19-1186; Rev 1; 10/98 15kV ESD-Protected, EMC-Compliant, 230kbps, Dual RS-232 Serial Port for Motherboards/Desktops ____________________________Features The MAX3187 complete, dual DTE RS-232 serial port meets the stringent ESD requirements of the European Community. All transmitter outputs and receiver 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 Body Model. Enhanced ESD Protection: 15kV--Human Body Model 8kV--IEC 1000-4-2, Contact Discharge 15kV--IEC 1000-4-2, Air-Gap Discharge The MAX3187's six RS-232 transmitters and ten RS-232 receivers require no charge pump. Guaranteed to run at data rates up to 230kbps, the MAX3187 is optimized for desktop PC and motherboard applications, and is compatible with popular software for PC communications. Power-supply current is less than 1mA for I DD and ISS, and less than 3mA for ICC. The MAX3187 is available in a space-saving 36-pin SSOP package. 36-Pin SSOP Package ________________________Applications Latchup Free During an ESD Event Guaranteed 230kbps Data Rate Flow-Through Pinout Two Complete DTE Serial Ports 6 RS-232 Drivers and 10 RS-232 Receivers ______________Ordering Information PART TEMP. RANGE PIN-PACKAGE Desktop PC MAX3187CAX 0C to +70C 36 SSOP Motherboards MAX3187EAX -40C to +85C 36 SSOP Instruments Typical Operating Circuit appears at end of data sheet. Equipment Meeting IEC 1000-4-2 ____________________________________________________________Pin Configuration TOP VIEW R1OUT 1 36 R1IN R2OUT 2 35 R2IN R3OUT 3 34 R3IN T1IN 4 33 T1OUT T2IN 5 R4OUT 6 MAX3187 32 T2OUT 31 R4IN T3IN 7 30 T3OUT R5OUT 8 29 R5IN VCC 9 28 VDD VSS 10 27 GND 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: http://www.maxim-ic.com, or phone 1-800-998-8800 For small orders, phone 1-800-835-8769. MAX3187 _______________General Description MAX3187 15kV ESD-Protected, EMC-Compliant, 230kbps, Dual RS-232 Serial Port for Motherboards/Desktops ABSOLUTE MAXIMUM RATINGS VCC ...........................................................................-0.3V to +7V VDD .........................................................................-0.3V to +14V VSS......................................................................... +0.3V to -14V Input Voltages T_IN ......................................................................-0.3V to +6V R_IN .................................................................................30V Output Voltages T_OUT..............................................................................15V R_OUT ....................................................-0.3V to (VCC + 0.3V) Short-Circuit Duration T_OUT (one at a time) ............................................Continuous R_OUT (one at a time)............................................Continuous Continuous Power Dissipation (TA = +70C) SSOP (derate 11.76mW/C above +70C) ..................762mW Operating Temperature Ranges MAX3187CAX .....................................................0C to +70C MAX3187EAX ..................................................-40C to +85C Storage Temperature Range ............................