19-1077; Rev 0; 9/96 ±15kV ESD-Protected, EMC-Compliant, 230kbps RS-232 Serial Port for Modems ________________________Applications ____________________________Features ♦ Enhanced ESD Protection: ±15kV—Human Body Model ±8kV—IEC1000-4-2, Contact Discharge ±15kV—IEC1000-4-2, 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 ______________Ordering Information Modems ISDN Modems Instruments Equipment Meeting IEC1000-4-2 __________Typical Operating Circuit MAX3186 MAX3185 T1 R1 TTL/CMOS LOGIC I/O TTL/CMOS LOGIC I/O R3 INTERCONNECTING R4 T4 MAX3186CAP MAX3186EWP MAX3186EAP 0°C to +70°C -40°C to +85°C -40°C to +85°C R5 PIN-PACKAGE 20 SO 20 SSOP 20 SO 20 SSOP __________________Pin Configuration VDD 1 20 VCC T1OUT 2 19 T1IN 18 R1OUT T2OUT 4 17 T2IN R2IN 5 16 R2OUT 15 R3OUT R3IN 6 CABLE T5 0°C to +70°C R1IN 3 RS-232 T3 TEMP. RANGE TOP VIEW R2 T2 PART MAX3186CWP T3OUT 7 14 T3IN T4OUT 8 13 T4IN T1 T5OUT 9 12 T5IN R2 T2 VSS 10 R3 T3 R1 MAX3186 11 GND SO/SSOP ________________________________________________________________ Maxim Integrated Products 1 For free samples & the latest literature: http://www.maxim-ic.com, or phone 1-800-998-8800 MAX3186 _______________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 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. The MAX3186 has five RS-232 transmitters, three RS232 receivers, and no charge pump, optimizing it for operation in modem applications. It 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 300µA for IDD and ISS, and less than 1mA for ICC. The MAX3186 is available in an SO package and in the tiny SSOP that further reduces board space. MAX3186 ±15kV ESD-Protected, EMC-Compliant, 230kbps RS-232 Serial Port for Modems ABSOLUTE MAXIMUM RATINGS VCC ...........................................................................-0.3V to +7V VDD .........................................................................-0.3V to +14V VSS..........................................................................+0.3V to -14V Input Voltages TIN .........................................................................-0.3V to +6V RIN ....................................................................................±30V Output Voltages TOUT ..................................................................................±15V ROUT ........................................................-0.3V to (VCC + 0.3V) Short-Circuit Duration TOUT (one at a time)................................................Continuous ROUT (one at a time) ...............................................Continuous Continuous Power Dissipation (TA = +70°C) Wide SO (derate 10.00mW/°C above +70°C)...............800mW SSOP (derate 8.00mW/°C above +70°C) .....................640mW Operating Temperature Ranges MAX3186C_P .......................................................0°C to +70°C MAX3186E_P ....................................................-40°C to +85°C Storage Temperature Range ............................-65°C to +160°C Lead Temperature (soldering, 10sec) ............................+300°C 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 = +25°C.) PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS DC CHARACTERISTICS Operating Voltage Range VCC 4.5 5.5 VDD 10.8 13.2 VSS -13.2 -10.8 ICC No load 230 1000 IDD No load 280 750 ISS No load 280 750 Input Logic Threshold Low VILT TIN Input Logic Threshold High VIHT TIN Supply Current V µA LOGIC Input Leakage Current VOLR ROUT; ISINK = 3.2mA Output Voltage High VOHR ROUT; ISOURCE = 1mA V 1 µA 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 = 3kΩ ±5.0 VDD = 12V, VSS = -12V, RL = 3kΩ ±9.5 VCC = VDD = VSS = 0V, VT_OUT = ±2V 300 RS-232 Output Short-Circuit Current V Ω ±35 ±60 mA 25 V RECEIVER INPUTS Receiver Input Voltage Operating 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 kΩ 0.65 3 5 ±10 _______________________________________________________________________________________ V mA ±15kV