MAX232芯片资料手册.pdf

1、General DescriptionThe MAX220MAX249 family of line drivers/receivers isintended for all EIA/TIA-232E and V.28/V.24 communica-tions interfaces, particularly applications where 12V isnot available. These parts are especially useful in battery-powered sys-tems, since their low-power shutdown mode reduc

2、espower dissipation to less than 5W. The MAX225,MAX233, MAX235, and MAX245/MAX246/MAX247 useno external components and are recommended for appli-cations where printed circuit board space is critical. _ApplicationsPortable ComputersLow-Power ModemsInterface TranslationBattery-Powered RS-232 SystemsMu

3、ltidrop RS-232 Networks_FeaturesSuperior to Bipolara111 Operate from Single +5V Power Supply(+5V and +12VMAX231/MAX239)a111 Low-Power Receive Mode in Shutdown(MAX223/MAX242)a111 Meet All EIA/TIA-232E and V.28 Specificationsa111 Multiple Drivers and Receiversa111 3-State Driver and Receiver Outputsa1

4、11 Open-Line Detection (MAX243)Ordering InformationOrdering Information continued at end of data sheet.*Contact factory for dice specifications.MAX220MAX249+5V-Powered, Multichannel RS-232_ Maxim Integrated Products 1Selection Table19-4323; Rev 9; 4/00PARTMAX220CPEMAX220CSEMAX220CWE 0C to +70C0C to

5、+70C0C to +70CTEMP. RANGE PIN-PACKAGE16 Plastic DIP16 Narrow SO16 Wide SOMAX220C/D 0C to +70C Dice*MAX220EPEMAX220ESEMAX220EWE -40C to +85C-40C to +85C-40C to +85C 16 Plastic DIP16 Narrow SO16 Wide SOMAX220EJE -40C to +85C 16 CERDIPMAX220MJE -55C to +125C 16 CERDIPPower No. of Nominal SHDN RxPart Su

6、pply RS-232 No. of Cap. Value +7.5 to +13.2 same functions as MAX232MAX232 (MAX202) +5 2/2 4 1.0 (0.1) No 120 (64) Industry standardMAX232A +5 2/2 4 0.1 No 200 Higher slew rate, small capsMAX233 (MAX203) +5 2/2 0 No 120 No external capsMAX233A +5 2/2 0 No 200 No external caps, high slew rateMAX234 (

7、MAX204) +5 4/0 4 1.0 (0.1) No 120 Replaces 1488MAX235 (MAX205) +5 5/5 0 Yes 120 No external capsMAX236 (MAX206) +5 4/3 4 1.0 (0.1) Yes 120 Shutdown, three stateMAX237 (MAX207) +5 5/3 4 1.0 (0.1) No 120 Complements IBM PC serial portMAX238 (MAX208) +5 4/4 4 1.0 (0.1) No 120 Replaces 1488 and 1489MAX2

8、39 (MAX209) +5 and 3/5 2 1.0 (0.1) No 120 Standard +5/+12V or battery supplies; +7.5 to +13.2 single-package solution for IBM PC serial portMAX240 +5 5/5 4 1.0 Yes 120 DIP or flatpack packageMAX241 (MAX211) +5 4/5 4 1.0 (0.1) Yes 120 Complete IBM PC serial portMAX242 +5 2/2 4 0.1 Yes 200 Separate sh

9、utdown and enableMAX243 +5 2/2 4 0.1 No 200 Open-line detection simplifies cablingMAX244 +5 8/10 4 1.0 No 120 High slew rateMAX245 +5 8/10 0 Yes 120 High slew rate, int. caps, two shutdown modesMAX246 +5 8/10 0 Yes 120 High slew rate, int. caps, three shutdown modesMAX247 +5 8/9 0 Yes 120 High slew

10、rate, int. caps, nine operating modesMAX248 +5 8/8 4 1.0 Yes 120 High slew rate, selective half-chip enablesMAX249 +5 6/10 4 1.0 Yes 120 Available in quad flatpack packageFor free samples MAX233/MAX235, VCC= 5V 5% C1C4 = 1.0F; MAX231/MAX239,VCC= 5V 10%; V+ = 7.5V to 13.2V; TA= TMINto TMAX; unless ot

