REC3-243.3SR中文资料

L324A资料(26 V for LM2902)? Dual Supplies ...+1.5 V to +16 V (+13 V for LM2902)DLow Supply-Current Drain Independent of Supply Voltage ...0.8 mA Typ DCommon-Mode Input Voltage Range Includes Ground, Allowing Direct Sensing Near Ground DLow Input Bias and Offset Parameters ? Input Offset Voltage ...3mV Typ A Versions ...2mV Typ ? Input Offset Current ...2 nA Typ ? Input Bias Current ...20 nA Typ A Versions ...15 nA Typ DDifferential Input Voltage Range Equal to Maximum-Rated Supply Voltage ...32V (26 V for LM2902)DOpen-Loop Differential Voltage Amplification ...100 V/mV Typ D Internal Frequency Compensation description/ordering informationThese devices consist of four independenthigh-gain frequency-compensated operationalamplifiers that are designed specifically to operatefrom a single supply over a wide range of voltages.Operation from split supplies also is possible if thedifference between the two supplies is 3 V to 32 V(3 V to 26 V for the LM2902), and V CC is at least1.5 V more positive than the input common-modevoltage. The low supply-current drain isindependent of the magnitude of the supplyvoltage.Applications include transducer amplifiers, dc amplification blocks, and all the conventionaloperational-amplifier circuits that now can be more easily implemented in single-supply-voltage systems. Forexample, the LM124 can be operated directly from the standard 5-V supply that is used in digital systems and provides the required interface electronics, without requiring additional ±15-V supplies.1234 5671413121110981OUT 1IN?1IN+V CC 2IN+2IN?2OUT 4OUT 4IN?4IN+GND 3IN+3IN?3OUT LM2902K ...D, DB, N, NS, OR PW PACKAGE LM2902KV, LM2902KAV ...D OR PW PACKAGE (TOP VIEW)32120199101112134567818171615144IN+NC GND NC 3IN+1IN+NC V CC NC2IN+LM124, LM124A ...FK PACKAGE (TOP VIEW)1I N ?1O U T N C 3I N ?4I N ?2I N ?2O U T N C NC ? No internal connection 3O U T 4O U TLM124, LM124A, LM224, LM224A, LM324, LM324A, LM2902, LM2902V,LM224K, LM224KA, LM324K, LM324KA, LM2902K, LM2902KV, LM2902KAV QUADRUPLE OPERATIONAL AMPLIFIERS SLOS066T ? SEPTEMBER 1975 ? REVISED MARCH 2010ORDERING INFORMATION{T A V IO maxAT 25°CMAXTESTEDV CCPACKAGE}ORDERABLEPART NUMBERTOP-SIDEMARKING PDIP(N)Tube of25 LM324N LM324NPDIP (N)Tube of 25LM324KN LM324KNTube of 50LM324DReel of 2500LM324DRReel of 2500LM324DRG3LM324SOIC (D)Tube of 50LM324KD7mV30VReel of 2500LM324KDRLM324K7 mV30 VReel of 2000LM324NSR LM324 Tube of 50LM324KNSSOP (NS)Reel of 2000LM324KNSRLM324KTube of 90LM324PWTSSOP(PW)Reel of 2000LM324PWRL324TSSOP (PW)Tube of 90LM324KPWC to70Reel of 2000LM324KPWR L324K0°C to 70°CPDIP(N)Tube of 25LM324AN LM324ANPDIP (N)Tube of 25LM324KAN LM324KANTube of 50LM324ADSOIC(D)Reel of 2500LM324ADRLM324ASOIC (D)Tube of 50LM324KADReel of 2500LM324KADRLM324KA3mV30V Reel of 2000LM324ANSR LM324A3 mV30 VTube of 50LM324KANSSOP (NS)Reel of 2000LM324KANSRLM324KA SSOP (DB)Reel of 2000LM324ADBR LM324A Tube of 90LM324APWTSSOP(PW)Reel of 2000LM324APWRL324ATSSOP (PW)Tube of 90LM324KAPWReel of 2000LM324KAPWRL324KAPDIP(N)Tube of25LM224N LM224NPDIP (N)Tube of 25LM224KN LM224KN5mV30V Tube of 50LM224D5 mV30 VSOIC(D)Reel of 2500LM224DRLM224SOIC (D)Tube of 50LM224KD25C to85Reel of 2500LM224KDRLM224K25°C to 85°CPDIP(N)Tube of 25LM224AN LM224ANPDIP (N)Tube of 25LM224KAN LM224KAN3mV30V Tube of 50LM224AD3 mV30 VSOIC(D)Reel of 2500LM224ADRLM224ASOIC (D)Tube of 50LM224KADReel of 2500LM224KADRLM224KAFor the most current package and ordering information, see the Package Option Addendum at the end of this document, or see the TI web site at .Package drawings, thermal data, and symbolization are available at /packaging.LM124, LM124A, LM224, LM224A, LM324, LM324A, LM2902, LM2902V,LM224K, LM224KA, LM324K, LM324KA, LM2902K, LM2902KV, LM2902KAV QUADRUPLE OPERATIONAL AMPLIFIERS SLOS066T ? SEPTEMBER 1975 ? REVISED MARCH 2010ORDERING INFORMATION (CONTINUED)T A V IO max AT 25°C MAX TESTEDV CCPACKAGE ?ORDERABLE PART NUMBER TOP-SIDE MARKING PDIP (N)Tube of 25LM2902N LM2902N PDIP (N)Tube of 25LM2902KN LM2902KN Tube of 50LM2902D SOIC (D)Reel of 2500LM2902DR LM2902SOIC (D)Tube of 50LM2902KD Reel of 2500LM2902KDR LM2902K Reel of 2000LM2902NSR LM2902Tube of 50LM2902KNS 7 mV26 VSOP (NS)Reel of 2000LM2902KNSR LM2902K ?40°C to 125°C SSOP (DB)Tube of 80LM2902KDB 40SSOP (DB)Reel of 2000LM2902KDBR L2902K Tube of 90LM2902PW TSSOP (PW)Reel of 2000LM2902PWR L2902TSSOP (PW)Tube of 90LM2902KPW Reel of 2000LM2902KPWR L2902K 32V SOIC (D)Reel of 2500LM2902KVQDR L2902KV 32 VTSSOP (PW)Reel of 2000LM2902KVQPWR L2902KV 2mV 32V SOIC (D)Reel of 2500LM2902KAVQDR L2902KA 2 mV 32 V TSSOP (PW) Reel of 2000LM2902KAVQPWR L2902KA CDIP (J)Tube of 25LM124J LM124J CFP (W)Tube of 25LM124W LM124W LCCC (FK)Tube of 55LM124FK LM124FK 55C to 125 5 mV30 V SOIC (D)Tube of 50LM124D ?55°C to 125°C SOIC (D)Reel of 2500LM124DR LM124CDIP (J)Tube of 25LM124AJ LM124AJ 2 mV30 V