MAX1488ECPD

Design Resources Tools and Models Support Click here to ask an associate for production status of specific part numbers. MAX1488E ±15kV ESD-Protected, Quad, Low-Power RS-232 Line Driver General Description The MAX1488E quad, low-power line driver is designed for EIA/TIA-232, EIA/TIA-562, and CCITT V.28 communications in harsh environments. Each transmitter output is protected against ±15kV electrostatic discharge (ESD) shocks. The inputs are TTL and CMOS compatible with minimal loading. The outputs feature internally controlled slew-rate limiting and current limiting. This device has a guaranteed 120kbps data rate. Power-supply current is less than 180μA over a ±4.5V to ±13.2V supply voltage range. The MAX1488E is pin compatible with the MC1488, MC14C88, SN75188, SN75C188, DS1488, and DS14C88. It is available in 14-pin plastic DIP and SO packages. ● ESD Protection: • ±15kV—Human Body Model • ±6kV—IEC801-2, Contact Discharge • ±15kV—IEC801-2, Air-Gap Discharge ● Latchup Free, Even During an ESD Event ● Low 85μA Supply Current from IEE or ICC ● Guaranteed 120kbps Data Rate ● No External Capacitors Required for Slew-Rate Limiting ● Pin Compatible with MC1488, MC14C88, SN75188, SN75C188, DS1488, and DS14C88 Ordering Information Applications ● ● ● ● Features PC Motherboards Modems Interface Data Terminal Equipment (DTE) with Data Circuit-Terminating Equipment (DCE) Equipment Meeting IEC1000-4-2 (formerly IEC801-2) or ±15kV ESD Protection PART TEMP. RANGE PIN-PACKAGE MAX1488ECPD 0°C to +70°C 14 Plastic DIP MAX1488ECSD 0°C to +70°C 14 SO MAX1488EC/D 0°C to +70°C Dice* MAX1488EEPD -40°C to +85°C 14 Plastic DIP MAX1488EESD -40°C to +85°C 14 SO *Dice are specified at TA = +25°C. Typical Operating Circuit 1⁄ MAX1488E 4 Pin Configuration 1⁄ MAX1489E 4 TOP VIEW VEE 1 TTL/CMOS LOGIC 1⁄ MAX1489E 4 PC MOTHERBOARD (DTE) TTL/CMOS LOGIC INTERCONNECTING CABLE SIGNAL GROUND 1⁄ MAX1488E 4 MODEM (DCE) + MAX1488E 14 VCC INPUT A 2 13 INPUT D1 OUTPUT A 3 12 INPUT D2 INPUT B1 4 11 OUTPUT D INPUT B2 5 10 INPUT C1 OUTPUT B 6 9 INPUT C2 GND 7 8 OUTPUT C DIP/SO 19-2403; Rev 1; 1/21 ©  2021 Analog Devices, Inc. All rights reserved. Trademarks and registered trademarks are the property of their respective owners. One Analog Way, Wilmington, MA 01887 U.S.A. | Tel: 781.329.4700 | © 2021 Analog Devices, Inc. All rights reserved. MAX1488E ±15kV ESD-Protected, Quad, Low-Power RS-232 Line Driver Absolute Maximum Ratings Positive Supply Voltage (VCC).............................................+14V Negative Supply Voltage (VEE)............................................ -14V Input Voltage (VIN).................................................-0.3V to +15V Driver Output Voltage...........................................................±15V Continuous Power Dissipation (TA = +70°C) Plastic DIP (derate 10.00mW/°C above +70°C)...........800mW SO (derate 8.7mW/°C above +70°C)...........................695mW Operating Temperature Ranges MAX1488EC_D...................................................0°C to +70°C MAX1488EE_D............................................... -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 13.2V, VEE = -4.5V to -13.2V, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25°C.) PARAMETER SYMBOL CONDITIONS MIN TYP VCC = -VEE = 5.0V, RL = 3kΩ 3.7 4.0 VCC = -VEE = 6.5V, RL = 3kΩ 5 5.4 VCC = -VEE = 12.0V, RL = 3kΩ 10 10.5 MAX UNITS DC CHARACTERISTICS Output Voltage High VOH VCC = -VEE = 13.2V, RL = open Output Voltage Low VOL 13.2 VCC = -VEE = 5.0V, RL = 3kΩ -4.5 -3.7 VCC = -VEE = 6.5V, RL = 3kΩ -5.8 -5 VCC = -VEE = 12.0V, RL = 3kΩ -10.8 -10 VCC = -VEE = 13.2V, RL = open Operating Voltage Range V -13.2 VCC 4.5 13.2 VEE -13.2 -4.5 Positive Supply Current ICC No load Negative Supply Current IEE No load Output Short-Circuit Current IOS Output shorted to ground (Note 1) Input High Voltage VIH Input Low Voltage VIL Input Current IIN1 Output Resistance RO V 85 -180 -85 ±4 ±20 180 V µA µA ±45 2.0 mA V 0 0.8 V ±2 µA VCC = VEE = 0V │VO│ ≤ 2.0V 300 Ω VCC = 4.5V, VEE = -4.5V, CL = 50pF 2.4 3.5 VCC = 9.0V, VEE = -9.0V, CL = 50pF 