-65C to +160C 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 (VCC = +4.5V to +5.5V, VDD = +10.8V to +13.2V, VSS = -10.8V to -13.2V, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25C.) PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS DC CHARACTERISTICS VCC Operating Voltage Range 4.5 5.5 VDD 10.8 13.2 VSS -13.2 -10.8 ICC No load 750 3000 IDD No load 370 1000 ISS No load 370 1000 Input Logic Threshold Low VILT T_IN Input Logic Threshold High VIHT T_IN Supply Current V A LOGIC Input Leakage Current VOLR R_OUT; ISINK = 3.2mA Output Voltage High VOHR R_OUT; ISOURCE = 1mA V 1 A 0.4 V V 0.01 Output Voltage Low 0.8 2.0 VCC - 0.6 V TRANSMITTER OUTPUTS Output Voltage Swing Transmitter Output Resistance VDD = 7.0V, VSS = -7.0V, RL = 3k 5.0 VDD = 12V, VSS = -12V, RL = 3k 9.5 VCC = VDD = VSS = 0, VT_OUT = 2V 300 RS-232 Output Short-Circuit Current V 35 60 mA 25 V RECEIVER INPUTS Receiver Input Voltage Range -25 RS-232 Input Threshold Low 0.75 V RS-232 Input Threshold High RS-232 Input Hysteresis RS-232 Input Resistance Receiver Output Short-Circuit Current 2 2.4 V 7 k 0.65 3 5 10 _______________________________________________________________________________________ V mA 15kV ESD-Protected, EMC-Compliant, 230kbps, Dual RS-232 Serial Port for Motherboards/Desktops (VCC = +4.5V to +5.5V, VDD = +10.8V to +13.2V, VSS = -10.8V to -13.2V, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25C.) PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS ESD CHARACTERISTICS Human Body Model ESD Protection 15 IEC 1000-4-2 (Contact Discharge) 8 IEC 1000-4-2 (Air-Gap Discharge) 15 kV TIMING CHARACTERISTICS Transmitter Output Propagation Delay, Low to High tPLHT VDD = 12V, VSS = -12V, RL = 3k, CL = 1000pF, TA = +25C 4 s Transmitter Output Propagation Delay, High to Low tPHLT VDD = 12V, VSS = -12V, RL = 3k, CL = 1000pF, TA = +25C 4 s Transmitter Propagation Delay Skew, | tPLHT - tPHLT | tSKT VDD = 12V, VSS = -12V, RL = 3k, CL = 1000pF, TA = +25C 0.4 s SR VDD = 12V, VSS = -12V, RL = 3k to 7k, measured from +3V to -3V or -3V to +3V, Figure 1, TA = +25C Transition Output Slew Rate CL = 150pF to 2500pF 4 30 CL = 50pF to 1000pF 8 30 V/s Receiver Output Propagation Delay, Low to High tPLHR VCC = 5V, CL = 50pF, TA = +25C 4.0 s Receiver Output Propagation Delay, High to Low tPHLR VCC = 5V, CL = 50pF, TA = +25C 4.0 s Receiver Propagation Delay Skew, | tPLHR - tPHLR | tSKR VCC = 5V, CL = 50pF, TA = +25C 0.4 s DR VCC = 5V, VDD = 12V, VSS = -12V, RL = 3k to 7k, TA = +25C, any two transmitters switching Guaranteed Data Rate Mouse Driveability CL = 50pF to 2500pF 120 CL = 50pF to 1000pF 230 kbps T3OUT = -5mA, T1OUT = T2OUT = 5mA 7.5 V _______________________________________________________________________________________ 3 MAX3187 ELECTRICAL CHARACTERISTICS (continued) __________________________________________Typical Operating Characteristics (VCC = +5V, VDD = +12V, VSS = -12V, TA = +25C, unless otherwise noted.) 20 IDD, 20kbps ICC VCC = 5V 2 TRANSMITTERS AT DATA RATE ISS, 20kbps 4 TRANSMITTERS AT DATA RATE/16 3k + CLOAD -10 ISS, 120kbps IDD, 120kbps 20 ICC 2 TRANSMITTERS AT DATA RATE 0 4 TRANSMITTERS AT DATA RATE/16 3k + CLOAD ISS, 20kbps -10 ISS, 120kbps -20 -30 -40 12.0 12.6 0 13.2 3000 4000 1000 2000 3000 4000 240kbps -7.5 120kbps MAX3187/TOC-05 10 1000 2000 3000 4000 LOAD CAPACITANCE (pF) 5000 20 VOUT+ 5 T1 VOUT+ 0 T2 -5 VCC VOUTVOUT- T3 5000 FALL, 500pF 15 RISE, 500pF 10 RISE, 2000pF 5 -10 -15 -12.5 25 SLEW RATE (V/ms) -2.5 15 TRANSMITTER OUTPUT VOLTAGE (V) MAX3187/TOC-04 SLEW RATE vs. TEMPERATURE 2 TRANSMITTER, 240kbps 4 TRANSMITTERS, 15kbps 3k + CLOAD 0 0 5000 TRANSMITTER OUTPUT VOLTAGE vs. LOAD