CFP (W)Tube of 25 LM124AW LM124AW LCCC (FK)Tube of 55LM124AFK LM124AFK ?Package drawings, standard packing quantities, thermal data, symbolization, and PCB designguidelines are available at/sc/package.symbol (each amplifier)+IN?IN+OUTLM124, LM124A, LM224, LM224A, LM324, LM324A, LM2902, LM2902V,LM224K, LM224KA, LM324K, LM324KA, LM2902K, LM2902KV, LM2902KAV QUADRUPLE OPERATIONAL AMPLIFIERS SLOS066T ? SEPTEMBER 1975 ? REVISED MARCH 2010schematic (each amplifier)V CCOUTGND IN?IN+COMPONENT COUNT(total device)Epi-FETTransistorsDiodesResistorsCapacitors1954114ESD protection cells - available on LM324K and LM324KA onlyLM124, LM124A, LM224, LM224A, LM324, LM324A, LM2902, LM2902V, LM224K, LM224KA, LM324K, LM324KA, LM2902K, LM2902KV, LM2902KAVQUADRUPLE OPERATIONAL AMPLIFIERSSLOS066T ? SEPTEMBER 1975 ? REVISED MARCH 2010 absolute maximum ratings over operating free-air temperature range (unless otherwise noted)?LM2902ALL OTHER DEVICESUNITSupply voltage, V CC (see Note 1)±13 or 26±16 or 32V Differential input voltage, V ID (see Note 2)±26±32V Input voltage, V I (either input)?0.3 to 26?0.3 to 32V Duration of output short circuit (one amplifier) to ground at (or below) T A=25°C, V CC≤ 15 V (see Note 3)Unlimited UnlimitedD package8686DB package9696θN package8080°C/W Package thermal impedance, JA(see Notes 4 and 5)NS package7676PW package113113FK package 5.61q J package15.05°C/W Package thermal impedance, JC (see Notes 6 and 7)W package14.65Operating virtual junction temperature, T J150150°C Case temperature for 60 seconds FK pa ckage260°C Lead temperature 1,6 mm (1/16 inch) from case for 60 seconds J or W package300300°C Storage temperature range, T stg?65 to 150?65 to 150°CStresses beyond those listed under “absolute maximum ratings” may cause permanent damage to the device. Th ese are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated under “recommended operating conditions” is not implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.NOTES: 1.All voltage values (except differential voltages and V CC specified for the measurement of I OS) are with respect to the network GND.2.Differential voltages are at IN+, with respect to IN?.3.Short circuits from outputs to V CC can cause excessive heating and eventual destruction.4.Maximum power dissipation is a function of T J(max), q JA, and T A. The maximum allowable power dissipation at any allowableambient temperature is P D = (T J(max) ? T A)/q JA. Operatingat the a bsolute maximum T J of 150°C can affect reliability.5.The package thermal impedance is calculated in accordance with JESD 51-7.6.Maximum power dissipation is a function of T J(max), q JC, and T C. The maximum allowable power dissipation at any allowable casetemperature is P D = (T J(max) ? T C)/q JC. Operating at the absolute maximum T J of 150°C can affect reliability.7.The package thermal impedance is calculated in accordance with MIL-STD-883.ESD protectionTEST CONDITIONS TYP UNIT Human-Body Model LM224K, LM224KA, LM324K, LM324KA, LM2902K, LM2902KV, LM2902KAV±2kVLM124, LM124A, LM224, LM224A, LM324, LM324A, LM2902, LM2902V,LM224K, LM224KA, LM324K, LM324KA, LM2902K, LM2902KV, LM2902KAV QUADRUPLE OPERATIONAL AMPLIFIERS SLOS066T ? SEPTEMBER 1975 ? REVISED MARCH 2010electrical characteristics at specified free-air temperature, V CC= 5 V (unless otherwise noted)LM124LM224LM324LM324KPARAMETER TEST CONDITIONS?T AMIN TYP§MAX MIN TYP§MAXUNITInput offset voltage 25°C3537V IO Input offset voltage V CC = 5 V to MAX,V IC= V ICR min,V O = 1.4 V Full range79 mVInput offset current14V 25°C230250I IO Input offset current V O = 1.4 VFull range100150nAInput bias current V14V 25°C?20?150?20?250 I IB Input bias current O = 1.4 VFull range?300?500nA5V to MAX 25°C0 toV CC? 1.50 toV CC ? 1.5V ICR Common-modeinput voltage rangeV CC = 5 V to MAXFull range0 to0 toVFull rangeV CC ? 2V CC? 2R L= 2 k?25°C V CC ? 1.5V CC ? 1.5High-level R L = 10 k?25°CV OHoutput voltageMAX R L= 2 k?Full range2626Vp gV CC = MAXR L≥ 10 k?Full range27282728V OL Low-leveloutput voltageR L≤ 10 k?Full range520520mV Large-signaldifferential voltageV25°C5010025100A VD differential voltage amplificationCC = 15 V, V O = 1 V to 11 V,R L≥ 2 k?Full range2515V/mVCMRR Common-mode rejection ratioV IC = V ICR min25°C70806580dB Supply-voltagerejection ratiok SVR rejection ratio(?V CC/?V IO)25°C6510065100dBV O1/V O2Crosstalk attenuationf = 1 kHz to 20 kHz25°C120120dB V = 15 V,1V25°C?20?30?60?20?30?60 CCV ID = 1 V,V O = 0SourceFull range?10?10I Output current V = 15 V,1V 25°C10201020mAO p CCV ID = ?1 V,V O = 15 V SinkFull range55V ID= ?1 V,V O= 200 mV25°C12301230μAI OS Short-circuitoutput currentV CC at 5 V,GND at ?5 VV O = 0,25°C±40±60±40±60mA Supply currentV O = 2.5 V,No load Full range0.7 1.20.7 1.2I CC Supply current(four amplifiers)V CC = MAX,V O = 0.5 V CC,No load Full range 1.43 1.43mAAll characteristics are measured under open-loop conditions, with zero common-mode input voltage, unless otherwise specified. MAX V CC for testing purposes is 26 V for LM2902 and 30 V for the others.Full range is ?55°C to 125°C for LM124, ?25°C to 85°C for LM224, and 0°C to 70°C for LM324.