MAX13450E/MAX13451E RS-485 Transceivers with Integrated 100/120 Termination Resistors General Description Benefits and Features The MAX13450E/MAX13451E are half-duplex and full- Easy Configuration of RS-422 and RS-485 Networks duplex RS-485/RS-422 transceivers. These devices fea- Up to 20Mbps (max) Data Rate ture internal 100I and 120I termination resistors. The Software/Pin-Selectable 100/120 Termination resistor values are pin selectable. A logic supply input Integrated, Switchable Resistors Eliminate the allows interfacing to logic levels down to +1.8V. Need for External Resistors or DIP Switches Driver Drives 100 Double Termination and The MAX13450E/MAX13451E feature strong drivers Supports Cat-5/Cat-6 and 24-AWG Cables specified to drive low-impedance lines found when a Pin-Selectable Slew-Rate Limiting Reduces EMI fully loaded bus, based on todays 100I characteristic for Data Rates Up to 500kbps impedance cable, is doubly terminated. Both devices 1/8 Unit Load Allows Up to 256 Transceivers On allow slew-rate limiting of the driver output to reduce EMI the Bus and reflections for data rates up to 500kbps. Designed to Perform in Harsh Environments The MAX13451E has a FAULT alarm indication output to Extended ESD Protection signal to the system that an error condition exists in the 30kV Human Body Model driver. The MAX13451E also features a logic inversion 15kV Air Gap Discharge per IEC 61000-4-2 function. The logic inversion allows phase reversal of the 7kV Contact Discharge per IEC 61000-4-2 A-B signals in case these are inadvertently connected Inverting of A, B Line Polarity (MAX13451E) Allows wrongly. Phase Reversal if Misconnected The MAX13450E/MAX13451E have 1/8-unit load receiver Thermal and Overcurrent Protection input impedance, allowing up to 256 transceivers on the Driver Fault Indication (MAX13451E) bus. All driver outputs are protected to Q30kV ESD using Fail-Safe Receivers the Human Body Model (HBM). -40C to +125C Temperature Range +4.5V to +5.5V Supply Voltage Range The MAX13450E/MAX13451E are available in a 14-pin TSSOP package and operate over the automotive -40NC Integrated Low-Voltage Logic Interface (Down to 1.8V) to +125NC temperature range. Interfaces with Small-Geometry ASICs and FPGA Applications Functional Diagram (MAX13451E) V V Industrial Control Systems L CC Portable Industrial Equipment Motor Control SRL MAX13451E Security Networks INV Medical Networks DI D FAULT Ordering Information/Selector Guide DE B HALF/FULL PART PIN-PACKAGE TERM LOGIC DUPLEX LOGIC-LEVEL MAX13450EAUD+ Full 14 TSSOP-EP* TRANSLATION MAX13451EAUD+ Half 14 TSSOP-EP* RE A Note: All devices are specified over the -40C to +125C RO operating temperature range. +Denotes a lead(Pb)-free/RoHS-compliant package. *EP = Exposed pad. TERM100 GND 19-5254 Rev 2 2/15MAX13450E/MAX13451E RS-485 Transceivers with Integrated 100/120 Termination Resistors Absolute Maximum Ratings (All voltages referenced to GND.) Continuous Power Dissipation (T = +70NC) A V , V ...................................................................-0.3V to +6V TSSOP (derate 25.6mW/NC above +70NC)................2051mW CC L DE, RE, DI, RO, TERM, TERM100, SRL ..... -0.3V to (V + 0.3V) Operating Temperature Range ....................... -40NC to +125NC L INV, FAULT ................................................. -0.3V to (V + 0.3V) Storage Temperature Range .......................... -65NC to +150NC L A, B, Z, Y ..................................................................-8V to +13V Junction Temperature ....................................................+150NC A to B (High-Z State) ......................................................... +14V Lead Temperature (soldering, 10s) ...............................+300NC B to A (High-Z State) ......................................................... +14V Soldering Temperature (reflow) ......................................+260NC Short-Circuit Duration (RO, Y, Z) to GND ................ Continuous Package Thermal Characteristics (Note 1) TSSOP Junction-to-Ambient Thermal Resistance (q ) ..........39C/W JA Junction-to-Case Thermal Resistance (q ) .................3C/W JC Note 1: Package thermal resistances were obtained using the method described in JEDEC specification JESD51-7, using a four-lay- er board. For detailed information on package thermal considerations, refer to www.maximintegrated.com/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 = +4.5V to +5.5V, V = +1.62V to V , T = T to T , unless otherwise noted. Typical values are at V = +5V, CC L CC A MIN MAX CC V = +1.8V, and T = +25NC.) (Note 2) L A PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS Supply Voltage V 4.5 5.5 V CC Logic Supply Voltage V 1.62 1.8 V V L CC 6 DE = RE = high, TERM = high, no load Supply Current I mA CC 12 DE = RE = low, TERM = low, no load Current into V , no load on RO, device not L Logic Supply Current I 2 FA L switching, DE = RE = high Current into V , DE = low, RE = TERM = CC 30 FA high Shutdown Current I SHDN Current into V , DE = low, RE = high, CC 8 mA TERM = low DRIVER R = 100I, Figure 1 (Note 3) 2.0 V DIFF CC Differential Driver Output V V OD R = 46I, Figure 1 (Note 3) 1.5 V DIFF CC Change in Magnitude of DV R = 100I or 46I, Figure 1 (Note 3) 0.2 V OD DIFF Differential Output Voltage Driver Common-Mode Output V R = 100I or 46I, Figure 1 (Note 3) V /2 3 V OC DIFF CC Voltage Change In Magnitude of DV R = 100I or 46I, Figure 1 (Note 3) 0.2 V OC DIFF Common-Mode Voltage 0V P V P +12V +280 Driver Short-Circuit Output OUT I mA OSD Current -7V P V P 0V -250 OUT Maxim Integrated 2 www.maximintegrated.com