvals Pending cable side, as specified by the Human Body Model (HBM). UL According to UL1577 The MAX14941/MAX14942 are available in a wide-body cUL According to CSA Bulletin 5A 16-pin SOIC package and operate over the -40C to Applications +105C temperature range. Industrial Automation Equipment Programmable Logic Controllers HVAC Functional Diagram Power Meters V V DDA LDO MAX14941 Ordering Information appears at end of data sheet. MAX14942 LDO VDDB (PV) SBA* RXD A RE TXD B DE (DEM) () MAX14941 only The PROFIBUS PROCESS FIELD BUS logo is a registered * MAX14942 only GNDA GNDB trademark of PROFIBUS and PROFINET International (PI) 19-8116 Rev 1 1/17 RS-485 TRANSCEIVERMAX14941/MAX14942 5kV Isolated 20Mbps Half-Duplex PROFIBUS/ RS-485 Transceivers with 35kV ESD Protection Absolute Maximum Ratings V to GNDA ......................................................-0.3V to +6V Continuous Power Dissipation (T = +70C) DDA A V to GNDB .......................................................-0.3V to +6V 16-pin W SOIC (derate 14.1mW/C DDB V to GNDB .....................................................-0.3V to +16V above +70C) .........................................................1126.8mW LDO TXD, DE, RE, PV to GNDA ....................................-0.3V to +6V Operating Temperature Range ......................... -40C to +105C SBA, RXD to GNDA ............................. -0.3V to (V + 0.3V) Junction Temperature ......................................................+150C DDA DEM to GNDB ...................................... -0.3V to (V + 0.3V) Storage Temperature Range ............................ -65C to +150C DDB A, B to GNDB ...........................................................-8V to +13V Lead Temperature (soldering, 10s) .................................+300C Short Circuit Duration (RXD, SBA to GNDA, Soldering Temperature (reflow) .......................................+260C A, B, DEM ,V to GNDB)..................................Continuous DDB Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability. Package Thermal Characteristics (Note 1) Junction-to-Ambient Thermal Resistance ( ) ..............71C/W Junction-to-Case Thermal Resistance ( ) ...................23C/W JA JC Note 1: Package thermal resistances were obtained using the method described in JEDEC specification JESD51-7, using a four-layer board. For detailed information on package thermal considerations, refer to www.maximintegrated.com/thermal-tutorial. DC Electrical Characteristics (V V = 1.71V to 5.5V, V V = 4.5V to 5.5V, T = T to T , unless otherwise noted. Typical values are DDA GNDA DDB GNDB A MIN MAX at V V = 3.3V, V V = 5V, V = V , and T = +25C.) (Notes 2, 3) DDA GNDA DDB GNDB GNDA GNDB A PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS POWER V 1.71 5.5 DDA Supply Voltage V V 4.5 5.5 DDB V = 5V, DE = high, RE = TXD = DDA I 4 6.6 DDA low, RXD unconnected, no bus load Supply Current mA DE = high, RE = TXD = low, RXD un- I 7.6 12.5 DDB connected, no bus load, V = 5V DDB V V rising 1.50 1.58 1.65 Undervoltage Lockout Thresh- UVLOA DDA V old V V rising 2.55 2.7 2.85 UVLOB DDB V 50 Undervoltage Lockout Thresh- UVHYSTA mV old Hysteresis V 200 UVHYSTB LDO LDO Supply Voltage V Relative to GNDB, LDO is on (Note 4) 4.68 14 V LDO DE = high, TXD = low, no bus load, LDO Supply Current I 7.7 12.9 mA LDO V = 5V LDO LDO Output Voltage V 4.5 5 5.5 V DDB LDO Current Limit 300 mA V = 5.68V, I = 20mA to LDO LOAD Load Regulation 0.19 1.7 mV/mA 40mA Line Regulation V = 5.68V to 14V, I = 20mA 0.12 1.8 mV/V LDO LOAD Maxim Integrated 2 www.maximintegrated.com