§All typical values are at T A = 25°C.LM124, LM124A, LM224, LM224A, LM324, LM324A, LM2902, LM2902V,LM224K, LM224KA, LM324K, LM324KA, LM2902K,LM2902KV, LM2902KAV QUADRUPLE OPERATIONAL AMPLIFIERS SLOS066T ? SEPTEMBER 1975 ? REVISED MARCH 2010electrical characteristics at specified free-air temperature, V CC = 5 V (unless otherwise noted)TEST CONDITIONS ?LM2902LM2902V PARAMETER TEST CONDITIONST A MIN TYP §MAX MIN TYP §MAX UNIT V 5V tNon-A-suffix 25°C 3737Input offset voltage CC = 5 V to MAX, devices Full range 1010V IO Input offset voltage V = V min, 14V 25°C 12mV IC I CR V O = 1.4 VA-suffix devices Full range 4?V IO /?T Input offset voltage temperature drift R S = 0 ?Full range 7μV/°C Input offset current 14V 25°C250250I IO Input offset current V O = 1.4 V Full range300150nA ?I IO /?T Input offset current temperature drift Full range10pA/°C Input bias current V 14V 25°C20?250?20?250I IB Input bias current O = 1.4 V Full range500?500nA 5V to MAX25°C0 to V CC ? 1.50 to V CC ? 1.5V ICR Common-mode input voltage range V CC = 5 V to MAX Full range 0 to 0 to V Full range V CC ? 2V CC ? 2R L = 2 k ?25°C High-level R L = 10 k ?25°C V CC ? 1.5V CC ? 1.5V OH output voltage MAX R L = 2 k ?Full range 2226V p g V CC = MAXR L ≥ 10 k ?Full range 232427V OL Low-level output voltage R L ≤ 10 k ?Full range 520520mV Large-signaldifferential voltage V 25°C 2510025100A VD differential voltageamplificationCC = 15 V, V O = 1 V to 11 V,R L ≥ 2 k ?Full range 1515V/mV CMRR Common-moderejection ratioV IC = V ICR min 25°C 50806080dB Supply-voltagerejection ratio k SVR rejection ratio(?V CC /?V IO )25°C 5010060100dB V O1/V O2Crosstalkattenuation f = 1 kHz to 20 kHz25°C 120120dB V = 15 V,1VS 25°C ?20?30?60?20?30?60CC V ID = 1 V,V O = 0Source Full range ?10?10I O Output current V = 15 V,1V 25°C 10201020mA CC V ID = ?1 V,V O = 15 VSink Full range 55V ID = ?1 V,V O = 200 mV 25°C 301240μA I OS Short-circuit output currentV CC at 5 V,GND at ?5 V V O = 0,25°C ±40±60±40±60mA Supply currentV O = 2.5 V,No load Full range 0.7 1.20.7 1.2I CCSupply current (four amplifiers)V CC = MAX,V O = 0.5 V CC ,No load Full range 1.43 1.43mA ?All characteristics are measured under open-loop conditions, with zero common-mode input voltage, unless otherwise specified. MAX V CC fortesting purposes is 26 V for LM2902 and 32 V for LM2902V.Full range is ?40°C to 125°C for LM2902.§All typical values are at T A= 25°C.8POST OFFICE BOX 655303 DALLAS, TEXAS 75265?LM124, LM124A, LM224, LM224A, LM324, LM324A, LM2902, LM2902V,LM224K, LM224KA, LM324K, LM324KA, LM2902K, LM2902KV, LM2902KAV QUADRUPLE OPERATIONAL AMPLIFIERS SLOS066T ? SEPTEMBER 1975 ? REVISED MARCH 2010operating conditions, V CC = ±15 V, T A = 25°C PARAMETERTEST CONDITIONS TYP UNIT SRSlew rate at unity gain R L = 1 M ?, C L = 30 pF , V I = ±10 V (see Figure 1)0.5V/μs B 1Unity-gain bandwidth R L = 1 M ?, C L = 20 pF (see Figure 1) 1.2MHz V n Equivalent input noise voltage R S = 100 ?, V I= 0 V, f = 1 kHz (see Figure 2)35nV/√HzFigure 1. Unity-Gain AmplifierFigure 2. Noise-Test CircuitPACKAGE PACKAGING INFORMATIONPACKAGE PACKAGE PACKAGE PACKAGE PACKAGE PACKAGE PACKAGE PACKAGE PACKAGE 。

For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,or visit Maxim's website at .General DescriptionThe MAX3222E/MAX3232E/MAX3237E/MAX3241E/MAX3246E +3.0V-powered EIA/TIA-232 and V.28/V.24communications interface devices feature low power con-sumption, high data-rate capabilities, and enhanced electrostatic-discharge (ESD) protection. The enhanced ESD structure protects all transmitter outputs and receiver inputs to ±15kV using IEC 1000-4-2 Air-G ap Discharge, ±8kV using IEC 1000-4-2 Contact Discharge (±9kV for MAX3246E), and ±15kV using the Human Body Model. The logic and receiver I/O pins of the MAX3237E are protected to the above standards, while the transmit-ter output pins are protected to ±15kV using the Human Body Model.A proprietary low-dropout transmitter output stage delivers true RS-232 performance from a +3.0V to +5.5V power supply, using an internal dual charge pump. The charge pump requires only four small 0.1µF capacitors for opera-tion from a +3.3V supply. Each device guarantees opera-tion at data rates of 250kbps while maintaining RS-232output levels. The MAX3237E guarantees operation at 250kbps in the normal operating mode and 1Mbps in the MegaBaud™ operating mode, while maintaining RS-232-compliant output levels.The MAX3222E/MAX3232E have two receivers and two transmitters. The MAX3222E features a 1µA shutdown mode that reduces power consumption in battery-pow-ered portable