11、herwise noted.)Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functionaloperation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not

12、 implied. Exposure toabsolute maximum rating conditions for extended periods may affect device reliability.CONDITIONS MIN TYP MAX UNITSOutput Voltage Swing All transmitter outputs loaded with 3k to ground 5.0 7.3 VVCCPower-Supply CurrentNo load,TA= +25C510mA7150.4 1V+ Power-Supply Current1.8 5mA515S

13、hutdown Supply Current TA= +25C15 50VInput Logic Threshold HighTIN2.0EN, SHDN (MAX223);EN, SHDN (MAX230/235/236/240/241)2.4Logic Pull-Up Current TIN =0V 1.5 200Receiver Input VoltageOperating Range-30 30 VAA110VInput Logic Threshold Low TIN; EN, SHDN (MAX233); EN, SHDN (MAX230/235241) 0.8MAX231/239M

14、AX223/230/234238/240/241MAX232/233PARAMETERMAX239MAX230/235/236/240/241MAX231MAX223mAMAX220MAX249+5V-Powered, Multichannel RS-232Drivers/Receivers6 _V0.8 1.2PARAMETER MIN TYP MAX UNITSCONDITIONSNormal operationSHDN = 5V (MAX223)SHDN = 0V (MAX235/236/240/241)1.7 2.4RS-232 Input Threshold LowTA= +25C,

15、 VCC= 5V0.6 1.5VRS-232 Input Threshold HighTA= +25C,VCC= 5VShutdown (MAX223)SHDN = 0V,EN = 5V (R4IN R5IN)1.5 2.4ELECTRICAL CHARACTERISTICSMAX223/MAX230MAX241 (continued)(MAX223/230/232/234/236/237/238/240/241, VCC= +5V 10; MAX233/MAX235, VCC= 5V 5% C1C4 = 1.0F; MAX231/MAX239,VCC= 5V 10%; V+ = 7.5V t

16、o 13.2V; TA= TMINto TMAX; unless otherwise noted.)Shutdown (MAX223)SHDN = 0V,EN = 5V (R4IN, R5IN)Normal operationSHDN = 5V (MAX223)SHDN = 0V (MAX235/236/240/241)RS-232 Input Hysteresis VCC= 5V, no hysteresis in shutdown 0.2 0.5 1.0 VRS-232 Input Resistance TA= +25C, VCC= 5V 357kTTL/CMOS Output Volta

17、ge Low IOUT= 1.6mA (MAX231/232/233, IOUT= 3.2mA) 0.4 VTTL/CMOS Output Voltage High IOUT = -1mA 3.5 VCC- 0.4 VTTL/CMOS Output Leakage Current0V ROUT VCC; EN = 0V (MAX223); EN = VCC(MAX235241 )0.05 10 AMAX223 600nsReceiver Output Enable TimeNormal operationMAX235/236/239/240/241 400MAX223 900nsReceive

18、r Output Disable TimeNormal operationMAX235/236/239/240/241 250Normal operation 0.5 10sSHDN = 0V(MAX223)440Propagation DelayRS-232 IN toTTL/CMOS OUT,CL= 150pF6403 5.1 30V/sMAX231/MAX232/MAX233, TA= +25C, VCC= 5V, RL= 3k to 7k, CL= 50pF to 2500pF, measured from+3V to -3V or -3V to +3V430Transmitter O

19、utput Resistance VCC= V+ = V- = 0V, VOUT= 2V 300 Transmitter Output Short-CircuitCurrent10 mAtPHLStPLHSTransition Region Slew RateMAX223/MAX230/MAX234241, TA= +25C, VCC= 5V, RL= 3k to 7k CL= 50pF to 2500pF, measured from+3V to -3V or -3V to +3VMAX220MAX249+5V-Powered, Multichannel RS-232Drivers/Rece

20、ivers_ 78.56.54.5 5.5TRANSMITTER OUTPUTVOLTAGE (VOH) vs. VCC7.08.0MAX220-04VCC(V)VOH(V)5.07.51 TRANSMITTERLOADED3 TRANS-MITTERSLOADED4 TRANSMITTERSLOADED2 TRANSMITTERSLOADEDTA= +25CC1C4 = 1FTRANSMITTERLOADS =3k | 2500pF7.46.00 2500TRANSMITTER OUTPUT VOLTAGE (VOH)vs. LOAD CAPACITANCE ATDIFFERENT DATA

