MAX3244ECWI-T资料

来源：华佗小知识

元器件交易网www.cecb2b.com19-1339; Rev 9; 2/07

±15kV ESD-Protected, 1µA, 1Mbps, 3.0V to 5.5VRS-232 Transceivers with AutoShutdown Plus

,________________General Description

__Next Generation Device Features

The MAX3224E/MAX3225E/MAX3226E/MAX3227E/MAX3244E/MAX3245E are 3V-powered EIA/TIA-232♦For Space-Constrained Applications:

and V.28/V.24 communications interfaces with automat-MAX3228E/MAX3229E: ±15kV ESD-Protected,ic shutdown/wakeup features, high data-rate capabili-+2.5V to +5.5V, RS-232 Transceivers in UCSPties, and enhanced electrostatic discharge (ESD)MAX3222E/MAX3232E/MAX3241E†/MAX3246E:protection. All transmitter outputs and receiver inputs±15kV ESD-Protected, Down to 10nA, +3.0V toare protected to ±15kV using IEC 1000-4-2 Air-GapDischarge, ±8kV using IEC 1000-4-2 Contact Discharge,+5.5V, Up to 1Mbps, True RS-232 Transceiversand ±15kV using the Human Body Model.

(MAX3246E Available in UCSP™)

All devices achieve a 1µA supply current using Maxim’s♦For Low-Voltage or Data Cable Applications:revolutionary AutoShutdown Plus™ feature. TheseMAX3380E/MAX3381E: +2.35V to +5.5V, 1µA,devices automatically enter a low-power shutdown2Tx/2Rx RS-232 Transceivers with ±15kV mode when the RS-232 cable is disconnected or theESD-Protected I/O and Logic Pins

transmitters of the connected peripherals are inactive,and the UART driving the transmitter inputs is inactivefor more than 30 seconds. They turn on again whenOrdering Informationthey sense a valid transition at any transmitter or receiv-er input. AutoShutdown Plus saves power withoutT EMPchanges to the existing BIOS or operating system.

P ARTR ANGE PIN PKGPKG CODEThe MAX3225E/MAX3227E/MAX3245E also feature20 TQFN-MegaBaud™ operation, guaranteeing 1Mbps for high-MAX3224ECTP0°C to +70°CEP*T2055-5speed applications such as communicating with ISDNmodems. The MAX3224E/MAX3226E/MAX3244E guar-MAX3224ECUP0°C to +70°C20 TSSOP—antee 250kbps operation. The transceivers have a pro-MAX3224ECAP0°C to +70°C20 SSOP—prietary low-dropout transmitter output stage enabling20 Plastictrue RS-232 performance from a +3.0V to +5.5V supplyMAX3224ECPP0°C to +70°CDIP—with a dual charge pump. The charge pump requiresonly four small 0.1µF capacitors for operation from aMAX3224EETP-40°C to +85°C20 TQFN-3.3V supply. The MAX3224E–MAX3227E feature a logic-EP*T2055-5level output (READY) that asserts when the chargeMAX3224EEUP-40°C to +85°C20 TSSOP—pump is regulating and the device is ready to beginMAX3224EEAP-40°C to +85°C20 SSOP—transmitting.

All devices are available in a space-saving TQFN,MAX3224EEPP-40°C to +85°C20 PlasticDIP—SSOP, and TSSOP (MAX3224E/MAX3225E/MAX3244E/MAX3245E) packages.

MAX3224EAAP-40°C to +125°C20 SSOP—*EP = Exposed paddle.

________________________Applications

Ordering Information continued at end of data sheet.

Notebook, Subnotebook, and Palmtop ComputersCellular Phones

_____________________Selector GuideBattery-Powered EquipmentHand-Held EquipmentNO. OF GUARANTEEDAuto-PARTDRIVERS/DATA RATEREADYShutdownPeripheralsRECEIVERS(bps)OUTPUTPlusPrinters

MAX3224E2/2250k✔✔†Covered by U.S. Patent numbers 4,636,930; 4,679,134; 4,777,577;

MAX3225E2/21M✔✔4,797,9; 4,809,152; 4,7,774; 4,999,761; 5,9,210; and otherMAX3226E1/1250k✔✔patents pending.

MAX3227E1/11M✔✔AutoShutdown Plus, MegaBaud, and UCSP are trademarks of MAX3244E3/5250k—✔Maxim Integrated Products, Inc.

MAX3245E3/51M—✔________________________________________________________________Maxim Integrated Products

For pricing, delivery, and ordering information,please contact Maxim/Dallas Direct!at 1-888-629-42, or visit Maxim’s website at www.maxim-ic.com.