systems. The MAX3222E receivers remain active in shutdown mode, allowing monitoring of external devices while consuming only 1µA of supply current. The MAX3222E and MAX3232E are pin, package, and func-tionally compatible with the industry-standard MAX242and MAX232, respectively.The MAX3241E/MAX3246E are complete serial ports (three drivers/five receivers) designed for notebook and subnotebook computers. The MAX3237E (five drivers/three receivers) is ideal for peripheral applications that require fast data transfer. These devices feature a shut-down mode in which all receivers remain active, while consuming only 1µA (MAX3241E/MAX3246E) or 10nA (MAX3237E).The MAX3222E, MAX3232E, and MAX3241E are avail-able in space-saving SO, SSOP, TQFN and TSSOP pack-ages. The MAX3237E is offered in an SSOP package.The MAX3246E is offered in the ultra-small 6 x 6 UCSP™package.ApplicationsBattery-Powered Equipment PrintersCell PhonesSmart Phones Cell-Phone Data Cables xDSL ModemsNotebook, Subnotebook,and Palmtop ComputersNext-Generation Device Features♦For Space-Constrained ApplicationsMAX3228E/MAX3229E: ±15kV ESD-Protected, +2.5V to +5.5V, RS-232 Transceivers in UCSP ♦For Low-Voltage or Data Cable ApplicationsMAX3380E/MAX3381E: +2.35V to +5.5V, 1µA, 2Tx/2Rx, RS-232 Transceivers with ±15kV ESD-Protected I/O and Logic PinsMAX3222E/MAX3232E/MAX3237E/MAX3241E †/MAX3246E±15kV ESD-Protected, Down to 10nA, 3.0V to 5.5V ,Up to 1Mbps, True RS-232 Transceivers________________________________________________________________Maxim Integrated Products 119-1298; Rev 11; 10/07Ordering Information continued at end of data sheet.*Dice are tested at T A = +25°C, DC parameters only.**EP = Exposed paddle.Pin Configurations, Selector Guide, and Typical Operating Circuits appear at end of data sheet.MegaBaud and UCSP are trademarks of Maxim Integrated Products, Inc.†Covered by U.S. Patent numbers 4,636,930; 4,679,134;4,777,577; 4,797,899; 4,809,152; 4,897,774; 4,999,761; and other patents pending.M A X 3222E /M A X 3232E /M A X 3237E /M A X 3241E †/M A X 3246EUp to 1Mbps, True RS-232 TransceiversABSOLUTE MAXIMUM RATINGSELECTRICAL CHARACTERISTICS(V CC = +3V to +5.5V, C1–C4 = 0.1µF, T A = T MIN to T MAX , unless otherwise noted. Typical values are at T A = +25°C.) (Notes 3, 4)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.V CC to GND..............................................................-0.3V to +6V V+ to GND (Note 1)..................................................-0.3V to +7V V- to GND (Note 1)...................................................+0.3V to -7V V+ + |V-| (Note 1).................................................................+13V Input Voltages T_IN, EN , SHDN , MBAUD to GND ........................-0.3V to +6V R_IN to GND.....................................................................±25V Output Voltages T_OUT to GND...............................................................±13.2V R_OUT, R_OUTB (MAX3241E)................-0.3V to (V CC + 0.3V)Short-Circuit Duration, T_OUT to GND.......................Continuous Continuous Power Dissipation (T A = +70°C)16-Pin SSOP (derate 7.14mW/°C above +70°C)..........571mW 16-Pin TSSOP (derate 9.4mW/°C above +70°C).......754.7mW 16-Pin TQFN (derate 20.8mW/°C above +70°C).....1666.7mW 16-Pin Wide SO (derate 9.52mW/°C above +70°C).....762mW 18-Pin Wide SO (derate 9.52mW/°C above +70°C).....762mW 18-Pin PDIP (derate 11.11mW/°C above +70°C)..........889mW 20-Pin TQFN (derate 21.3mW/°C above +70°C)........1702mW 20-Pin TSSOP (derate 10.9mW/°C above +70°C)........879mW 20-Pin SSOP (derate 8.00mW/°C above +70°C)..........640mW 28-Pin SSOP (derate 9.52mW/°C above +70°C)..........762mW 28-Pin Wide SO (derate 12.50mW/°C above +70°C).............1W 28-Pin TSSOP (derate 12.8mW/°C above +70°C)......1026mW 32-Lead Thin QFN (derate 33.3mW/°C above +70°C)..2666mW 6 x 6 UCSP (derate 12.6mW/°C above +70°C).............1010mW Operating Temperature Ranges MAX32_ _EC_ _...................................................0°C to +70°C MAX32_ _EE_ _.................................................-40°C to +85°C Storage Temperature Range.............................-65°C to +150°C Lead Temperature (soldering, 10s).................................+300°C Bump Reflow Temperature (Note 2)Infrared, 15s..................................................................+200°C Vapor Phase, 20s..........................................................