19-1077; Rev 0; 9/96 MAXIMA +15kV ESD-Protected, EMC-Compliant, 230kbps RS-232 Serial Port for Modems General Description The MAX3186 is a complete DCE RS-232 serial port designed to meet the stringent ESD requirements of the European community. All transmitter outputs and receiv- er inputs are protected to +15kV using IEC 1000-4-2 Air-Gap Discharge, +8kV using IEC 1000-4-2 Contact Discharge, and +15kV using the Human Bady Model. Tne MAX3186 has five RS-232 transmitters, three RS- 232 receivers, and no charge pump, optimizing it for operation in modem applications, {t is guaranteed to run at data rates up to 230kbps, providing compatibility with popular software for communicating with personal computers. Power-supply current is less than 300A for Ipp and igs, and less than 1mA for tcc. The MAX3186 is available in an SO package and in the tiny SSOP that further reduces board space. Features @ Enhanced ESD Protection: +15kVHuman Body Model #8kVIEC1000-4-2, Contact Discharge +15kVIEC1000-4-2, Air-Gap Discharge Latchup Free During an ESD Event 20-Pin SSOP or SO Packages Guaranteed 230kbps Data Rate Flow-Through Pinout Complete DCE Serial Port Applications Ordering Information Modems PART TEMP.RANGE _ PIN-PACKAGE ISDN Modems MAX3186CWP OC to+70C 2080 Instruments MAX3186CAP OC to +70C 20 SSOP MAXS186EWP -40C to +85C 20 SO Equipment Meeting IEC 1000-4-2 MAX3186EAP 40C to +85C 20 SSOP Typical Operating Circuit Pin Configuration MAXIMA FAAXLAA wAseteo MAX3185 TOP VIEW Ve hi RT Voo ce TOUT TiN TZ R2 RiIN R1OUT TTVEMOs fo RS-232 = TTLCMOS T20UT TIN LOGIC y Loar INTERCONNECTING 4 R2IN ROUT fide > AGIN RAOUT CABLE > T30UT T3IN 75, R5 T4OUT TAIN <j <ttH 150UT TSIN 1 Ve MMAXIAA GND 2 <ef+ $ MAX3186 Ra o<tf SO/SSOP MAAXLM For free samples & the latest literature: http:/www.maxim-ic.com, or phone 1-800-998-8800 98LEXVIN Maxim Integrated Products 2-115MAX3186 +15kV ESD-Protected, EMC-Compliant, 230kbps RS-232 Serial Port for Modems ABSOLUTE MAXIMUM RATINGS ceveeetteeeeeseuectccesecasneececcnseaeecanseenecsetarcesaesseresenacesaeed -0.3V to +7V -0.3V to +14V +0.3V to -14V deetasesceaecateenvevsecaseateaecarsetsecetecseasdesdeasscessenaesaenaees -0.3V to +6V veces ecenaeceseeacesascaceceesegessataseatesecselaeeecettesseieeassrseneenneaes +30V Output Voltages Tout Rout Short-Circuit Duration TOUT (One at A tHE). cc cseeteteteeeteeeeteeeeeseeees Continuous Rout (one at a time) .. Continuous Continuous Power Dissipation (Ta = +70C) Wide SO (derate 10.00mW/C above +70C)....00000.0.... SSOP (derate 8.00mW/C above +70C) 0... Operating Temperature Ranges MAX3186C_P oo cece cccccseeecetsreecsesteccesersesenense 0C to +70C MAX3186E_P oo. . Storage Temperature Range .......... Lead Temperature (soldering, 10sec) ... Stresses beyond those fisted 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. Expasure to absolute maximum rating conditions for extended periods may affect device reliability. ELECTRICAL