MAX14780E +5.0V, 30kV ESD-Protected, Fail-Safe, Hot-Swap, RS-485/RS-422 Transceiver General Description Benefits and Features The MAX14780E is a +5V, 30kV HBM ESD half duplex Integrated Protection Increases Robustness RS-485/422 transceiver. S 30kV HBM ESD per JEDEC JS-001-2012 S 12kV Contact ESD per IEC 61000-4-2 The MAX14780E features reduced slew-rate drivers that S 15kV Air Gap ESD per IEC 61000-4-2 minimize EMI and reduce reflections caused by improp- S True Fail-Safe Receiver Prevents False erly terminated cables, allowing error-free data transmis- Transitions on Receiver Input Short or Open sion up to 500kbps. S Hot Swap Eliminates False Transitions During The MAX14780E is available in an 8-pin SO and PDIP Power-Up or Hot Insertion packages operating over a temperature range from S Short-Circuit Protected Outputs Low Current -40C to +85C. Reduces Power Consumption Low Current Reduces Power Consumption Applications S 10A Shutdown Current Utility Meters S 1.2mA of Supply Current When Unloaded Lighting Systems Ordering Information Industrial Control PART TEMP RANGE PIN-PACKAGE Telecom MAX14780EESA+ -40NC to +85NC 8 SO Security Systems MAX14780EEPA+ -40NC to +85NC 8 PDIP Instrumentation +Denotes a lead(Pb)-free/RoHS-compliant package. Typical Operating Circuit 0.1F DE MAX14780E + 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 For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642, or visit Maxims website at www.maximintegrated.com. 19-5652 Rev 3 1/15MAX14780E +5.0V, 30kV 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 PDIP (derate 9.1mW/C above +70C) .....................727.3mW Driver Input Voltage (DI) .........................................-0.3V to +6V Operating Temperature Range .......................... -40C to +85C Driver Output Voltage (A, B) ....................................-8V to +13V Junction Temperature .....................................................+150C Receiver Input Voltage (A, B) ..................................-8V to +13V Storage Temperature Range ............................ -65C to +150C Receiver Output Voltage (RO) ................. -0.3V to (V + 0.3V) Lead Temperature (soldering, 10s) ................................+300C CC Driver Output Current .................................................... 250mA 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. 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 DE, RE = RE = 2V at Power-Up Input Impedance on First R 7 60 k ft DE = RE = 2V 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 Maxim Integrated