+215°C Note 1:V+ and V- can have maximum magnitudes of 7V, but their absolute difference cannot exceed 13V.Note 2:This device is constructed using a unique set of packaging techniques that impose a limit on the thermal profile the devicecan be exposed to during board-level solder attach and rework. This limit permits only the use of the solder profiles recom-mended in the industry-standard specification, JEDEC 020A, paragraph 7.6, Table 3 for IR/VPR and convection reflow.Preheating is required. Hand or wave soldering is not allowed.MAX3222E/MAX3232E/MAX3237E/MAX3241E †/MAX3246EUp to 1Mbps, True RS-232 Transceivers_______________________________________________________________________________________3M A X 3222E /M A X 3232E /M A X 3237E /M A X 3241E †/M A X 3246EUp to 1Mbps, True RS-232 Transceivers4_______________________________________________________________________________________TIMING CHARACTERISTICS—MAX3237E(V CC = +3V to +5.5V, C1–C4 = 0.1µF, T A = T MIN to T MAX , unless otherwise noted. Typical values are at T A = +25°C.) (Note 3)±10%. MAX3237E: C1–C4 = 0.1µF tested at +3.3V ±5%, C1–C4 = 0.22µF tested at +3.3V ±10%; C1 = 0.047µF, C2, C3, C4 =0.33µF tested at +5.0V ±10%. MAX3246E; C1-C4 = 0.22µF tested at +3.3V ±10%; C1 = 0.22µF, C2, C3, C4 = 0.54µF tested at 5.0V ±10%.Note 4:MAX3246E devices are production tested at +25°C. All limits are guaranteed by design over the operating temperature range.Note 5:The MAX3237E logic inputs have an active positive feedback resistor. The input current goes to zero when the inputs are atthe supply rails.Note 6:MAX3241EEUI is specified at T A = +25°C.Note 7:Transmitter skew is measured at the transmitter zero crosspoints.TIMING CHARACTERISTICS—MAX3222E/MAX3232E/MAX3241E/MAX3246EMAX3222E/MAX3232E/MAX3237E/MAX3241E †/MAX3246EUp to 1Mbps, True RS-232 Transceivers_______________________________________________________________________________________5-6-4-202460MAX3237ETRANSMITTER OUTPUT VOLTAGE vs. LOAD CAPACITANCE (MBAUD = GND)LOAD CAPACITANCE (pF)T R A N S M I T T E R O U T P U T V O L T A G E (V )10001500500200025003000531-1-3-5-6-2-42046-5-31-135010001500500200025003000LOAD CAPACITANCE (pF)T R A N S M I T T E R O U T P U T V O L T A G E (V )MAX3237ETRANSMITTER OUTPUT VOLTAGEvs. LOAD CAPACITANCE-7.5-5.0-2.502.55.07.5MAX3237ETRANSMITTER OUTPUT VOLTAGE vs. LOAD CAPACITANCE (MBAUD = V CC )LOAD CAPACITANCE (pF)T R A N S M I T T E R O U T P U T V O L T A G E (V )500100015002000__________________________________________Typical Operating Characteristics(V CC = +3.3V, 250kbps data rate, 0.1µF capacitors, all transmitters loaded with 3k Ωand C L , T A = +25°C, unless otherwise noted.)-6-5-4-3-2-10123456010002000300040005000MAX3241ETRANSMITTER OUTPUT VOLTAGEvs. LOAD CAPACITANCELOAD CAPACITANCE (pF)T R A N S M I T T E R O U T P U T V O L T A G E (V)302010405060020001000300040005000MAX3241EOPERATING SUPPLY CURRENT vs. LOAD CAPACITANCELOAD CAPACITANCE (pF)S U P P L Y C U R R E N T (m A )04286121014010002000300040005000MAX3241ESLEW RATE vs. LOAD CAPACITANCEM A X 3237E t o c 05LOAD CAPACITANCE (pF)S L E W R A T E (V /μs )-6-5-4-3-2-10123456010002000300040005000MAX3222E/MAX3232ETRANSMITTER OUTPUT VOLTAGEvs. LOAD CAPACITANCELOAD CAPACITANCE (pF)T R A N S M I T T E R O U T P UT V O L T A G E (V )624108141216010002000300040005000MAX3222E/MAX3232ESLEW RATE vs. LOAD CAPACITANCELOAD CAPACITANCE (pF)S L E W R A T E (V /μs)2520155103530404520001000300040005000MAX3222E/MAX3232E OPERATING SUPPLY CURRENT vs. LOAD CAPACITANCELOAD CAPACITANCE (pF)S U P P L Y C U R R E N T (m A )M A X 3222E /M A X 3232E /M A X 3237E /M A X 3241E †/M A X 3246EUp to 1Mbps, True RS-232 Transceivers6_______________________________________________________________________________________Typical Operating Characteristics (continued)(V CC = +3.3V, 250kbps data rate, 0.1µF capacitors, all transmitters loaded with 3k Ωand C L , T A = +25°C, unless otherwise noted.)20604080100MAX3237ETRANSMITTER SKEW vs. LOAD CAPACITANCE(MBAUD = V CC )LOAD CAPACITANCE (pF)100015005002000T R A N S M I T T E R S K E W (n s )-6-2-42046-3-51-1352.03.03.52.54.04.55.0SUPPLY VOLTAGE (V)T R A N S M I T T E R O U T P U T V O L T A G E (V )MAX3237ETRANSMITTER OUTPUT VOLTAGE vs. SUPPLY VOLTAGE (MBAUD = GND)10203040502.0MAX3237E SUPPLY CURRENT vs. SUPPLY VOLTAGE (MBAUD = GND)SUPPLY VOLTAGE (V)S U P P L Y C U R R E N T (m A )3.03.52.54.04.55.0MAX3246ETRANSMITTER OUTPUT VOLTAGEvs. LOAD CAPACITANCELOAD CAPACITANCE (pF)T R A N S M I T T E R O U T P U T V O L T A G E (V )4000300010002000-5-4-3-2-101234567-65000468101214160MAX3246ESLEW RATE vs. LOAD CAPACITANCELOAD CAPACITANCE (pF)S L EW R A T E (V /μs )200030001000400050001020304050600MAX3246EOPERATING SUPPLY CURRENT vs. LOAD CAPACITANCEM A X 3237E t o c 17LOAD CAPACITANCE (pF)S U P P L Y C U R R EN T (m A )1000200030004000500055453525155024681012MAX3237ESLEW RATE vs. LOAD CAPACITANCE(MBAUD = GND)LOAD CAPACITANCE (pF)S L E W R A T E (V /μs )10001500500200025003000010203050406070MAX3237ESLEW RATE vs. LOAD CAPACITANCE(MBAUD = V CC )LOAD CAPACITANCE (pF)S L E W R A T E (V /μs )5001000150020001020304050MAX3237ESUPPLY CURRENT vs. LOAD CAPACITANCE WHEN TRANSMITTING DATA (MBAUD = GND)LOAD CAPACITANCE (pF)S U P P L Y C U R R E N T (m A )10001500500200025003000MAX3222E/MAX3232E/MAX3237E/MAX3241E †/MAX3246EUp to 1Mbps, True RS-232 Transceivers_______________________________________________________________________________________7Pin DescriptionM A X 3222E /M A X 3232E /M A X 3237E /M A X 3241E †/M A X 3246EUp to 1Mbps, True RS-232 Transceivers8_______________________________________________________________________________________MAX3222E/MAX3232E/MAX3237E/MAX3241E †/MAX3246EUp to 1Mbps, True RS-232 Transceivers_______________________________________________________________________________________9Detailed DescriptionDual Charge-Pump Voltage ConverterThe MAX3222E/MAX3232E/MAX3237E/MAX3241E/MAX3246Es’ internal power supply consists of a regu-lated dual charge pump that provides output voltages of +5.5V (doubling charge pump) and -5.5V (inverting charge pump) over the +3.0V to +5.5V V CC range. The charge pump operates in discontinuous mode; if the output voltages are less than 5.5V, the charge pump is enabled, and if the output voltages exceed 5.5V, the charge pump is disabled. Each charge pump requires a flying capacitor (C1, C2) and a reservoir capacitor (C3, C4) to generate the V+ and V- supplies (Figure 1).RS-232 TransmittersThe transmitters are inverting level translators that con-vert TTL/CMOS-logic levels to ±5V EIA/TIA-232-compli-ant levels.The MAX3222E/MAX3232E/MAX3237E/MAX3241E/MAX3246E transmitters guarantee a 250kbps data rate with worst-case loads of 3k Ωin parallel with 1000pF,providing compatibility with PC-to-PC communication software (such as LapLink™). Transmitters can be par-alleled to drive multiple receivers or mice.The MAX3222E/MAX3237E/MAX3241E/MAX3246E transmitters are disabled and the outputs are forcedinto a high-impedance state when the device is in shut-down mode (SHDN = G ND). The MAX3222E/MAX3232E/MAX3237E/MAX3241E/MAX3246E permit the outputs to be driven up to ±12V in shutdown.The MAX3222E/MAX3232E/MAX3241E/MAX3246E transmitter inputs do not have pullup resistors. Connect unused inputs to GND or V CC . The MAX3237E’s trans-mitter inputs have a 400k Ωactive positive-feedback resistor, allowing unused inputs to be left unconnected.MAX3237E MegaBaud OperationFor higher-speed serial communications, the MAX3237E features MegaBaud operation. In MegaBaud operating mode (MBAUD = V CC ), the MAX3237E transmitters guarantee a 1Mbps data rate with worst-case loads of 3k Ωin parallel with 250pF for +3.0V < V CC < +4.5V. For +5V ±10% operation, the MAX3237E transmitters guarantee a 1Mbps data rate into worst-case loads of 3k Ωin parallel with 1000pF.RS-232 ReceiversThe receivers convert RS-232 signals to CMOS-logic output levels. The MAX3222E/MAX3237E/MAX3241E/MAX3246E receivers have inverting three-state outputs.Drive EN high to place the receiver(s) into a high-impedance state. Receivers can be either active or inactive in shutdown (Table 1).Figure 1. Slew-Rate Test CircuitsLapLink is a trademark of Traveling Software.M A X 3222E /M A X 3232E /M A X 3237E /M A X 3241E †/M A X 3246EUp to 1Mbps, True RS-232 Transceivers10______________________________________________________________________________________The complementary outputs on the MAX3237E/MAX3241E (R_OUTB) are always active, regardless of the state of EN or SHDN . This allows the device to be used for ring indicator applications without forward biasing other devices connected to the receiver outputs. This is ideal for systems where V CC drops to zero in shutdown to accommodate peripherals such as UARTs (Figure 2).MAX3222E/MAX3237E/MAX3241E/MAX3246E Shutdown ModeSupply current falls to less than 1µA in shutdown mode (SHDN = low). The MAX3237E’s supply current falls to10nA (typ) when all receiver inputs are in the invalid range (-0.3V < R_IN < +0.3). When shut down, the device’s charge pumps are shut off, V+ is pulled down to V CC , V- is pulled to ground, and the transmitter out-puts are disabled (high impedance). The time required to recover from shutdown is typically 100µs, as shown in Figure 3. Connect SHDN to V CC if shutdown mode is not used. SHDN has no effect on R_OUT or R_OUTB (MAX3237E/MAX3241E).±15kV ESD ProtectionAs with all Maxim devices, ESD-protection structures are incorporated to protect against electrostatic dis-charges encountered during handling and assembly.The driver outputs and receiver inputs of the MAX3222E/MAX3232E/MAX3237E/MAX3241E/MAX3246E have extra protection against static electricity. Maxim’s engineers have developed state-of-the-art structures to protect these pins against ESD of ±15kV without damage.The ESD structures withstand high ESD in all states:normal operation, shutdown, and powered down. After an ESD event, Maxim’s E versions keep working without latchup, whereas competing RS-232 products can latch and must be powered down to remove latchup.Furthermore, the MAX3237E logic I/O pins