MAX3080EMAX3089E 19-1800 Rev 1 5/06 15kV ESD-Protected,Fail-Safe,High-Speed (10Mbps), Slew-Rate-Limited RS-485/RS-422 Transceivers General Description Features The MAX3080EMAX3089E are 15kV electrostatic dis- ESD Protection for RS-485 I/O Pins charge (ESD)-protected, high-speed transceivers for RS- 15kV, Human Body Model 485/RS-422 communication that contain one driver and True Fail-Safe Receiver While Maintaining one receiver. These devices feature fail-safe circuitry, EIA/TIA-485 Compatibility which guarantees a logic-high receiver output when the receiver inputs are open or shorted. This means that the Enhanced Slew-Rate Limiting Facilitates receiver output will be a logic high if all transmitters on a Error-Free Data Transmission terminated bus are disabled (high impedance). The (MAX3080EMAX3085E/MAX3089E) MAX3080E/MAX3081E/MAX3082E feature reduced 1nA Low-Current Shutdown Mode (Except slew-rate drivers that minimize EMI and reduce reflec- MAX3081E/MAX3084E/MAX3087E) tions caused by improperly terminated cables, allowing error-free data transmission up to 115kbps. The Pin-Selectable Full/Half-Duplex Operation MAX3083E/MAX3084E/MAX3085E offer higher driver (MAX3089E) output slew-rate limits, allowing transmit speeds up to Phase Controls to Correct for Twisted-Pair 500kbps. The MAX3086E/MAX3087E/ MAX3088Es dri- Reversal (MAX3089E) ver slew rates are not limited, making transmit speeds up to 10Mbps possible. The MAX3089Es slew rate is Allow Up to 256 Transceivers on the Bus selectable between 115kbps, 500kbps, and 10Mbps by Applications driving a selector pin with a single three-state driver. All devices feature enhanced ESD protection. All transmitter RS-422/RS-485 Communications outputs and receiver inputs are protected to 15kV using the Human Body Model. Level Translators These transceivers typically draw 375A of supply Transceivers for EMI-Sensitive Applications current when unloaded, or when fully loaded with the dri- Industrial-Control Local Area Networks vers disabled. All devices have a 1/8-unit-load receiver input impedance Ordering Information that allows up to 256 transceivers on the bus. The MAX3082E/MAX3085E/MAX3088E are intended for half- PART TEMP. RANGE PIN-PACKAGE duplex communications, while the MAX3080E/MAX3081E/ MAX3080ECSD 0C to +70C 14 SO MAX3083E/MAX3084E/MAX3086E/MAX3087E are MAX3080ECPD 0C to +70C 14 Plastic DIP intended for full-duplex communications. The MAX3089E MAX3080EESD -40C to +85C 14 SO is selectable between half-duplex and full-duplex opera- MAX3080EEPD -40C to +85C 14 Plastic DIP tion. It also features independently programmable receiver and transmitter output phase via separate pins. Ordering Information continued at end of data sheet. Selector Guide Data Slew- Low- Receiver/ Quiescent Transceivers Industry- Half/Full Pin Part Rate Rate Power Driver Current On Standard Duplex Count (Mbps) Limited Shutdown Enable (A) Bus Pinout MAX3080E Full 0.115 Yes Yes Yes 375 256 14 75180 MAX3081E Full 0.115 Yes No No 375 256 8 75179 MAX3082E Half 0.115 Yes Yes Yes 375 256 8 75176 MAX3083E Full 0.5 Yes Yes Yes 375 256 14 75180 MAX3084E Full 0.5 Yes No No 375 256 8 75179 MAX3085E Half 0.5 Yes Yes Yes 375 256 8 75176 MAX3086E Full 10 No Yes Yes 375 256 14 75180 MAX3087E Full 10 No No No 375 256 8 75179 MAX3088E Half 10 No Yes Yes 375 256 8 75176 MAX3089E Selectable Selectable Selectable Yes Yes 375 256 14 75180* *Pin compatible with 75180, with additional features implemented using pins 1, 6, 8, and 13. Maxim Integrated Products 1 For free samples and the latest literature, visit www.maxim-ic.com or phone 1-800-998-8800. For small orders, phone 1-800-835-8769.15kV ESD-Protected,Fail-Safe,High-Speed (10Mbps), Slew-Rate-Limited RS-485/RS-422 Transceivers ABSOLUTE MAXIMUM RATINGS Supply Voltage (V ) ............................................................+7V Continuous Power Dissipation CC Control Input Voltage (RE, DE)...................-0.3V to (V + 0.3V) 8-Pin Plastic DIP (derate 9.09mW/C above +70C) ...727mW CC Special Input Voltage 8-Pin SO (derate 5.88mW/C above +70C)................471mW (H/F, SRL, TXP, RXP)..............................-0.3V to (V + 0.3V) 14-Pin Plastic DIP (derate 10.0mW/C above +70C) ....800mW CC Driver Input Voltage (DI).............................-0.3V to (V + 0.3V) 14-Pin SO (derate 8.33mW/C above +70C)..............667mW CC Driver Output Voltage (A, B, Y, Z)........................................13V Operating Temperature Ranges Receiver Input Voltage (A, B) ..............................................13V MAX308 EC ...................................................0C to +70C Receiver Input Voltage, Full Duplex (A, B) ..........................25V MAX308 EE ................................................-40C to +85C Receiver Output Voltage (RO)....................-0.3V to (V + 0.3V) Storage Temperature Range .............................-65C to +150C CC Lead Temperature (soldering, 10s) .................................+300C 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 = +5V 5%, T = T to T , unless otherwise noted. Typical values are at V = +5V and T = +25C.) (Note 1) CC A MIN MAX CC A PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS DRIVER Differential Driver Output V Figure 5 5 V OD1 (No Load) Figure 5, R = 50 (RS-422) 2.0 Differential Driver Output V V OD2 Figure 5, R = 27 (RS-485) 1.5 Change-in-Magnitude of Differential Output Voltage V Figure 5, R = 50 or R = 27 0.2 V OD (Note 2) Driver Common-Mode Output V Figure 5, R = 50 or R = 27 3 V OC Voltage Change-in-Magnitude of V Figure 5, R = 50 or R = 27 0.2 V OC Common-Mode Voltage (Note 2) Input High Voltage V DE, DI, RE, H/F, TXP, RXP 2.0 V IH1 Input Low Voltage V DE, DI, RE, H/F, TXP, RXP 0.8 V IL1 MAX3080EMAX3085E, and MAX3089E with DI Input Hysteresis V 100 mV HYS SRL = V or unconnected CC I DE, DI, RE 2 IN1 SRL Input Current A I H/F, TXP, RXP, internal pulldown 10 40 IN2 Input High Voltage V SRL V - 0.8 V IH2 CC Input Middle Voltage V SRL (Note 3) 0.4V 0.6V V IM2 CC CC Input Low Voltage V SRL 0.8 V IL2 SRL = V 75 CC SRL Input Current I A IN3 SRL = GND (Note 3) -75 V = 12V 125 IN DE = GND, Input Current (A and B) I A IN4 V = GND or 5.25V CC V = -7V -75 IN V = 12V 125 IN Output Leakage (Y and Z) DE = GND, I A O Full Duplex V = GND or 5.25V CC V = -7V -100 IN -7V V V -250 OUT CC Driver Short-Circuit Output V 0V V 12V 250 mA OD1 OUT Current (Note 4) 0V V V 25 OUT CC 2 MAX3080EMAX3089E