21、 RATES6.46.27.27.0MAX220-05LOAD CAPACITANCE (pF)VOH(V)15001000500 20006.86.6160kbits/sec80kbits/sec20kbits/secTA= +25CVCC= +5V3 TRANSMITTERS LOADEDRL= 3kC1C4 = 1F12.04.00 2500TRANSMITTER SLEW RATEvs. LOAD CAPACITANCE6.05.011.09.010.0MAX220-06LOAD CAPACITANCE (pF)SLEW RATE (V/s)15001000500 20008.07.0

22、TA= +25CVCC= +5VLOADED, RL= 3kC1C4 = 1F1 TRANSMITTER LOADED2 TRANSMITTERSLOADED3 TRANSMITTERSLOADED4 TRANSMITTERSLOADED-6.0-9.04.5 5.5TRANSMITTER OUTPUTVOLTAGE (VOL) vs. VCC-8.0-8.5-6.5-7.0MAX220-07VCC(V)VOL(V)5.0-7.54 TRANS-MITTERSLOADEDTA= +25CC1C4 = 1FTRANSMITTERLOADS =3k | 2500pF1 TRANS-MITTERLO

23、ADED2 TRANS-MITTERSLOADED3 TRANS-MITTERSLOADED-6.0-7.60 2500TRANSMITTER OUTPUT VOLTAGE (VOL)vs. LOAD CAPACITANCE ATDIFFERENT DATA RATES-7.0-7.2-7.4-6.2-6.4MAX220-08LOAD CAPACITANCE (pF)VOL(V)15001000500 2000-6.6-6.8160kbits/sec80kbits/sec20Kkbits/secTA= +25CVCC= +5V3 TRANSMITTERS LOADEDRL= 3kC1C4 =

24、1F10-100 5 10 15 20 25 30 35 40 45 50TRANSMITTER OUTPUT VOLTAGE (V+, V-)vs. LOAD CURRENT-2-6-4-886MAX220-09CURRENT (mA)V+, V- (V)420V+ AND V-EQUALLYLOADEDV- LOADED,NO LOADON V+TA= +25CVCC= +5VC1C4 = 1FALL TRANSMITTERS UNLOADEDV+ LOADED,NO LOADON V-_Typical Operating CharacteristicsMAX223/MAX230MAX24

25、1*SHUTDOWN POLARITY IS REVERSED FOR NON MAX241 PARTSV+, V- WHEN EXITING SHUTDOWN(1F CAPACITORS)MAX220-13SHDN*V-OV+500ms/divInput Logic Threshold LowMAX220MAX249+5V-Powered, Multichannel RS-232Drivers/Receivers8 _ABSOLUTE MAXIMUM RATINGSMAX225/MAX244MAX249ELECTRICAL CHARACTERISTICSMAX225/MAX244MAX249

26、(MAX225, VCC= 5.0V 5%; MAX244MAX249, VCC= +5.0V 10%, external capacitors C1C4 = 1F; TA= TMINto TMAX; unless oth-erwise noted.)Note 4: Input voltage measured with transmitter output in a high-impedance state, shutdown, or VCC= 0V.Stresses beyond those listed under “Absolute Maximum Ratings” may cause

27、 permanent damage to the device. These are stress ratings only, and functionaloperation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure toabsolute maximum rating conditions for extended periods may affec

28、t device reliability.Supply Voltage (VCC) .-0.3V to +6VInput VoltagesTIN ENA, ENB, ENR, ENT, ENRA,ENRB, ENTA, ENTB-0.3V to (VCC+ 0.3V)RIN.25VTOUT(Note 3).15VROUT-0.3V to (VCC+ 0.3V)Short Circuit (one output at a time)TOUTto GNDContinuousROUTto GNDContinuousContinuous Power Dissipation (TA= +70C)28-P

29、in Wide SO (derate 12.50mW/C above +70C) .1W40-Pin Plastic DIP (derate 11.11mW/C above +70C) .611mW44-Pin PLCC (derate 13.33mW/C above +70C) .1.07WOperating Temperature RangesMAX225C_ _, MAX24_C_ _ 0C to +70CMAX225E_ _, MAX24_E_ _ .-40C to +85CStorage Temperature Range .-65C to +160CLead Temperature