2.8 3.9 VCC = 12.0V, VEE = -12.0V, CL = 50pF 3.1 4.2 VCC = 4.5V, VEE = -4.5V, CL = 50pF 2.1 4.5 VCC = 9.0V, VEE = -9.0V, CL = 50pF 2.4 5.1 VCC = 12.0V, VEE = -12.0V, CL = 50pF 2.6 5.4 VCC = 4.5V, VEE = -4.5V, CL = 50pF 0.25 VCC = 9.0V, VEE = -9.0V, CL = 50pF 0.42 VCC = 12.0V, VEE = -12.0V, CL = 50pF 0.42 TIMING CHARACTERISTICS (see Figure 1) Output Propagation Delay, Low to High Output Propagation Delay, High to Low Propagation Delay Skew, │tPLH - tPHL│ www.analog.com tPLH tPHL tSK μs μs μs Analog Devices │  2 MAX1488E ±15kV ESD-Protected, Quad, Low-Power RS-232 Line Driver Electrical Characteristics (continued) (VCC = 4.5V to 13.2V, VEE = -4.5V 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 ±15 IEC-1000-4-2 (Contact Discharge) ±6 IEC-1000-4-2 (Air-Gap Discharge) ±15 tR1 CL = 1500pF, RL = 5kΩ, VOUTPUT_ from -3.3V to 3.3V 850 tR2 CL = 1500pF, RL = 5kΩ, VOUTPUT_ from -3.0V to 3.3V 740 tF1 CL = 1500pF, RL = 5kΩ, VOUTPUT_ from -3.3V to 3.3V 860 tF2 CL = 1500pF, RL = 5kΩ, VOUTPUT_ from -3.0V to 3.3V 765 SR CL = 15pF to 2500pF, RL = 3kΩ to 7kΩ, VCC = 12V, VEE = -12V, TA = +25°C, VOUTPUT_ from -3.0V to 3.0V 4 CL = 15pF to 2500pF, RL = 3kΩ to 7kΩ, VCC = 12V, VEE = -12V, TA = +25°C 120 ESD Protection Output Rise Time Output Fall Time Output Slew Rate Guaranteed Data Rate kV ns ns 30 V/μs kbps Note 1: The IOS value is for one output at a time. If more than one output is shorted simultaneously, damage may occur. Typical Operating Characteristics (VCC = 12V, VEE = -12V, TA = +25°C, unless otherwise noted.) RL = 3kΩ VOH 5 0 -5 VOL RL = 3kΩ -10 -15 RL = 5kΩ 4 5 6 7 8 9 10 11 12 13 14 VCC AND -VEE SUPPLIES (V) www.analog.com 9 RISING EDGE 8 7 FALLING EDGE 6 5 VOH @ VCC = -V EE = 12V 10 VOH @ VCC = -V EE = 4.5V 5 0 VOL @ VCC = -V EE = 4.5V -5 VOL @ VCC = -V EE = 12V -10 4 3 15 0 500 1000 1500 2000 2500 LOAD CAPACITANCE (pF) 3000 MAX1488E TOC-3 RL = 3kΩ 10 SLEW RATE (V/µs) OUTPUT VOLTAGE (V) 10 11 OUTPUT VOLTAGE (V) RL = 5kΩ MAX1488E TOC-1 15 OUTPUT VOLTAGE vs. TEMPERATURE SLEW RATE vs. LOAD CAPACITANCE MAX1488E TOC-2 OUTPUT VOLTAGE vs. SUPPLY VOLTAGE -15 RL = 3kΩ -40 -20 0 20 40 60 80 100 TEMPERATURE (°C) Analog Devices │  3 MAX1488E ±15kV ESD-Protected, Quad, Low-Power RS-232 Line Driver Pin Description PIN NAME 1 VEE 2, 4, 5, 9, 10, 12, 13 INPUT_ 3, 6, 8, 11 FUNCTION -4.5V to -13.2V Supply Voltage Input DRIVER INPUT 0V 3.0V 1.5V TPHL TPLH VOH Driver Inputs OUTPUT_ Driver Outputs 7 GND Ground 14 VCC +4.5V to +13.2V Supply Voltage Input 3.3V 3.0V VOUT -3.0V -3.3V Detailed Description The MAX1488E provides ±15kV of ESD protection when operating or when powered down. After an ESD event, the MAX1488E will not latch up. Internal slew-rate-limiting circuitry eliminates the need for external capacitors. The MAX1488E has a guaranteed 120kbps data rate. Outputs Tables 1 and 2 describe the output states. The output voltage level is affected by both the load current and supply voltage, and is stable over temperature. Refer to the Typical Operating Characteristics to see how the output voltage varies with supply voltage, load capacitance, and temperature. Table 1. Driver A Functions INPUT A OUTPUTA H L L H 0V tF2 tR2 tF1 tR1 SIGNAL GENERATOR VOL RL CL Figure 1. Slew-Rate Test Circuit and Timing Diagram tion 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 MAX1488E keeps working without latchup. ESD protection can be tested in various ways; the transmitter outputs are characterized for protection to the following: Table 2. Driver B–D Functions 1) ±15kV using the Human Body Model 2) ±6kV using the Contact-Discharge Method specified in IEC1000-4-2 (formerly IEC801-2) INPUT_1 INPUT_2 OUTPUT_ H H L L X H 3) ±15kV using the Air-Gap Method specified in IEC1000-4-2 (formerly IEC801-2). X L H ESD Test Conditions Inputs The driver inputs determine the driver output states (Tables 1 and 2). Driver inputs B, C, and D have two inputs. Connect unused inputs to ground or VCC. ±15kV 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 MAX1488E driver outputs have extra protec- www.analog.com ESD performance depends on a number of conditions. Contact Maxim for a reliability report that documents test setup, methodology, and results. 