ESD-Protected, EMC-Compliant, 230kbps RS-232 Serial Port for Modems (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 = +25°C.) PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS ESD CHARACTERISTICS Human Body Model ESD Protection ±15 IEC1000-4-2 (Contact Discharge) ±8 IEC1000-4-2 (Air-Gap Discharge) ±15 kV TIMING CHARACTERISTICS Transmitter Output Propagation Delay, Low to High tPLHT VDD = 12V, VSS = -12V, RL = 3kΩ, CL = 1000pF, TA = +25°C 4 µs Transmitter Output Propagation Delay, High to Low tPHLT VDD = 12V, VSS = -12V, RL = 3kΩ, CL = 1000pF, TA = +25°C 4 µs Transmitter Propagation Delay Skew, | tPLHT - tPHLT | tSKT VDD = 12V, VSS = -12V, RL = 3kΩ, CL = 1000pF, TA = +25°C 0.4 µs SR VDD = 12V, VSS = -12V, RL = 3kΩ to 7kΩ, measured from +3V to -3V or -3V to +3V, Figure 3, TA = +25°C Transition Output Slew Rate CL = 150pF to 2500pF 4 30 CL = 50pF to 1000pF 8 30 V/µs Receiver Output Propagation Delay, Low to High tPLHR VCC = 5V, CL = 50pF, TA = +25°C 4.0 µs Receiver Output Propagation Delay, High to Low tPHLR VCC = 5V, CL = 50pF, TA = +25°C 4.0 µs Receiver Propagation Delay Skew, | tPLHR - tPHLR | tSKR VCC = 5V, CL = 50pF, TA = +25°C 0.4 µs DR VCC = 5V, VDD = 12V, VSS = -12V, RL = 3kΩ to 7kΩ, TA = +25°C Guaranteed Data Rate CL = 50pF to 2500pF 120 CL = 50pF to 1000pF 230 kbps _______________________________________________________________________________________ 3 MAX3186 ELECTRICAL CHARACTERISTICS (continued) __________________________________________Typical Operating Characteristics (VCC = +5.0V, VDD = +12.0V, VSS = -12.0V, TA = +25°C, unless otherwise noted.) SUPPLY CURRENT vs. SUPPLY VOLTAGE 5 ICC 1 TRANSMITTER AT DATA RATE 4 TRANSMITTERS AT DATA RATE / 16 0 3kΩ + 2500pF LOAD -5 ISS, 20kbps -10 ISS, 120kbps -15 ISS, 240kbps ICC 0 1 TRANSMITTER AT DATA RATE 4 TRANSMITTERS AT DATA RATE / 16 3kΩ + CL LOAD -5 ISS, 20kbps -10 ISS, 120kbps -15 12.6 13.2 SUPPLY VOLTAGE (V) 1000 2000 3000 4000 LOAD CAPACITANCE (pF) TRANSMITTER OUTPUT VOLTAGE vs. LOAD CAPACITANCE TRANSMITTER OUTPUT VOLTAGE vs. LOAD CURRENT PER TRANSMITTER 120kbps 10.0 240kbps 0 -2.5 -5.0 240kbps T1 VOUT+ T2 VOUT- -5 VCC VOUT- T3 120kbps 1000 2000 3000 4000 LOAD CAPACITANCE (pF) 4000 25 20 5000 FALL, 500pF 15 RISE, 500pF 10 5 -10 -15 -12.5 0 3000 RISE, 2000pF -7.5 -10.0 5 0 2000 SLEW RATE vs. TEMPERATURE VOUT+ 1 TRANSMITTER AT DATA RATE 4 TRANSMITTERS AT DATA RATE / 16 3kΩ + CL LOAD 2.5 10 1000 LOAD CAPACITANCE (pF) SLEW RATE (V/µs) 5.0 1 TRANSMITTER 240kbps 4 TRANSMITTERS 15kbps 3kΩ + CL LOAD 0 5000 15 SLEW RATE (V/µs) 7.5 RISE 6 0 0 MAX3186-TOC05 12.5 12.0 8 2 -25 11.40 MAX3186-TOC04 -25 10.80 FALL 10 4 ISS, 240kbps -20 -20 4 5 14 12 IDD, 20kbps 10 MAX3186-TOC03 IDD, 20kbps IDD, 120kbps MAX3186-TOC06 10 15 SLEW RATE (V/µs) IDD, 120kbps IDD, 240kbps 20 16 MAX3186-TOC02 15 SLEW RATE vs. LOAD CAPACITANCE 25 SUPPLY CUREENT (mA) IDD, 240kbps 20 SUPPLY CUREENT (mA) SUPPLY CURRENT vs. LOAD CAPACITANCE MAX3186-TOC01 25 TRANSMITTER OUTPUT VOLTAGE (V) MAX3186 ±15kV ESD-Protected, EMC-Compliant, 230kbps RS-232 Serial Port for Modems 5000 FALL, 2000pF 0 0 2 4 6 8 10 12 14 16 LOAD CURRENT PER TRANSMITTER (pF) 18 -55 -35 -15 5 25 45 65 85 105 125 TEMPERATURE (°C) _______________________________________________________________________________________ ±15kV ESD-Protected, EMC-Compliant, 230kbps RS-232 Serial Port for Modems PIN NAME 1 VDD 2, 4, 7, 8, 9 T1OUT–T5OUT 3, 5, 6 R1IN, R2IN, R3IN FUNCTION Supply-Voltage Input, +10.8V to +13.2V Transmitter Outputs, swing between VDD and VSS Receiver Inputs 10 VSS Supply-Voltage Input, -10.8V to -13.2V 11 GND Ground. Connect to system ground. 