MAX13410EMAX13415E 19-1058 Rev 1 8/09 RS-485 Transceiver with Integrated Low-Dropout Regulator and AutoDirection Control General Description Features The MAX13410EMAX13415E are half-duplex RS-485-/RS- Wide +6V to +28V Input Supply Range 422-compatible transceivers optimized for isolated appli- +5V Output Supplies Up to 20mA to External cations. These devices feature an internal low-dropout Circuitry regulator (LDO), one driver, and one receiver. The inter- Internal LDO nal LDO allows the part to operate from an unregulated power supply of up to 28V. The AutoDirection feature Low 65A (typ) Shutdown Supply Current reduces the number of optical isolators needed in isolat- Extended ESD Protection ed applications. Other features include enhanced ESD 15kV Human Body Model (MAX13412E/ protection, fail-safe circuitry, slew-rate limiting, and full- MAX13413E) speed operation. 14kV Human Body Model (MAX13410E/ The MAX13410EMAX13415E internal LDO generates a MAX13411E) 5V 10% power supply that is used to power its internal 1/8-Unit Load, Allowing Up to 256 Transceivers on circuitry. The MAX13412EMAX13415E bring the 5V to an the Bus output V that allows the user to power additional REG external circuitry with up to 20mA to further reduce exter- -40C to +85C Operating Temperature Range nal components. The MAX13410E/MAX13411E do not Fail-Safe have a 5V output and come in industry-compatible pinouts. This allows easy replacement in existing designs. Slew-Rate Limited and Full-Speed Versions Up to 16Mbps Data Rate on Full-Speed Versions The MAX13410EMAX13415E feature a 1/8-unit load receiver input impedance, allowing up to 256 trans- ceivers on the bus. All driver outputs are ESD protected using the Human Body Model. These devices also Applications include fail-safe circuitry (MAX13410E/MAX13411E/ Isolated RS-485 Interfaces- Industrial Equipment MAX13414E/MAX13415E only), guaranteeing a logic- high receiver output when the receiver inputs are open Utility Meters Telecomm Equipment or shorted. The receiver outputs a logic-high when the transmitter on the terminated bus is disabled (high Pin Configurations impedance). The MAX13412E/MAX13413E feature Maxims propri- TOP VIEW etary AutoDirection control. This architecture eliminates the need for the DE and RE control signals. In isolated + RO 1 8 V CC applications, this reduces the cost and size of the sys- tem by reducing the number of optical isolators required. RE 2 7 B The MAX13410E/MAX13412E/MAX13414E feature MAX13410E DE 3 MAX13411E 6 A reduced slew-rate drivers that minimize EMI and reduce reflections caused by improperly terminated cables, DI 4 *EP 5 GND allowing error-free transmission up to 500kbps. The MAX13411E/MAX13413E/MAX13415E are not slew-rate SO limited, allowing transmit speeds up to 16Mbps. *EXPOSED PAD CONNECTED TO GROUND The MAX13410EMAX13415E are available in an 8-pin SO package with an exposed paddle to improve power dissipation, and operate over the extended -40C to Pin Configurations continued at end of data sheet. +85C temperature range. Ordering Information/Selector Guide PART PIN-PACKAGE AutoDirection DATA RATE (max) 5V LDO OUTPUT MAX13410EESA+ 8 SO-EP* No 500kbps No MAX13411EESA+ 8 SO-EP* No 16Mbps No Note: All devices operate over the -40C to +85C operating *EP = Exposed pad. temperature range. Ordering Information/Selector Guide continued at end of data +Denotes a lead(Pb)-free/RoHS-compliant package. sheet. Maxim Integrated Products 1 For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642, or visit Maxims website at www.maxim-ic.com.RS-485 Transceiver with Integrated Low-Dropout Regulator and AutoDirection Control ABSOLUTE MAXIMUM RATINGS (All voltages referenced to GND.) Operating Temperature Range ...........................-40C to +85C V .........................................................................-0.3V to +30V Storage Temperature Range ............................-65C to +150C CC RE, DE/RE, DE, DI, RO, V ..................................-0.3V to +6V Junction Temperature......................................................+150C REG A, B............................................................................-8V to +13V (Note 1)...................................................................52.0C/W JA Short-Circuit Duration (RO, A, B) to GND ................. Continuous (Note 1).....................................................................6.0C/W JC Continuous Power Dissipation (T = +70C) Lead Temperature (soldering, 10s) ................................+300C A 8-Pin SO-EP (derate 19.2mW/C above +70C) ........1539mW Note 1: Package thermal resistances were obtained using the method described in JEDEC specificactions JESD51-7 using a four layer board. For detailed information on package consitencies refer to www.maxim-ic/thermal-tutorial. 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 = +6.0V to +28V, T = T to T , unless otherwise noted. Typical values are at V = +7.5V, C = 1F, and T = +25C.) (Note 2) CC A MIN MAX CC S A PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS Supply Voltage V (Note 3) 6.0 28.0 V CC V = +7.5V, I = 20mA 4.5 5 5.5 CC LOAD LDO Output Voltage V V REG V = +28V, I = 0mA 4.5 5 5.5 CC LOAD LDO Output Current I V > +7.5V 20 mA REG CC LDO Dropout Voltage V V = +5V, I = 20mA 0.5 V DO CC OUT Guaranteed by design, Minimum Bypass Capacitor on V C 1F REG S MAX13412EMAX13415E RE, DE = high/no load 10 (MAX13410E/MAX13411E) Supply Current I mA CC RE, DE/RE = high, DI = low/no load 10 (MAX13412EMAX13415E) DE = low, RE = high Shutdown Current I 45 A SHDN (MAX13410E/MAX13411E) Thermal-Shutdown Threshold T +150 C TS Thermal-Shutdown Threshold T 15 C TSH Hysteresis DRIVER R = 100, Figure 1 2.0 5.5 DIFF Differential Driver Output V R = 54, Figure 1 1.5 5.5 V OD DIFF No load 5.5 Change in Magnitude of Differential V R = 100 or 54, Figure 1 0.2 V OD DIFF Output Voltage Driver Common-Mode Output Voltage V R = 100 or 54, Figure 1 1 3 V OC DIFF Change In Magnitude of Common- V R = 100 or 54, Figure 1 0.2 V OC DIFF Mode Voltage Input High Voltage V DI, DE, RE, DE/RE 2.0 V IH Input Low Voltage V DI, DE, RE, DE/RE 0.8 V IL Input Current I DI, DE, RE, DE/RE 1 A IN Driver-Disable Threshold V T = +25C (MAX13412E/MAX13413E) 0.6 1.0 V DT A 2 MAX13410EMAX13415E