MAX3465MAX3469 19-3038 Rev 3 5/12 +5V, Fail-Safe, 40Mbps, Profibus RS-485/ RS-422 Transceivers General Description Features The MAX3465MAX3469 are high-speed differential Recommended for Profibus Applications bus transceivers for RS-485 and RS-422 communica- Up to 40Mbps Data Rate tions. They are designed to meet TIA/EIA-422-B, TIA/EIA-485-A, V.11, and X.27 standards. The trans- 15ns Transmitter Propagation Delay ceiver complies with the Profibus specification provid- 20ns Receiver Propagation Delay ing +2.1V minimum output level with a 54 load, 2ns Transmitter and Receiver Skew 40Mbps data rate, and output skew less than 2ns. Each part contains one three-state differential line driver and High Differential Driver Output Level (2.1V on 54) one differential input line receiver. The devices operate Hot-Swap Versions from a +5V supply and feature true fail-safe circuitry, which guarantees a logic-high receiver output when the 1A Shutdown Supply Current receiver inputs are open or shorted. This enables all Low Supply Current Requirements (2.5mA, typ) receiver outputs on a terminated bus to output logic highs when all transmitters are disabled. Allow Up to 128 Transceivers on the Bus All devices feature a 1/4-standard-unit load receiver True Fail-Safe Receiver while Maintaining EIA/TIA- input impedance that allows 128 transceivers on the 485 Compatibility bus. Driver and receiver propagation delays are guar- Designed for Multipoint Transmissions on Long anteed under 20ns for multidrop, clock distribution or Noisy Bus Lines applications. Drivers are short-circuit current limited and are protected against excessive power dissipation Full-Duplex and Half-Duplex Versions Available by thermal-shutdown circuitry. The driver and receiver Phase Controls to Correct for Twisted-Pair feature active-high and active-low enables, respective- Reversal for 14-Pin Versions ly, that can be connected together externally to serve as a direction control. Current-Limiting and Thermal Shutdown for Driver Overload Protection Ordering Information Applications PART TEMP RANGE PIN-PACKAGE High-Speed RS-485 Communications MAX3465CSD 0C to +70C 14 SO High-Speed RS-422 Communications MAX3465CPD 0C to +70C 14 Plastic DIP MAX3465ESD -40C to +85C 14 SO Level Translators MAX3465EPD -40C to +85C 14 Plastic DIP Industrial-Control Local Area Networks Ordering Information continued at end of data sheet. Profibus Applications Devices are also available in a lead(Pb)-free/RoHS-compliant package. Specify lead-free by adding + to the part number when ordering. Pin Configurations appear at end of data sheet. Selector Guide RECEIVER/ LOW- RECEIVER/ PART HALF/FULL INDEPENDENT DRIVER POWER HOT SWAP DRIVER PHASE PIN COUNT NUMBER DUPLEX SHDN PIN ENABLE SHUTDOWN SELECT MAX3465 Full Yes Yes Yes Yes Yes 14 MAX3466 Full Yes Yes No Yes Yes 14 MAX3467 Full No No No No No 8 MAX3468 Half Yes Yes Yes No No 8 MAX3469 Half Yes Yes No No No 8 For pricing, delivery, and ordering information, please contact Maxim Direct 1 at 1-888-629-4642, or visit Maxims website at www.maxim-ic.com.+5V, Fail-Safe, 40Mbps, Profibus RS-485/ RS-422 Transceivers ABSOLUTE MAXIMUM RATINGS Supply Voltage (V ) to GND ..................................-0.3V to +6V SO (derate 8.33mW/C above +70C).........................667mW CC Control Input Voltage (RE, DE, DI, SHDN, TXP, RXP) DIP (derate 10mW/C above +70C) ...........................800mW to GND....................................................-0.3V to (V + 0.3V) Operating Temperature Range CC Driver Output Voltage (Y, Z) to GND.........................-8V to +13V MAX346 C ......................................................0C to +70C MAX346 E ....................................................-40C to +85C Receiver Input Voltage (A, B) to GND.......................-8V to +13V Junction Temperature......................................................+150C Differential Driver Output Voltage (Y - Z)...............................8V Storage Temperature Range .............................-65C to +150C Differential Receiver Input (A - B)..........................................8V Lead Temperature (soldering, 10s) .................................+300C Receiver Output Voltage (RO) to GND.......-0.3V to (V + 0.3V) CC Soldering Temperature (reflow) Output Driver Current (Y, Z) ...........................................250mA Lead(Pb)-Free..............................................................+260C Continuous Power Dissipation (T = +70C) A Containing Lead(Pb)....................................................+240C SO (derate 5.88mW/C above +70C).........................471mW DIP (derate 9.09mW/C above +70C) ........................727mW 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. 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 Power-Supply Range V 4.75 5.25 V CC DRIVER Differential Driver Output V Figure 5, R = V V OD CC (No Load) Differential Driver Output V Figure 5, R = 27 2.1 V OD Change in Magnitude of V Figure 5, R = 50 or 27 (Note 2) 0.2 V OD Differential Output Voltage Driver Common-Mode Output V Figure 5, R = 50 or 27 3V OC Voltage Change in Magnitude of V Figure 5, R = 50 or 27 (Note 2) 0.2 V OC Common-Mode Voltage Input High Voltage V DE, DI, RE, SHDN 2.0 V IH Input Low Voltage V DE, DI, RE, SHDN 0.8 V IL Input Hysteresis V DE, DI, RE, SHDN 50 mV HYS V = +12V +125 IN Output Leakage (Y and Z) Full DE = GND, V = CC I A O Duplex GND or +5.25V V = -7V -100 IN Input Current I DI, RE, DE, SHDN 1A IN Pulldown Current RXP = TXP = V 515 30 A CC 0 V +12V, output low +250 Driver Short-Circuit Output OUT I mA OSD Current (Note 3) -7V V V , output high -250 OUT CC (V - 1V) V +12V, output low +25 CC OUT Driver Short-Circuit Foldback I mA OSFD Output Current (Note 3) -7V V +1V, output high -25 OUT Thermal Shutdown Threshold 140 C RECEIVER Differential Input Capacitance C Between A and B 8 pF A, B V = +12V +250 Input Current (A and B) Full DE = GND, IN I A A, B Duplex V = GND or +5.25V CC V = -7V -200 IN 2 MAX3465MAX3469