MAX13485E/MAX13486E 19-0742 Rev 0 1/07 Half-Duplex RS-485/RS-422 Transceivers in DFN General Description Features The MAX13485E/MAX13486E +5V, half-duplex, 15kV +5V Operation ESD-protected RS-485 transceivers feature one driver True Fail-Safe Receiver While Maintaining and one receiver. These devices include fail-safe circuitry, EIA/TIA-485 Compatibility guaranteeing a logic-high receiver output when receiver Hot-Swappable for Telecom Applications inputs are open or shorted. The receiver outputs a logic- high if all transmitters on a terminated bus are disabled Enhanced Slew-Rate Limiting Facilitates Error- (high impedance). The MAX13485E/MAX13486E include Free Data Transmission (MAX13485E) a hot-swap capability to eliminate false transitions on the High-Speed Version (MAX13486E) Allows for bus during power-up or live-insertion. Transmission Speeds Up to 16Mbps The MAX13485E features reduced slew-rate drivers Extended ESD Protection for RS-485/RS-422 I/O that minimize EMI and reduce reflections caused by Pins 15kV Using Human Body Model improperly terminated cables, allowing error-free trans- 1/4 Unit Load, Allowing Up to 128 Transceivers on mission up to 500kbps. The MAX13486E driver slew the Bus rate is not limited, allowing transmit speeds up to 16Mbps. Available in Space-Saving 8-Pin DFN or Industry Standard 8-Pin SO Packages The MAX13485E/MAX13486E feature a 1/4-unit load receiver input impedance, allowing up to 128 transceivers Ordering Information/ on the bus. These devices are intended for half-duplex communications. All driver outputs are protected to 15kV Selector Guide ESD using the Human Body Model. The MAX13485E/ MAX13486E are available in 8-pin SO and space-saving PIN- SLEW-RATE PKG PART 8-pin DFN packages. The devices operate over the PACKAGE LIMITED CODE extended -40C to +85C temperature range. MAX13485EELA+T 8 DFN Yes L822-1 MAX13485EESA+ 8 SO Yes S8-2 Applications MAX13486EELA+T 8 DFN No L822-1 Utility Meters MAX13486EESA+ 8 SO No S8-2 Industrial Controls +Denotes a lead-free package. Industrial Motor Drives Note: All devices are specified over the -40C to +85C operating temperature range. Automated HVAC Systems Pin Configurations TOP VIEW V B A GND CC 87 65 MAX13485E DE MAX13486E + 0.1F + 12 3 4 1 8 V RO CC R D DI 2 7 B B RO RE DE DI RE Rt Rt DFN 3 6 DE A A 4 5 + DI D R RO RO 1 R 8 V CC GND SO RE 2 7 B MAX13485E RE DE 3 6 A MAX13486E DI 4 D 5 GND SO Maxim Integrated Products 1 For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct at 1-888-629-4642, or visit Maxims website at www.maxim-ic.com.Half-Duplex RS-485/RS-422 Transceivers in DFN ABSOLUTE MAXIMUM RATINGS (All voltages referenced to GND.) Operating Temperature Range ...........................-40C to +85C V ........................................................................................+6V Junction Temperature......................................................+150C CC DE, RE, DI.................................................................-0.3V to +6V Storage Temperature Range .............................-65C to +150C A, B ..............................................................................-8V to 13V Lead Temperature (soldering, 10s) .................................+300C Short-Circuit Duration (RO, A, B) to GND ..................Continuous Continuous Power Dissipation (T = +70C) A 8-Pin SO (derate 5.9mW/C above +70C)..................471mW 8-Pin DFN (derate 4.8mW/C above +70C) ..........380.6mW 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.) (Notes 1, 2) CC A MIN MAX CC A PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS DRIVER R = 100, Figure 1 2.0 V DIFF CC Differential Driver Output V R = 54, Figure 1 1.5 V OD DIFF No load V CC Change in Magnitude of V R = 100 or 54, Figure 1 (Note 3) 0.2 V OD DIFF Differential Output Voltage Driver Common-Mode Output V CC V R = 100 or 54, Figure 1 3V OC DIFF Voltage / 2 Change in Magnitude of V R = 100 or 54, Figure 1 (Note 3) 0.2 V OC DIFF Common-Mode Voltage Input-High Voltage V DI, DE, RE 2.0 V IH Input-Low Voltage V DI, DE, RE 0.8 V IL Input Current I DI, DE, RE 1 A IN 0V < V < +12V +50 +250 OUT Driver Short-Circuit Output I mA OSD Current (Note 4) -7V < V < 0V -250 -50 OUT (V - 1V) < V < +12V 20 Driver Short-Circuit Foldback CC OUT I mA OSDF Output Current Note 3) -7V < V < 0V -20 OUT RECEIVER V = +12V 250 DE = GND, V = GND IN CC Input Current (A and B) I A A, B or +5V V = -7V -200 IN Receiver-Differential-Threshold V -7V < V < +12V -200 -50 mV TH CM Voltage Receiver Input Hysteresis V V + V = 0V 25 mV TH A B V - CC Output-High Voltage V I = -1.6mA, V - V > V V OH O A B TH 1.5 2 MAX13485E/MAX13486E