EVALUATION KIT AVAILABLE MAX14775E/MAX14776E 65V Fault Protected 500kpbs/20Mbps Half-Duplex RS-485/RS-422 Transceivers General Description Benefits and Features The MAX14775E/MAX14776E fault-protected RS-485/ Integrated Protection Ensures for Robust RS-422 transceivers feature 65V protection for overvoltage Communication signal faults on communication bus lines, ensuring 65V Fault Protection Range on Driver Outputs/ communication in harsh industrial environments. Receiver Inputs Each device contains one driver and one receiver and 25V Common Mode Range on the Receiver Inputs Large Receiver Hysteresis Increases Noise Tolerance operates over the 3V to 5.5V supply range. The MAX14775E is optimized for high-speed data rates up Hot-Swap Protection Thermal Shutdown to 20Mbps. The MAX14776E features slew-rate limited outputs for data rates up to 500kbps. High-Performance Transceiver Enables Flexible Designs These transceivers are optimized for robust communication Compliant with RS-485 EIA/TIA-485 Standard in noisy environments. A large 200mV (typ) hysteresis on 20Mbps (MAX14775E)/500kbps (MAX14776E) receiver inputs ensure for high noise rejection and a fail- Maximum Data Rate safe feature guarantees a logic-high on the receiver output 3V to 5.5V Supply Range when the inputs are open or shorted. Driver outputs are Up to 100 Devices on the Bus protected against short-circuit conditions. The MAX14775E/MAX14776E receivers feature a 1/3- Applications unit load input impedance, allowing up to 100 transceivers Industrial Field Bus Networks on a bus. Motion Controllers The MAX14775E/MAX14776E are available in 8-pin HVAC SOIC and 8-pin TDFN-EP packages and operate over the -40C to +125C temperature range. Ordering Information appears at end of data sheet. Selector Guide PART NUMBER MAX DATA RATE PIN-PACKAGE MAX14775EASA+ 20Mbps 8 SOIC MAX14775EATA+ 20Mbps 8 TDFN-EP MAX14776EASA+ 500kbps 8 SOIC MAX14776EATA+ 500kbps 8TDFN-EP 19-8614 Rev 0 9/16MAX14775E/MAX14776E 65V Fault Protected 500kpbs/20Mbps Half-Duplex RS-485/RS-422 Transceivers Absolute Maximum Ratings (All voltages referenced to GND) Continuous Power Dissipation (T = +70C) A V ........................................................................-0.3V to +6V 8-pin SOIC (derate 7.60mW/C above +70C) ........606.1mW CC RO ............................................................-0.3V to (V + 0.3V) 8-pin TDFN (derate 24.4mW/C above +70C) ......1951.2mW CC DE, DI, RE ...............................................................-0.3V to +6V Operating Temperature Range ......................... -40C to +125C A, B (I = 1mA) ..............................................-70V to +70V Junction Temperature ......................................................+150C MAX Short-Circuit Duration (RO, A, B) ..............................Continuous Storage Temperature Range ............................ -65C to +150C Lead Temperature (soldering, 10s) .................................+300C Soldering Temperature (reflow) .......................................+260C 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) SOIC TDFN Junction-to-Ambient Thermal Resistance ( ) .......132C/W Junction-to-Ambient Thermal Resistance ( ) .........41C/W JA JA Junction-to-Case Thermal Resistance ( ) .............38C/W Junction-to-Case Thermal Resistance ( ) ...............8C/W JC 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 = 3.0V to 5.5V, T = T to T , unless otherwise noted. Typical values are at V = 3.3V and T = +25C.) (Note 2) CC A MIN MAX CC A PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS POWER Supply Voltage V 3.0 5.5 V CC DE = high, RE = low, no load, no Supply Current I 3 5.3 mA CC switching Shutdown Supply Current I DE = high, RE = low 4 A SH Shutdown Short-Circuit Supply A or B shorted to 65V, DE = high, I 240 A SHDN SHRT Current RE = low DRIVER R = 54, Figure 1a 1.5 L Differential Driver Output V V OD R = 100, Figure 1a 2.0 L Change in Magnitude of Differ- V R = 100 or 54, Figure 1a (Note 3) -0.2 +0.2 V OD L ential Driver Output Voltage Driver Common-Mode Output V R = 100 or 54, Figure 1a V / 2 3 V OC L CC Voltage Change in Magnitude of V R = 100 or 54, Figure 1a (Note 3) -0.2 +0.2 V OC L Common-Mode Voltage Single-Ended Driver Output A and B outputs, output is high, V V -0.2 V OH CC Voltage High I = 3mA SOURCE Single-Ended Driver Output A and B outputs, output is low, V 0.2 V OL Voltage Low I = 3mA SINK Driver Short-Circuit Output -65V V V < 0V or V < V A or B CC A or I 200 mA OSD1 Current V +65V (Note 4) B Maxim Integrated 2 www.maximintegrated.com