CHARACTERISTICS (Vcc = +4.5V to +5.5V, Vop = +10.8V to +13.2V, Vsg = -10.8V to -13.2V, Ta = TIN to Tmax, unless otherwise noted. Typical values are at Ta = +26C.) 2-116 PARAMETER | SYMBOL | CONDITIONS MIN TYP = MAX | UNITS DC CHARACTERISTICS Vcc 4.5 5.5 Operating Voltage Range Vpp 10.8 13.2 Vv Vss 713.2 -10.8 foc No load 230 1000 Supply Current lob No load 280 750 pA Iss No load 280 750 Loaic Input Logic Threshoid Low VILT TIN 0.8 V Input Logic Threshold High VIHT Tin 2.0 V Input Leakage Current 0.01 1 yA Output Voltage Low VoLR Rout: Isink = 3.2mA 0.4 Vv Output Voltage High VouHR- | Rout: source = 1mA Vcc - 0.6 v TRANSMITTER OUTPUTS . Vop = 7.0V, Vsg = -7.0V, RL = 3kQ 45.0 Output Voltage Swing Vop = 12V, Veg 2 -42V. RL = SKQ 205 Transmitter Output Resistance Vcc = Vop = Vss = OV, VT_ouT = #2V 300 Q pe 232 Output Short-Circuit 35 +60 mA RECEIVER INPUTS Receiver Input Voltage -25 25 Vv Operating Range RS-232 input Threshold Low 0.75 Vv RS-232 input Threshold High 2.4 Vv RS-232 Input Hysteresis 0.65 Vv RS-232 Input Resistance 3 5 7 kQ Receiver Output Short-Circuit +10 mA Current FAAXLM+15kV ESD-Protected, EMC-Compliant, 230kbps RS-232 Serial Port for Modems ELECTRICAL CHARACTERISTICS (continued) (Voc = +4.5V to +5.5V, Vop = +10.8V to +13.2V, Vss = -10.8V to -13.2V, Ta = TMIN to Tmax, unless otherwise noted. Typical values are at TA = +25C.) PAAXLAA PARAMETER | SYMBOL | CONDITIONS MIN TYP MAX | UNITS ESD CHARACTERISTICS Human Body Model +15 ESD Protection IEC 1000-4-2 (Contact Discharge) +8 kV 16C1000-4-2 (Air-Gap Discharge) +15 TIMING CHARACTERISTICS Transmitter Output teLHT Vop = 12V, Vss =-12V, AL = 3kQ, 4 s Propagation Delay, Low to High u CL = 1000pF, Ta = +25C u Transmitter Output tut Vop = 12V, Vsg =-12V, RL = 3kQ, 4 5 Propagation Delay, Highto Low | PHLT | co = 1000pF, Ta = +25C u Transmitter Propagation Delay t Vop = 12V, Vss = -12V, Re = 3kqQ, 04 Skew, | tpLuT - tPHLT | SKT | Cy = 1000pF, Ta = +25C ul Vop = 12V, Vss = -12V, Ct = 150pF to 4 Ri = 3kQ to 7k2, 2500pF 30 Transition Output Slew Rate SR measured from +3V to -3V Vis or -3V to +3V, Figure 3, Ct = SOpF to 8 30 Ta = +25C 1000pF Receiver Output _ = = 9 Propagation Delay, Low to High teLHR | Voc = SV, CL = SOpF, Ta = +25C 4.0 us Receiver Output _ _ _ Propagation Delay, High to Low tein | Voc = SV, CL = SOpF, Ta = +25C 40 us Receiver Propagation Delay Vcc = 5V, CL = 50pF, Ta = +26C 0.4 Skew, | teLHA - tPHLA | tskR oc Le oeprs A= + Hs Voc = 5V, Vop = 12V, CL = 50pF to 120 Vg = -12V 2500pF Guaranteed Data Rate DR , kbps Ri = 3kQ to 7kQ, CL = 50pF to Ta = +25C 1000pF 230 2-117 98LEXVINNMAX3186 2-118 RS-232 Serial Port for Modems (Vcc = +5.0V, Vop = +12.0V, Vss = -12.0V, Ta = +25C, unless otherwise noted.) SUPPLY CURRENT vs. SUPPLY VOLTAGE 7 240kbps 20 OD. _ 1 'pp. < E 10 Floo, & AT DATA B 3 3kQ. + 2500pF LOAD zm 5 Flss, a 4 10 Figg, 15 Tiss, -20 25 10.80 1140 12.0 12.6 13.2 SUPPLY VOLTAGE (V} TRANSMITTER OUTPUT VOLTAGE vs. LOAD