CURRENT PER TRANSMITTER 240kbps -10.0 2000 TRANSMITTER OUTPUT VOLTAGE vs. LOAD CAPACITANCE 7.5 -5.0 1000 LOAD CAPACITANCE (pF) 120kbps 0 0 LOAD CAPACITANCE (pF) 10.0 2.5 2 TRANSMITTERS AT DATA RATE 4 TRANSMITTERS AT DATA RATE/16 3k + CLOAD SUPPLY VOLTAGE (V) 12.5 5.0 6 2 -40 11.4 8 4 -30 10.8 FALL 10 ISS, 240kbps ISS, 240kbps 4 12 IDD, 20kbps 10 RISE 14 MAX3187/TOC-06 -20 30 SUPPLY CURRENT (mA) SUPPLY CURRENT (mA) IDD, 120kbps IDD, 240kbps SLEW RATE (V/s) 30 16 MAX3187/TOC-01 IDD, 240kbps 0 40 MAX3187/TOC-02 40 10 SLEW RATE vs. LOAD CAPACITANCE SUPPLY CURRENT vs. LOAD CAPACITANCE MAX3187/TOC-03 SUPPLY CURRENT vs. SUPPLY VOLTAGE TRANSMITTER OUTPUT VOLTAGE (V) MAX3187 15kV ESD-Protected, EMC-Compliant, 230kbps, Dual RS-232 Serial Port for Motherboards/Desktops FALL, 2000pF 0 0 2 4 6 8 10 12 14 16 LOAD CURRENT PER TRANSMITTER (mA) 18 -55 -35 -15 5 25 45 65 TEMPERATURE (C) _______________________________________________________________________________________ 85 105 125 15kV ESD-Protected, EMC-Compliant, 230kbps, Dual RS-232 Serial Port for Motherboards/Desktops PIN NAME FUNCTION 1, 2, 3, 6, 8, 11, 12, 13, 16, 18 R1OUT-R10OUT 4, 5, 7, 14, 15, 17 T1IN-T6IN 9 VCC Supply-Voltage Input, 4.5V to 5.5V 10 VSS Supply-Voltage Input, -10.8V to -13.2V 27 GND Ground. Connect system to ground. 28 VDD Supply-Voltage Input, 10.8V to 13.2V 19, 21, 24, 25, 26, 29, 31, 34, 35, 36 R10IN-R1IN 20, 22, 23, 30, 32, 33 T6OUT-T1OUT Receiver Outputs, swing between GND and VCC Transmitter Inputs Receiver Inputs Transmitter Outputs, swing between VDD and VSS _______________Detailed Description 15kV ESD Protection 3.0V DRIVER INPUT 0V 1.5V tPHL tPLH VOH 3.3V 3.0V VOUT 0V -3.0V -3.3V tF2 tR2 tF1 tR1 VOL SIGNAL GENERATOR RL CL As with all Maxim devices, ESD-protection structures are incorporated on all pins to protect against electrostatic discharges (ESD) encountered during handling and assembly. The MAX3187 driver outputs and receiver inputs have extra protection against static electricity found in normal operation. Maxim's engineers developed state-of-the-art structures to protect these pins against 15kV ESD, without damage. After an ESD event, the MAX3187 continues working without latchup. ESD protection can be tested in several ways. The transmitter outputs and receiver inputs are characterized for protection to the following: 1) 15kV using the Human Body Model 2) 8kV using the Contact-Discharge Method specified in IEC 1000-4-2 (formerly IEC 801-2) 3) 15kV using the Air-Gap Method specified in IEC 1000-4-2 (formerly IEC 801-2) ESD Test Conditions ESD performance depends on a number of conditions. Contact Maxim for a reliability report that documents test setup, methodology, and results. Figure 1. Slew-Rate Test Circuit and Timing Diagram _______________________________________________________________________________________ 5 MAX3187 ______________________________________________________________Pin Description MAX3187 15kV ESD-Protected, EMC-Compliant, 230kbps, Dual RS-232 Serial Port for Motherboards/Desktops RC 1M CHARGE-CURRENT LIMIT RESISTOR RD 1500 IP 100% 90% DISCHARGE RESISTANCE Ir PEAK-TO-PEAK RINGING (NOT DRAWN TO SCALE) AMPERES HIGHVOLTAGE DC SOURCE Cs 100pF STORAGE CAPACITOR DEVICE UNDER TEST 36.8% 10% 0 0 Figure 2a. Human Body ESD Test Model CHARGE-CURRENT LIMIT RESISTOR HIGHVOLTAGE DC SOURCE Cs 150pF Figure 2b. Human Body