MAX3187 19-1186 Rev 1 10/98 15kV ESD-Protected, EMC-Compliant, 230kbps, Dual RS-232 Serial Port for Motherboards/Desktops General Description Features The MAX3187 complete, dual DTE RS-232 serial port Enhanced ESD Protection: meets the stringent ESD requirements of the European 15kVHuman Body Model Community. All transmitter outputs and receiver inputs 8kVIEC 1000-4-2, Contact Discharge are protected to 15kV using IEC 1000-4-2 Air-Gap 15kVIEC 1000-4-2, Air-Gap Discharge Discharge, 8kV using IEC 1000-4-2 Contact Discharge, and 15kV using the Human Body Model. Latchup Free During an ESD Event The MAX3187s six RS-232 transmitters and ten RS-232 36-Pin SSOP Package receivers require no charge pump. Guaranteed to run Guaranteed 230kbps Data Rate at data rates up to 230kbps, the MAX3187 is optimized for desktop PC and motherboard applications, and is Flow-Through Pinout compatible with popular software for PC communica- Two Complete DTE Serial Ports tions. Power-supply current is less than 1mA for I DD and I , and less than 3mA for I . SS CC 6 RS-232 Drivers and 10 RS-232 Receivers The MAX3187 is available in a space-saving 36-pin SSOP package. Ordering Information Applications PART TEMP. RANGE PIN-PACKAGE Desktop PC MAX3187CAX 0C to +70C 36 SSOP MAX3187EAX -40C to +85C 36 SSOP Motherboards Instruments Typical Operating Circuit appears at end of data sheet. Equipment Meeting IEC 1000-4-2 Pin Configuration R1OUT 1 36 R1IN TOP VIEW R2OUT 2 35 R2IN R3OUT 3 34 R3IN T1IN 4 33 T1OUT T2IN 5 32 T2OUT MAX3187 R4OUT 6 31 R4IN T3IN 7 30 T3OUT R5OUT 8 29 R5IN V 9 28 V CC DD V 10 27 GND SS R6OUT 11 26 R6IN R7OUT 12 25 R7IN R8OUT 13 24 R8IN T4IN 14 23 T4OUT T5IN 15 22 T5OUT R90UT 16 21 R9IN T6IN 17 20 T6OUT R10OUT 18 19 R10IN SSOP Maxim Integrated Products 1 For free samples & the latest literature: 15kV ESD-Protected, EMC-Compliant, 230kbps, Dual RS-232 Serial Port for Motherboards/Desktops ABSOLUTE MAXIMUM RATINGS V ...........................................................................-0.3V to +7V Short-Circuit Duration CC V .........................................................................-0.3V to +14V T OUT (one at a time)............................................Continuous DD V ......................................................................... +0.3V to -14V R OUT (one at a time)............................................Continuous SS Input Voltages Continuous Power Dissipation (T = +70C) A T IN ......................................................................-0.3V to +6V SSOP (derate 11.76mW/C above +70C) ..................762mW R IN .................................................................................30V Operating Temperature Ranges Output Voltages MAX3187CAX .....................................................0C to +70C T OUT..............................................................................15V MAX3187EAX ..................................................-40C to +85C R OUT....................................................-0.3V to (V + 0.3V) Storage Temperature Range ............................-65C to +160C CC Lead Temperature (soldering, 10sec) ............................+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. ELECTRICAL CHARACTERISTICS (V = +4.5V to +5.5V, V = +10.8V to +13.2V, V = -10.8V to -13.2V, T = T to T , unless otherwise noted. Typical values CC DD SS A MIN MAX are at T = +25C.) A PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS DC CHARACTERISTICS V 4.5 5.5 CC Operating Voltage Range V 10.8 13.2 V DD V -13.2 -10.8 SS I No load 750 3000 CC Supply Current I No load 370 1000 A DD I No load 370 1000 SS LOGIC Input Logic Threshold Low V T IN 0.8 V ILT Input Logic Threshold High V T IN 2.0 V IHT Input Leakage Current 0.01 1 A Output Voltage Low V R OUT I = 3.2mA 0.4 V OLR SINK Output Voltage High V R OUT I = 1mA V - 0.6 V OHR SOURCE CC TRANSMITTER OUTPUTS V = 7.0V, V = -7.0V, R = 3k 5.0 DD SS L Output Voltage Swing V V = 12V, V = -12V, R = 3k 9.5 DD SS L Transmitter Output Resistance V = V = V = 0, V = 2V 300 CC DD SS T OUT RS-232 Output Short-Circuit 35 60 mA Current RECEIVER INPUTS Receiver Input Voltage Range -25 25 V RS-232 Input Threshold Low 0.75 V RS-232 Input Threshold High 2.4 V RS-232 Input Hysteresis 0.65 V RS-232 Input Resistance 3 5 7 k Receiver Output Short-Circuit 10 mA Current 2 MAX3187