12, 13, 14, 17, 19 T5IN–T1IN 15, 16, 18 R3OUT, R2OUT, R1OUT 20 VCC Transmitter Inputs Receiver Outputs, swing between GND and VCC Supply-Voltage Input, +4.5V to +5.5V _______________Detailed Description ±15kV ESD Protection RC 50M to 100M CHARGE-CURRENT LIMIT RESISTOR HIGHVOLTAGE DC SOURCE Cs 150pF RD 330Ω As with all Maxim devices, ESD-protection structures are incorporated on all pins to protect against electrostatic discharges encountered during handling and assembly. The MAX3186 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 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 characterized 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 IEC801-2) 3) ±15kV using the Air-Gap Method specified in IEC1000-4-2 (formerly IEC801-2) DISCHARGE RESISTANCE STORAGE CAPACITOR DEVICE UNDER TEST Figure 1a. IEC1000-4-2 ESD Test Model I 100% 90% ESD Test Conditions I PEAK ESD performance depends on a number of conditions. Contact Maxim for a reliability report that documents test setup, methodology, and results. 10% t r = 0.7ns to 1ns t 30ns 60ns Figure 1b. IEC1000-4-2 ESD Generator Current Waveform _______________________________________________________________________________________ 5 MAX3186 ______________________________________________________________Pin Description MAX3186 ±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 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 1.5kΩ resistor. IEC1000-4-2 The IEC1000-4-2 standard covers ESD testing and performance 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 IEC1000-4-2, without additional ESD-protection components. The main difference between tests done using the Human Body Model and IEC1000-4-2 is higher peak current in IEC1000-4-2. Because series resistance is lower in the IEC1000-4-2 ESD test model (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 IEC1000-4-2 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. RC 1M CHARGE-CURRENT LIMIT RESISTOR 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 IEC1000-4-2. __________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-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 0.1µF 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. RD 1500Ω 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 6 tRL TIME tDL CURRENT WAVEFORM Figure 2b. Human Body Model Current Waveform _______________________________________________________________________________________ ±15kV ESD-Protected, EMC-Compliant, 230kbps RS-232 Serial Port for Modems 3.0V DRIVER INPUT 0V V DD 1.5V TPHL V CC TPLH VOH 3.3V 3.0V T1IN T1OUT R1OUT R1IN VOUT 0V -3.0V -3.3V tF2 tR2 tF1 tR1 T2IN T2OUT R2IN R2OUT R3IN 0.181" R3OUT (4.597mm) VOL SIGNAL GENERATOR RL Figure 3. Slew-Rate Test Circuit and Timing Diagram CL T3OUT T3IN T4OUT T4IN T5OUT T5IN V SS GND 0.094" (2.388mm) TRANSISTOR COUNT: 195 SUBSTRATE CONNECTED TO GND _______________________________________________________________________________________ 7 MAX3186 ___________________Chip Topography MAX3186 ±15kV ESD-Protected, EMC-Compliant, 230kbps RS-232 Serial Port for Modems ________________________________________________________Package Information DIM D 0°- 8° A e B 0.101mm 0.004in. A1 C L A A1 B C E e H L INCHES MAX MIN 0.104 0.093 0.012 0.004 0.019 0.014 0.013 0.009 0.299 0.291 0.050 0.419 0.394 0.050 0.016 DIM PINS E Wide SO SMALL-OUTLINE PACKAGE (0.300 in.) H D D D D D 16 18 20 24 28 INCHES MIN MAX 0.398 0.413 0.447 0.463 0.496 0.512 0.598 0.614 0.697 0.713 MILLIMETERS MIN MAX 2.35 2.65 0.10 0.30 0.35 0.49 0.23 0.32 7.40 7.60 1.27 10.00 10.65 0.40 1.27 MILLIMETERS MIN MAX 10.10 10.50 11.35 11.75 12.60 13.00 15.20 15.60 17.70 18.10 21-0042A DIM α E H C L A A1 B C D E e H L α INCHES MILLIMETERS MAX MIN MIN MAX 0.078 1.73 0.068 1.99 0.008 0.05 0.002 0.21 0.015 0.25 0.010 0.38 0.008 0.09 0.004 0.20 SEE VARIATIONS 0.209 5.20 0.205 5.38 0.0256 BSC 0.65 BSC 0.311 7.65 0.301 7.90 0.037 0.63 0.025 0.95 8˚ 0˚ 0˚ 8˚ DIM PINS e SSOP SHRINK SMALL-OUTLINE PACKAGE A B A1 D D D D D 14 16 20 24 28 INCHES MILLIMETERS MAX MIN MAX MIN 6.33 0.239 0.249 6.07 6.33 0.239 0.249 6.07 7.33 0.278 0.289 7.07 8.33 0.317 0.328 8.07 0.397 0.407 10.07 10.33 21-0056A D 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 © 1996 Maxim Integrated Products Printed USA is a registered trademark of Maxim Integrated Products.