CAPACITANCE 12.5 S 100 au g 7.5 B 5.0 S$ 1 TRANSMITTER AT DATA ts 2.5 [4 TRANSMITTERS AT DATA RATE / 16 - 3k + Cy LOAD 5 0 & 25 E .50 = 2 -75 # 10.0 12.5 0 7000 =62000 3000 = 4000 = 5000 LOAD CAPACITANCE (pF) SUPPLY CUREENT (mA) SLEW RATE (V/us) SUPPLY CURRENT vs. LOAD CAPACITANCE Iss, 0 1000 2000 3000 4000 5000 LOAD CAPACITANCE (pF) TRANSMITTER OUTPUT VOLTAGE vs. LOAD CURRENT PER TRANSMITTER |e > os o 2 4 6 8 10 12 14 16 18 LOAD CURRENT PER TRANSMITTER (pF) SLEW RATE (V/us) SLEW RATE (ius) +15kV ESD-Protected, EMC-Compliant, 230kbps Typical Operating Characteristics SLEW RATE vs. LOAD CAPACITANCE 16 14 2 RISE 1 TRANSMITTER 240kbps. 4 TRANSMITTERS 15kbps 3kek + C, LOAD ee) 0 1000 2000 3000 4000 5000 LOAD CAPACITANCE (pF) SLEW RATE vs. TEMPERATURE 25 Was oe TOG 20 L FALL, 500pF RISE, 500pF S 55-36 -15 5 25 45 65 85 105 125 TEMPERATURE (C) Ie HE RISE, 2000pF 5 FALL, 2000pF- 0 PAAXIAA+15kV ESD-Protected, EMC-Compliant, 230kbps RS-232 Serial Port for Modems Pin Description PIN NAME FUNCTION 1 Voop Supply-Voltage Input, + 10.8V ta +13.2V 2,4,7,8,9 TIOQUT-T5SOUT Transmitter Outputs, swing between Vop and Vss 3,5,6 RiIN, R21N, R3IN Receiver Inputs 10 Vss Supply-Voltage Input, -10.8V to -13.2V 11 GND Ground. Connect to system ground. 12, 13, 14, 17, 19 TSIN-T1IN Transmitter Inputs 15, 16, 18 R30UT, R2ZOUT, RIOUT | Receiver Outputs, swing between GND and Vcc 20 Voc Supply-Voltage Input, +4.5V to +5.5V Ri 50M to 100M CHARGE-CURRENT LIMIT RESISTOR HIGH- VOLTAGI Cs oc 150pF SOURCE Rp 3302 DISCHARGE RESISTANCE DEVICE STORAGE UNDER CAPACITOR TEST Figure 1a. 1EC1000-4-2 ESD Test Model IPEAK rh VJ 10% | tr = 0.7ns to 118 ons $$ 60ns Se | - Figure 1b. 1EC1000-4-2 ESD Generator Current Waveform Detailed Description 215kV ESD Protection As with all Maxim devices, ESD-protection structures are incorporated on all pins to protect against electro- static discharges encountered during handling and assembly. The MAX3186 driver outputs and receiver inputs have extra protection against static electricity found in normal operation. Maxims engineers devel- oped state-of-the-art structures to protect these pins against ESD of +15kV, without damage. After an ESD event, the MAX3186 continues working without latchup. ESD protection can be tested in several ways. The transmitter outputs and the receiver inputs are charac- terized for protection to the following: 1) +15kV using the Human Body Model 2) +8kV using the Contact-Discharge Method specified in IEC1000-4-2 (formerly 1EC801-2) 3) +15kV using the Air-Gap Method specified in IEC 1000-4-2 (formerly [EC801-2) ESD Test Conditions ESD performance depends on a number of conditions. Contact Maxim for a reliability report that documents test setup, methodology, and results. 