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 test device through a 1.5kΩ resistor. Analog Devices │  4 MAX1488E ±15kV ESD-Protected, Quad, Low-Power RS-232 Line Driver RC 1M CHARGE-CURRENT LIMIT RESISTOR HIGHVOLTAGE DC SOURCE Cs 100pF RC 50M to 100M RC 1500Ω DISCHARGE RESISTANCE CHARGE-CURRENT LIMIT RESISTOR DEVICE UNDER TEST STORAGE CAPACITOR Figure 2a. Human Body ESD Test Model IP 100% 90% Cs 150pF DISCHARGE RESISTANCE STORAGE CAPACITOR DEVICE UNDER TEST Figure 3a. IEC1000-4-2 ESD Test Model I 100% 90% PEAK-TO-PEAK RINGING (NOT DRAWN TO SCALE) I PEAK Ir HIGHVOLTAGE DC SOURCE RC 330Ω AMPERES 36.8% 10% 0 10% 0 tRL TIME tDL CURRENT WAVEFORM t r = 0.7ns to 1ns 30ns t 60ns Figure 2b. Human Body Model Current Waveform Figure 3b. IEC1000-4-2 ESD Generator Current Waveform IEC1000-4-2 Machine Model The IEC1000-4-2 standard covers ESD testing and performance of finished equipment; it does not specifically refer to integrated circuits. The MAX1488E helps you design equipment that meets Level 4 (the highest level) of IEC1000-4-2, without additional ESD-protection components. The Machine Model for ESD testing uses a 200pF storage capacitor and zero-discharge resistance. Its objective is to mimic the stress caused by contact that occurs with handling and assembly during manufacturing. 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 the Human Body Model and IEC1000-4-2. The major 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 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 ±6kV IEC1000-4-2 Level 4 ESD Contact-Discharge test. The Air-Gap test involves approaching the device with a charged probe. The Contact-Discharge method connects the probe to the device before the probe is energized. www.analog.com 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 it is important to minimize the ground-lead return path to the power supply. A separate return path to the power supply is recommended. Trace widths should be greater than 40 mils. VCC and VEE must be bypassed with 0.1μF capacitors as close to the part as possible to ensure maximum ESD protection. Analog Devices │  5 MAX1488E ±15kV ESD-Protected, Quad, Low-Power RS-232 Line Driver Chip Topography VSS VDD INPUT D1 INPUT A INPUT D2 0.134" (3.40mm) OUTPUT A OUTPUT D INPUT B1 INPUT C1 INPUT B2 INPUT C2 OUTPUT B OUTPUT C GND 0.070" (1.78mm) TRANSISTOR COUNT: 95 SUBSTRATE CONNECTED TO GND www.analog.com Analog Devices │  6 MAX1488E ±15kV ESD-Protected, Quad, Low-Power RS-232 Line Driver Package Information For the latest package outline information and land patterns (footprints), go to www.maximintegrated.com/packages. Note that a “+”, “#”, or “-” in the package code indicates RoHS status only. Package drawings may show a different suffix character, but the drawing pertains to the package regardless of RoHS status. www.analog.com Analog Devices │  7 MAX1488E ±15kV ESD-Protected, Quad, Low-Power RS-232 Line Driver Package Information (continued) For the latest package outline information and land patterns (footprints), go to www.maximintegrated.com/packages. Note that a “+”, “#”, or “-” in the package code indicates RoHS status only. Package drawings may show a different suffix character, but the drawing pertains to the package regardless of RoHS status. www.analog.com Analog Devices │  8 MAX1488E ±15kV ESD-Protected, Quad, Low-Power RS-232 Line Driver Revision History REVISION NUMBER REVISION DATE 0 8/96 Initial release — 1 1/21 Updated Package Information 8 DESCRIPTION PAGES CHANGED Information furnished by Analog Devices is believed to be accurate and reliable. However, no responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other rights of third parties that may result from its use.Specifications subject to change without notice. No license is granted by implicationor otherwise under any patent or patent rights of Analog Devices. Trademarks andregistered trademarks are the property of their respective owners. w w w . a n a l o g . c o m Analog Devices │  9