30、 (soldering,10sec) +300CVCC= 0V, VOUT= 15VATables 1a1d0.01 25Normal operationShutdownTables 1a1d, normal operationAll transmitter outputs loaded with 3k to GNDENA, ENB, ENT, ENTA, ENTB =VCC,VOUT = 15VVRS-232 Input HysteresisRS-232 Input Threshold Low VV5 7.5Output Voltage SwingOutput Leakage Current

31、 (shutdown)0.01 25300 10MVCC= V+ = V- = 0V, VOUT= 2V (Note 4)Transmitter Output ResistanceAPARAMETER0.05 0.10MIN TYP MAX UNITSNormal operation, outputs disabled,Tables 1a1d, 0V VOUT VCC, ENR_ = VCCTTL/CMOS Output Leakage Current10 30Shrinking VOUT= VCCmA-2 -10Sourcing VOUT= GNDV3.5 VCC- 0.2IOUT= -1.

32、0mATTL/CMOS Output Voltage HighV0.2 0.4IOUT= 3.2mATTL/CMOS Output Voltage Lowk3570.2 0.5 1.0VCC= 5V1.4 0.8 VTTL/CMOS Output Short-Circuit CurrentV1.8 2.40.8 1.3VCC= 5VRS-232 Input ResistanceV25RS-232 Input Voltage Operating RangemA7 30VOUT= 0VOutput Short-Circuit Currentkbits/sec120 64Data RateCONDI

33、TIONSVCC= 5VA0.01 1Logic Pull-Up/lnput Current10 50Tables 1a1dRS-232 Input Threshold HighV2 1.4Input Logic Threshold HighRS-232 TRANSMITTERSRS-232 RECEIVERSMAX220MAX249+5V-Powered, Multichannel RS-232Drivers/Receivers_ 9Operating Supply Voltage4.75 5.25VTransmitter Enable Time MAX225 10 20tETNo load

34、MAX244MAX249 11 3051030MAX225 40VCCSupply Current (normal operation)3k loads on all outputsMAX244MAX249 57mATransition Slew Rate825CL= 50pF to 2500pF, RL= 3k to 7k, VCC= 5V, TA= +25C, measured from +3V to -3V or -3V to +3VTA= TMINto TMAXCONDITIONS50V/sMAX246MAX249 (excludes charge-pump start-up)Shut

35、down Supply Current A5tPHLT1.3 3.5stPLHT1.5 3.5Transmitter Disable Time, Figure 4Transmitter Propagation DelayTLL to RS-232 (normal operation), Figure 1stDT100 nsTransmitter + to - Propagation Delay Difference (normal operation)tPHLT- tPLHTUNITSMIN TYP MAX350PARAMETERnsReceiver + to - Propagation De

36、lay Difference (normal operation)tPHLR- tPLHR350 ns4.5 5.5MAX244MAX249MAX225Leakage current 1Threshold low 1.4 0.8Control InputThreshold high 2.4 1.4VATA= +25CtPHLR0.6 1.5tPLHR0.6 1.5Receiver Propagation DelayTLL to RS-232 (normal operation),Figure 2stPHLS0.6 10tPLHS3.0 10Receiver Propagation Delay

37、TLL to RS-232 (low-power mode), Figure 2sReceiver-Output Enable Time, Figure 3 tER100 500 nsReceiver-Output Disable Time, Figure 3 tDR100 500 nsMAX225/MAX245MAX249(includes charge-pump start-up)10 msPOWER SUPPLY AND CONTROL LOGICAC CHARACTERISTICSNote 5: The 300 minimum specification complies with E

38、IA/TIA-232E, but the actual resistance when in shutdown mode or VCC=0V is 10M as is implied by the leakage specification.ELECTRICAL CHARACTERISTICSMAX225/MAX244MAX249 (continued)(MAX225, VCC= 5.0V 5%; MAX244MAX249, VCC= +5.0V 10%, external capacitors C1C4 = 1F; TA= TMINto TMAX; unless oth-erwise not