Model Current Waveform I 100% 90% RD 330 DISCHARGE RESISTANCE STORAGE CAPACITOR tDL CURRENT WAVEFORM IPEAK RC 50M to 100M TIME tRL DEVICE UNDER TEST 10% tr = 0.7ns to 1ns t 30ns 60ns Figure 3a. IEC 1000-4-2 ESD Test Model Figure 3b. IEC 1000-4-2 ESD-Generator Current Waveform Human Body Model Figure 2a shows the Human Body Model, and Figure 2b shows the current waveform it generates when discharged into a low impedance. This model consists of a 100pF capacitor charged to the ESD voltage of interest, which is then discharged into the device through a 1.5k resistor. helps you design equipment that meets Level 4 (the highest level) of IEC 1000-4-2, without additional ESDprotection components. The main difference between tests done using the Human Body Model and IEC 1000-4-2 is higher peak current in IEC 1000-4-2. Because series resistance is lower in the IEC 1000-4-2 ESD test model (Figure 3a), the ESD withstand voltage measured to this standard is generally lower than that measured using the Human Body Model. Figure 3b 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. IEC 1000-4-2 Since January 1996, all equipment manufactured and/or sold in the European community has been required to meet the stringent IEC 1000-4-2 specification. The IEC 1000-4-2 standard covers ESD testing and performance of finished equipment; it does not specifically refer to integrated circuits. The MAX3187 6 _______________________________________________________________________________________ 15kV ESD-Protected, EMC-Compliant, 230kbps, Dual RS-232 Serial Port for Motherboards/Desktops __________Typical Operating Circuit 0.1F +5V +12V VCC VDD 0.1F 0.1F MAX3187 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 ground, so be sure to minimize the ground-lead 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, VDD, and VSS with 0.1F capacitors as close to the part as possible to ensure maximum ESD protection. Connect any unused transmitter inputs to GND or VCC. The MAX3187 is not sensitive to power-supply sequencing, and therefore requires no external protection diodes. +5V +12V VCC VDD MAX3186 T1 R1 R2 T2 RS-232 TTL/CMOS LOGIC I/O 0.1F T3 TTL/CMOS LOGIC I/O R3 INTERCONNECTING T1 R1 CABLE R2 T2 R3 T3 R4 T4 R5 T5 V+ T4 V+ T5 VSS -12V 0.1F V- T6 ___________________Chip Information GND TX R6 MOUSE R7 TRANSISTOR COUNT: 419 R8 R9 R10 GND VSS -12V 0.1F _______________________________________________________________________________________ 7 MAX3187 Machine Model The Machine Model for ESD testing uses a 200pF storage 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 manufacturing. Therefore, the Machine Model is less relevant to the I/O ports than are the Human Body Model and IEC 1000-4-2. ________________________________________________________Package Information SSOP.EPS MAX3187 15kV ESD-Protected, EMC-Compliant, 230kbps, Dual RS-232 Serial Port for Motherboards/Desktops Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied. Maxim reserves the right to change the circuitry and specifications without notice at any time. 8 _____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 (c) 1998 Maxim Integrated Products Printed USA is a registered trademark of Maxim Integrated Products. Mouser Electronics Authorized Distributor Click to View Pricing, Inventory, Delivery & Lifecycle Information: Maxim Integrated: MAX3187CAX+ MAX3187CAX+T