MAX13085E 19-6016 Rev 0 10/11 +5.0V, 15kV ESD-Protected, Fail-Safe, Hot-Swap, RS-485/RS-422 Transceiver General Description Features The MAX13085E +5.0V, 15kV ESD-protected, RS-485/ S +5.0V Operation RS-422 transceiver features one driver and one receiver. S Extended ESD Protection for RS-485/RS-422 I/O The device includes fail-safe circuitry, guaranteeing Pins 15kV Human Body Model a logic-high receiver output when receiver inputs are S True Fail-Safe Receiver While Maintaining open or shorted. The receiver outputs a logic-high if all EIA/TIA-485 Compatibility transmitters on a terminated bus are disabled (high S Hot-Swap Input Structures on DE and RE impedance). The MAX13085E includes a hot-swap capability to eliminate false transitions on the bus during S Enhanced Slew-Rate Limiting Facilitates Error- power-up or hot insertion. Free Data Transmission The MAX13085E features reduced slew-rate drivers S Low-Current Shutdown Mode that minimize EMI and reduce reflections caused by S Allow Up to 256 Transceivers on the Bus improperly terminated cables, allowing error-free data S Available in Industry-Standard 8-Pin SO and PDIP transmission up to 500kbps. Packages The MAX13085E is ideal for half-duplex communications and it draws 1.2mA of supply current when unloaded or when fully loaded with the drivers disabled. The MAX13085E has a 1/8-unit load receiver input imped- ance, allowing up to 256 transceivers on the bus. The MAX13085E is available in an 8-pin SO and PDIP packages. Applications Ordering Information Utility Meters PART TEMP RANGE PIN-PACKAGE Lighting Systems MAX13085EESA+ -40NC to +85NC 8 SO Industrial Control +Denotes a lead(Pb)-free/RoHS-compliant package. Telecom Security Systems Instrumentation Profibus Typical Operating Circuit 0.1F MAX13085E DE + 1 8 DI V CC RO R D B B 2 7 RE Rt Rt 3 6 DE A A 4 5 RO DI D R GND RE TYPICAL HALF-DUPLEX OPERATING CIRCUIT Maxim Integrated Products 1 For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642, or visit Maxims website at www.maxim-ic.com.+5.0V, 15kV ESD-Protected, Fail-Safe, Hot-Swap, RS-485/RS-422 Transceiver ABSOLUTE MAXIMUM RATINGS (All voltages referenced to GND.) Continuous Power Dissipation (T = +70C) A Supply Voltage (V ) ........................................................... +6V SO (derate 5.9mW/C above +70C) ..........................471mW CC Control Input Voltage (RE, DE) ...............................-0.3V to +6V Operating Temperature Range .......................... -40C to +85C Driver Input Voltage (DI) .........................................-0.3V to +6V Junction Temperature .....................................................+150C Driver Output Voltage (A, B) ....................................-8V to +13V Storage Temperature Range ............................ -65C to +150C Receiver Input Voltage (A, B) ..................................-8V to +13V Lead Temperature (soldering, 10s) ................................+300C Receiver Output Voltage (RO) ................. -0.3V to (V + 0.3V) Soldering Temperature (reflow) ......................................+260C CC Driver Output Current .................................................... 250mA 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. DC ELECTRICAL CHARACTERISTICS (V = +5.0V 10%, T = T to T , unless otherwise noted. Typical values are at V = +5.0V and T = +25NC.) (Note 1) CC A MIN MAX CC A PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS DRIVER V Supply-Voltage Range V 4.5 5.5 V CC CC R = 100I (RS-422), Figure 1 3 V L CC Differential Driver Output V R = 54I (RS-485), Figure 1 2 V V OD L CC No load V CC Change in Magnitude of DV R = 100I or 54I, Figure 1 (Note 2) 0.2 V OD L Differential Output Voltage Driver Common-Mode Output V R = 100I or 54I, Figure 1 V /2 3 V OC L CC Voltage Change in Magnitude of DV R = 100I or 54I, Figure 1 (Note 2) 0.2 V OC L Common-Mode Voltage Input-High Voltage V 3 V IH DE, DI, RE Input-Low Voltage V 0.8 V IL DE, DI, RE Input Hysteresis V 100 mV HYS DE, DI, RE Input Current I DE, DI, RE Q1 FA IN1 Input Impedance First Transition R 3.65 8.8 kI PWUP V , V = V = 2V DE RE RE at Power-Up Input Impedance on First R 7 60 k ft V = V = 2V DE RE Transition after POR Delay 0 P V P +12V (Note 3) 40 250 Driver Short-Circuit Output OUT I mA OSD Current -250 -40 -7V P V P V (Note 3) OUT CC 20 Driver Short-Circuit Foldback (V - 1V) P V P +12V (Note 3) CC OUT I mA OSDF Output Current -7V P V P +1V (Note 3) -20 OUT Thermal-Shutdown Threshold T 175 NC TS Thermal-Shutdown Hysteresis T 15 NC TSH V = +12V 125 V = 0V, IN DE Input Current (A and B) I FA A, B V = 0V or V CC CC V = -7V -100 IN RECEIVER Receiver Differential Threshold V -7V P V P +12V -200 -125 -50 mV TH CM Voltage Receiver Input Hysteresis DV V + V = 0V 15 mV TH A B 2 MAX13085E