MAX3483AE/MAX3485AE/ +3.3V-Powered, 20kV ESD-Protected, MAX3488AE/MAX3490AE/ 20Mbps and Slew-Rate-Limited MAX3491AE RS-485/RS-422 Transceivers General Description Benefits and Features Integrated Protection Increases Robustness Devices in the MAX3483AE family (MAX3483AE/ High ESD Protection MAX3485AE/MAX3488AE/MAX3490AE/MAX3491AE) 20kV HBM ESD per JEDEC JS-001-2012 are 20kV ESD-protected RS-485/422 transceivers, 15kV Air Gap per IEC 61000-4-2 optimized for extended cable runs in noisy environments. 8kV Contact ESD per IEC 61000-4-2 All devices operate from a single 3.3V supply. Short-Circuit Protected Outputs The MAX3483AE and MAX3485AE are half-duplex transceivers. The MAX3488AE, MAX3490AE, and MAX3491AE are True Fail-Safe Receiver Prevents False Transition full-duplex transceivers. The MAX3483AE/85AE have a on Receiver Input Short or Open Events 1-unit load receiver input impedance, allowing up to 32 Hot-Swap Capability Eliminates False Transitions transceivers on the bus. The MAX3488AE/90AE/91AE During Power-Up or Hot Insertion have a 1/4-unit load receiver input impedance, allowing up High -Speed Data Rates up to 20Mbps to 128 transceivers on the bus. Each transceiver includes a fail-safe receiver, ensuring that the receiver output (RO) Up to -40C to +125C Operating Temperature is high when inputs are shorted, open, or connected to a Allow s Up to 128 Transceiver s on the Bus three-state bus. All devices feature enhanced electrostatic discharge (ESD) Applications protection. All transmitter outputs and receiver inputs are Industrial-Control Local Area Networks protected to 20kV HBM ESD, 15kV Air-Gap ESD and Transceivers for EMI-Sensitive Applications 8kV Contact ESD in accordance to IEC 61000-4-2. Telecommuncations The MAX3483AE, MAX3485AE, MAX3488AE, and MAX3490AE are available in industry standard 8-pin SO Ordering Information appears at end of data sheet. package, while the MAX3491AE is available in a 14-pin SO package. Functional Diagram 19-8506 Rev 1 9/17MAX3483AE/MAX3485AE/ +3.3V-Powered, 20kV ESD-Protected, MAX3488AE/MAX3490AE/ 20Mbps and Slew-Rate-Limited MAX3491AE RS-485/RS-422 Transceivers Absolute Maximum Ratings (Voltages referenced to GND.) V ..................................................................... -0.3V to +4.0V Junction Temperature ...................................................... +150C CC RO ............................................................ -0.3V to (V + 0.3V) Storage Temperature Range ............................ -65 C to +150C CC RE, DE, DI ............................................................ -0.3V to +4.0V Continuous Power Dissipation (T = +70C) A A, B, Y, Z ............................................................ -9.0V to +13.0V 8 SO (derate at 7.6mW/C above +70C) ................... 606mW Short-Circuit Duration (RO, A, B, Y, Z) to GND .........Continuous 14 SO (derate at 11.9mW/C above +70C) ............... 952mW Operating Temperature Range Lead Temperatur e (soldering, 10s) ................................. +300C MAX3483AE/85AE/88AE/90AE/91AE .......... -40C to +125C Soldering Temperature (reflow) ...................................... +260C MAX3488AE/90AE ....................................... -40C to +105C 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-Case Thermal Resistance ( ) Junction-to-Ambient Thermal Resistance ( ) JC JA 8-pin SO ...................................................................... 38C/W 8-pin SO .................................................................... 132C/W 14-pin SO .................................................................... 34C/W 14-pin SO .................................................................... 84C/W 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. Electrical Characteristics (V = +3.0V to +3.6V, T = T to T , unless otherwise specified. Typical values are at V = +3.3V and T = +25C.) (Notes 2, 3) CC A MIN MAX CC A PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS POWER SUPPLY Supply Voltage V 3.0 3.6 V CC DE = V , RE = GND, no load 1.9 4 CC Supply Current I mA CC DE = 0, RE = 0, no load, DI = 0 or V 1.2 4.0 CC Shutdown Supply Current I DE = GND, RE = V , MAX3483AE/85AE/91AE 10 A SHDN CC DRIVER V = 3V, R = 100, Figure 1 2.0 CC L Differential Driver Output V V OD V = 3V, R = 54, Figure 1 1.5 CC L Change in Magnitude of Differential V R = 54 or 100, Figure 1 (Note 4) -0.2 +0.2 V OD L Output Voltage Driver Common-Mode Output Voltage V R = 54 or 100, Figure 1 V /2 3 V OC L CC Change in Magnitude of Common- V R = 54 or 100, Figure 1 (Note 4) -0.2 +0.2 V OC L Mode Voltage V Single-Ended Driver Output High A or B output, I = -20mA 2.2 V OH A or B Single-Ended Driver Output Low V A or B output, I = 20mA 0.8 V OL A or B V = -7V -250 mA OUT I Driver Short-Circuit Output Current OSD V = +12V 250 mA OUT Maxim Integrated 2 www.maximintegrated.com