also have ±15kV ESD protection. Protecting the logic I/O pins to ±15kV makes the MAX3237E ideal for data cable applications.SHDN T2OUTT1OUT5V/div2V/divV CC = 3.3V C1–C4 = 0.1μFFigure 3. Transmitter Outputs Recovering from Shutdown or Powering UpMAX3222E/MAX3232E/MAX3237E/MAX3241E †/MAX3246EUp to 1Mbps, True RS-232 TransceiversESD protection can be tested in various ways; the transmitter outputs and receiver inputs for the MAX3222E/MAX3232E/MAX3241E/MAX3246E are characterized for protection to the following limits:•±15kV using the Human Body Model•±8kV using the Contact Discharge method specified in IEC 1000-4-2•±9kV (MAX3246E only) using the Contact Discharge method specified in IEC 1000-4-2•±15kV using the Air-G ap Discharge method speci-fied in IEC 1000-4-2Figure 4a. Human Body ESD Test ModelFigure 4b. Human Body Model Current WaveformFigure 5a. IEC 1000-4-2 ESD Test Model Figure 5b. IEC 1000-4-2 ESD Generator Current WaveformM A X 3222E /M A X 3232E /M A X 3237E /M A X 3241E †/M A X 3246EUp to 1Mbps, True RS-232 Transceiverscharacterized for protection to ±15kV per the Human Body Model.ESD Test ConditionsESD performance depends on a variety of conditions.Contact Maxim for a reliability report that documents test setup, test methodology, and test results.Human Body ModelFigure 4a shows the Human Body Model, and Figure 4b 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 interest,which is then discharged into the test device through a 1.5k Ωresistor.IEC 1000-4-2The IEC 1000-4-2 standard covers ESD testing and performance of finished equipment; it does not specifi-cally refer to integrated circuits. The MAX3222E/MAX3232E/MAX3237E/MAX3241E/MAX3246E help you design equipment that meets level 4 (the highest level)of IEC 1000-4-2, without the need for additional ESD-protection components.The major 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 model. Hence, the ESD with-stand voltage measured to IEC 1000-4-2 is generally lower than that measured using the Human Body Model. Figure 5a shows the IEC 1000-4-2 model, and Figure 5b shows the current waveform for the ±8kV IEC 1000-4-2 level 4 ESD Contact Discharge test. The Air-G ap Discharge test involves approaching the device with a charged probe. The Contact Discharge method connects the probe to the device before the probe is energized.Machine ModelThe Machine Model for ESD tests all pins using a 200pF storage capacitor and zero discharge resis-tance. Its objective is to emulate the stress caused by contact that occurs with handling and assembly during manufacturing. All pins require this protection during manufacturing, not just RS-232 inputs and outputs.Therefore, after PC board assembly, the Machine Model is less relevant to I/O ports.Table 2. Required Minimum Capacitor ValuesFigure 6a. MAX3241E Transmitter Output Voltage vs. Load Current Per TransmitterTable 3. Logic-Family Compatibility with Various Supply VoltagesMAX3222E/MAX3232E/MAX3237E/MAX3241E †/MAX3246EUp to 1Mbps, True RS-232 TransceiversApplications InformationCapacitor SelectionThe capacitor type used for C1–C4 is not critical for proper operation; polarized or nonpolarized capacitors can be used. The charge pump requires 0.1µF capaci-tors for 3.3V operation. For other supply voltages, see Table 2 for required capacitor values. Do not use val-ues smaller than those listed in Table 2. Increasing the capacitor values (e.g., by a factor of 2) reduces ripple on the transmitter outputs and slightly reduces power consumption. C2, C3, and C4 can be increased without changing C1’s value. However, do not increase C1without also increasing the values of C2, C3, C4,and C BYPASS to maintain the proper ratios (C1 to the other capacitors).When using the minimum required capacitor values,make sure the capacitor value does not degradeexcessively with temperature. If in doubt, use capaci-tors with a larger nominal value. The capacitor’s equiv-alent series resistance (ESR), which usually rises at low temperatures, influences the amount of ripple on V+and V-.Power-Supply DecouplingIn most circumstances, a 0.1µF V CC bypass capacitor is adequate. In applications sensitive to power-supply noise, use a capacitor of the same value as charge-pump capacitor C1. Connect bypass capacitors as close to the IC as possible.Operation Down to 2.7VTransmitter outputs meet EIA/TIA-562 levels of ±3.7V with supply voltages as low as 2.7V.Figure 6b. Mouse Driver Test CircuitM A X 3222E /M A X 3232E /M A X 3237E /M A X 3241E †/M A X 3246EUp to 1Mbps, True RS-232 TransceiversFigure 7. Loopback Test CircuitT1IN T1OUTR1OUT5V/div5V/div5V/divV CC = 3.3V C1–C4 = 0.1μFFigure 8. MAX3241E Loopback Test Result at 120kbps T1INT1OUTR1OUT5V/div5V/div5V/divV CC = 3.3V, C1–C4 = 0.1μFFigure 9. MAX3241E Loopback Test Result at 250kbps+5V 0+5V 0-5V +5VT_INT_OUT5k Ω + 250pFR_OUTV