98bLEXVN 2-119 MAAXISAMAX3186 2-120 +15kV ESD-Protected, EMC-Compliant, 230kbps RS-232 Serial Port for Modems Human Body Model Figure 2a shows the Human Body Model, and Figure 2b shows the current waveform it generates when dis- charged into a low impedance. This model consists of a 100pF capacitor charged to the ESD voltage of inter- est, which is then discharged into the device through a 1.5kQ resistor. 1EC1000-4-2 The IEC1000-4-2 standard covers ESD testing and per- formance of finished equipment; it does not specifically refer to integrated circuits. The MAX3186 helps you design equipment that meets Level 4 (the highest level) of IEC 1000-4-2, without additional ESD-protection com- ponents. The main difference between tests done using the Human Body Model and 1EC1000-4-2 is higher peak current in IEC 1000-4-2. Because series resistance is lower in the IEC1000-4-2 ESD test modei (Figure 1a), the ESD withstand voltage measured to this standard is generally lower than measured using the Human Body Model. Figure 1b shows the current waveform for the +8kV IEC 1000-4-2 Level 4 ESD Contact-Discharge test. The Air-Gap test involves approaching the device with a charge probe. The Contact-Discharge method connects the probe to the device before the probe is energized. Machine Model The Machine Model for ESD testing uses a 200pF stor- age capacitor and zero-discharge resistance. It mimics the stress caused by handling during manufacturing and assembly. Of course, all pins (not just RS-232 inputs and outputs) require this protection during man- ufacturing. Therefore, the Machine Model is less rele- vant to the I/O ports than are the Human Body Model and [EC 1000-4-2. Applications Information Use proper layout to ensure other devices on your board are not damaged in an ESD strike. Currents as high as 60A can instantaneously pass into the ground, so be sure to minimize the ground-iead return path to the power supply. A separate return path to the power supply is recommend. Trace widths should be greater than 40 mils. Bypass Vcc, Vpb, and Vss with 0.1uF capacitors as close to the part as possible to ensure maximum ESD protection. Tie any transmitter inputs to GND or Vcc. No external protection diodes are needed because the MAX3186 is not sensitive to power-supply sequencing. CHARGE-CURRENT DISCHARGE LIMIT RESISTOR RESISTANCE HIGH- DEVICE VOLTAGE Cs STORAGE UNDER pc 100pF CAPACITOR TEST SOURCE PEAK-TO-PEAK RINGING (NOT DRAWN TO SCALE) 1p 100% if ' 90% | , AMPERES /| 36.8% 10% F- PN al 0 ta TIME t +t i to. CURRENT WAVEFORM j Figure 2a. Human Body ESD Test Model Figure 2b. Human Body Model Current Waveform PAAXLPA+15kV ESD-Protected, EMC-Compliant, 230kbps RS-232 Serial Port for Modems 3.0V DRIVER INPUT 1.5V ov Po q q PHL PLH ~\ Vou 3.3V Vour ov SIGNAL RL GENERATOR Figure 3. Slew-Rate Test Circuit and Timing Diagram MAAXLAMA Chip Topography Von = Vec T= am TI0UT 5 THIN RIN A10UT T20UT T2IN R2tN HH R20UT 0.181" RSIN HH R30UT (4.597mm) T30uT - ae TSIN TA0UT 4 T TAIN E { TS0UT - TSIN | ' T T Vss GND | 0.094" t {2.386mm) TRANSISTOR COUNT: 195 SUBSTRATE CONNECTED TO GND 2-121 98LEXVIN