39、ed.)MAX220MAX249+5V-Powered, Multichannel RS-232Drivers/Receivers10 _Typical Operating CharacteristicsMAX225/MAX244MAX249182012345TRANSMITTER SLEW RATEvs. LOAD CAPACITANCE86416 MAX220-10LOAD CAPACITANCE (nF)TRANSMITTER SLEW RATE (V/s)141210VCC = 5VEXTERNAL POWER SUPPLY1F CAPACITORS 40kb/s DATA RATE

40、8 TRANSMITTERSLOADED WITH 3k10-100 5 10 15 20 25 30 35OUTPUT VOLTAGEvs. LOAD CURRENT FOR V+ AND V-2-4-6-88MAX220-11LOAD CURRENT (mA)OUTPUT VOLTAGE (V)6420V+ AND V- LOADEDEITHER V+ OR V- LOADEDV+ AND V- LOADEDVCC= 5VEXTERNAL CHARGE PUMP1F CAPACITORS 8 TRANSMITTERSDRIVING 5k AND2000pF AT 20kbits/secV-

41、 LOADEDV+ LOADED9.05.0012 345TRANSMITTER OUTPUT VOLTAGE (V+, V-)vs. LOAD CAPACITANCE ATDIFFERENT DATA RATES6.05.58.5MAX220-12LOAD CAPACITANCE (nF)V+, V (V)8.07.57.06.5VCC= 5V WITH ALL TRANSMITTERS DRIVENLOADED WITH 5k10kb/sec20kb/sec40kb/sec60kb/sec100kb/sec200kb/secALL CAPACITIORS 1FMAX220MAX249+5V

42、-Powered, Multichannel RS-232Drivers/Receivers_ 11INPUTOUTPUT+3VV+0VV-0VtPLHTtPHLTtPHLRtPHLStPLHRtPLHS50%VCC50%+3V50%INPUTOUTPUT*EXCEPT FOR R2 ON THE MAX243WHERE -3V IS USED.0V*50%GNDFigure 1. Transmitter Propagation-Delay Timing Figure 2. Receiver Propagation-Delay TimingENRX INa) TEST CIRCUITb) EN

43、ABLE TIMINGc) DISABLE TIMINGEN INPUTRECEIVEROUTPUTSRX OUTRX1k0V+3VENEN+0.8V+3.5VOUTPUT ENABLE TIME (tER)VCC- 2VVOL+ 0.5VVOH- 0.5VOUTPUT DISABLE TIME (tDR)VCC- 2V+3V0V150pFEN INPUTVOHRECEIVEROUTPUTSVOL1 OR 0 TX3k 50pF-5V+5VOUTPUT DISABLE TIME (tDT)V+SHDN+3V0VV-0Va) TIMING DIAGRAMb) TEST CIRCUITFigure

44、 3. Receiver-Output Enable and Disable Timing Figure 4. Transmitter-Output Disable TimingMAX220MAX249+5V-Powered, Multichannel RS-232Drivers/Receivers12 _ENT ENR OPERATION STATUS TRANSMITTERS RECEIVERS0 0 Normal Operation All Active All Active0 1 Normal Operation All Active All 3-State1 0 Shutdown A

45、ll 3-State All Low-Power Receive Mode1 1 Shutdown All 3-State All 3-StateTable 1a. MAX245 Control Pin ConfigurationsENT ENROPERATIONSTATUSTRANSMITTERS RECEIVERSTA1TA4 TB1TB4 RA1RA5 RB1RB50 0 Normal Operation All Active All Active All Active All Active0 1 Normal Operation All Active All ActiveRA1RA4

46、3-State,RA5 ActiveRB1RB4 3-State,RB5 Active1 0 Shutdown All 3-State All 3-StateAll Low-PowerReceive ModeAll Low-PowerReceive Mode1 1 Shutdown All 3-State All 3-StateRA1RA4 3-State,RA5 Low-PowerReceive ModeRB1RB4 3-State,RB5 Low-PowerReceive ModeTable 1b. MAX245 Control Pin ConfigurationsTable 1c. MAX246 Control Pin ConfigurationsENA ENBOPERATIONSTATUSTRANSMITTERS RECEIVERSTA1TA4 TB1TB4 RA1RA5 RB1RB50 0 Normal Operation All Active All Active A