CC = 3.3V C1–C4 = 0.1μFFigure 10. MAX3237E Loopback Test Result at 1000kbps (MBAUD = V CC )Transmitter Outputs Recoveringfrom ShutdownFigure 3 shows two transmitter outputs recovering from shutdown mode. As they become active, the two trans-mitter outputs are shown going to opposite RS-232 levels (one transmitter input is high; the other is low). Each transmitter is loaded with 3k Ωin parallel with 2500pF.The transmitter outputs display no ringing or undesir-able transients as they come out of shutdown. Note thatthe transmitters are enabled only when the magnitude of V- exceeds approximately -3.0V.Mouse DrivabilityThe MAX3241E is designed to power serial mice while operating from low-voltage power supplies. It has been tested with leading mouse brands from manu-facturers such as Microsoft and Logitech. The MAX3241E successfully drove all serial mice tested and met their current and voltage requirements.MAX3222E/MAX3232E/MAX3237E/MAX3241E †/MAX3246EUp to 1Mbps, True RS-232 TransceiversFigure 6a shows the transmitter output voltages under increasing load current at +3.0V. Figure 6b shows a typical mouse connection using the MAX3241E.High Data RatesThe MAX3222E/MAX3232E/MAX3237E/MAX3241E/MAX3246E maintain the RS-232 ±5V minimum transmit-ter output voltage even at high data rates. Figure 7shows a transmitter loopback test circuit. Figure 8shows a loopback test result at 120kbps, and Figure 9shows the same test at 250kbps. For Figure 8, all trans-mitters were driven simultaneously at 120kbps into RS-232 loads in parallel with 1000pF. For Figure 9, a single transmitter was driven at 250kbps, and all transmitters were loaded with an RS-232 receiver in parallel with 1000pF.The MAX3237E maintains the RS-232 ±5.0V minimum transmitter output voltage at data rates up to 1Mbps.Figure 10 shows a loopback test result at 1Mbps with MBAUD = V CC . For Figure 10, all transmitters were loaded with an RS-232 receiver in parallel with 250pF.Interconnection with 3V and 5V LogicThe MAX3222E/MAX3232E/MAX3237E/MAX3241E/MAX3246E can directly interface with various 5V logic families, including ACT and HCT CMOS. See Table 3for more information on possible combinations of inter-connections.UCSP ReliabilityThe UCSP represents a unique packaging form factor that may not perform equally to a packaged product through traditional mechanical reliability tests. UCSP reliability is integrally linked to the user’s assembly methods, circuit board material, and usage environ-ment. The user should closely review these areas when considering use of a UCSP package. Performance through Operating Life Test and Moisture Resistance remains uncompromised as the wafer-fabrication process primarily determines it.Mechanical stress performance is a greater considera-tion for a UCSP package. UCSPs are attached through direct solder contact to the user’s PC board, foregoing the inherent stress relief of a packaged product lead frame. Solder joint contact integrity must be consid-ered. Table 4 shows the testing done to characterize the UCSP reliability performance. In conclusion, the UCSP is capable of performing reliably through envi-ronmental stresses as indicated by the results in the table. Additional usage data and recommendations are detailed in the UCSP application note, which can be found on Maxim’s website at .Table 4. Reliability Test DataM A X 3222E /M A X 3232E /M A X 3237E /M A X 3241E †/M A X 3246EUp to 1Mbps, True RS-232 Transceivers__________________________________________________________Pin ConfigurationsMAX3222E/MAX3232E/MAX3237E/MAX3241E †/MAX3246EUp to 1Mbps, True RS-232 TransceiversPin Configurations (continued)M A X 3222E /M A X 3232E /M A X 3237E /M A X 3241E †/M A X 3246EUp to 1Mbps, True RS-232 Transceivers__________________________________________________Typical Operating CircuitsMAX3222E/MAX3232E/MAX3237E/MAX3241E †/MAX3246EUp to 1Mbps, True RS-232 Transceivers_____________________________________Typical Operating Circuits (continued)M A X 3222E /M A X 3232E /M A X 3237E /M A X 3241E †/M A X 3246EUp to 1Mbps, True RS-232 Transceivers_____________________________________Typical Operating Circuits (continued)MAX3222E/MAX3232E/MAX3237E/MAX3241E †/MAX3246EUp to 1Mbps, True RS-232 Transceivers______________________________________________________________________________________21Selector Guide___________________Chip InformationTRANSISTOR COUNT:MAX3222E/MAX3232E: 1129MAX3237E: 2110MAX3241E: 1335MAX3246E: 842PROCESS: BICMOSOrdering Information (continued)†Requires solder temperature profile described in the AbsoluteMaximum Ratings section. UCSP Reliability is integrally linked to the user’s assembly methods, circuit board material, and environment. Refer to the UCSP Reliability Notice in the UCSP Reliability section of this datasheet for more information.**EP = Exposed paddle.。