MAX3224E–MAX3227E/MAX3244E/MAX3245E†元器件交易网www.cecb2b.com±15kV ESD-Protected, 1µA, 1Mbps, 3.0V to 5.5V,RS-232 Transceivers with AutoShutdown PlusMAX3224E–MAX3227E/MAX3244E/MAX3245E†ABSOLUTE MAXIMUM RATINGS

VCCto GND..............................................................-0.3V to +6V20-Pin TQFN (derate 21.3mW/°C above +70°C)....1702.1mWV+ to GND (Note 1)..................................................-0.3V to +7V20-PinPlastic DIP (derate 11.11mW/°C above +70°C)...8mWV- to GND (Note 1)...................................................+0.3V to -7V20-Pin SSOP (derate 8.00mW/°C above +70°C).........0mWV+ +⏐V-⏐(Note 1)................................................................+13V20-Pin TSSOP (derate 10.9mW/°C above +70°C).......879mWInput Voltages28-Pin Wide SO (derate 12.5mW/°C above +70°C)............1WT_IN, FORCEON, FORCEOFFto GND................-0.3V to +6V28-Pin SSOP (derate 9.52mW/°C above +70°C).........762mWR_IN to GND....................................................................±25V28-Pin TSSOP (derate 12.8mW/°C above +70°C).......1026mWOutput Voltages36-Pin TQFN (derate 26.3mW/°C above +70°C)...........2105mWT_OUT to GND.............................................................±13.2VOperating Temperature RangesR_OUT, INVALID, READY to GND.........-0.3V to (VCC+ 0.3V)MAX32_ _EC_ _.................................................0°C to +70°CShort-Circuit DurationMAX32_ _EE_ _................................................-40°C to +85°CT_OUT to GND.......................................................ContinuousMAX32_ _EAA_..............................................-40°C to +125°CContinuous Power Dissipation (TA= +70°C)Storage Temperature Range.............................-65°C to +160°C16-Pin SSOP (derate 7.14mW/°C above +70°C).........571mWLead Temperature (soldering, 10s).................................+300°C16-Pin TSSOP (derate 9.4mW/°C above +70°C)......754.7mW16-Pin TQFN (derate 20.8mW/°C above +70°C)....1666.7mW

Note 1:V+ and V- can have maximum magnitudes of 7V, but their absolute difference cannot exceed 13V.

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 implied. Exposure toabsolute maximum rating conditions for extended periods may affect device reliability.

ELECTRICAL CHARACTERISTICS

(VCC= +3V to +5.5V, C1–C4 = 0.1µF, tested at 3.3V ±10%; C1= 0.047µF, C2–C4 = 0.33µF, tested at 5.0V ±10%; TA= TMINto TMAX,unless otherwise noted. Typical values are at TA= +25°C.)

PARAMETERSupply Current,AutoShutDown PlusSupply Current, ShutdownSupply Current, AutoShutDown Plus DisabledLOGIC INPUTS AND RECEIVER OUTPUTSInput Logic Threshold LowInput Logic Threshold HighTransmitter Input Hysteresis Input Leakage CurrentOutput Leakage CurrentOutput Voltage LowOutput Voltage HighRECEIVER INPUTSInput Voltage RangeInput Threshold LowInput Threshold HighInput HysteresisInput Resistance2TA= +25°C3TA= +25°CTA= +25°CVCC= 3.3VVCC= 5.0VVCC= 3.3VVCC= 5.0V-250.60.81.21.51.51.80.5572.42.4+25VVVVkΩT_IN, FORCEON, FORCEOFFR_OUT (MAX3244E/MAX3245E), receivers disabledIOUT= 1.6mAIOUT= -1.0mAVCC- 0.6 VCC- 0.1T_IN, FORCEON, FORCEOFFT_IN, FORCEON,FORCEOFFVCC= 3.3VVCC= 5.0V22.40.5±0.01±0.05±1±100.40.8VVVµAµAVVSYMBOLCONDITIONSFORCEON = GND, FORCEOFF= VCC,all R_IN idle, all T_IN idleFORCEOFF= GNDFORCEON = FORCEOFF= VCC, no loadMINTYPMAXUNITSDC CHARACTERISTICS(VCC= 3.3V or 5.0V, TA= +25°C)110.310101µAµAmA_______________________________________________________________________________________元器件交易网www.cecb2b.com±15kV ESD-Protected, 1µA, 1Mbps, 3.0V to 5.5VRS-232 Transceivers with AutoShutdown Plus

,ELECTRICAL CHARACTERISTICS (continued)

(VCC= +3V to +5.5V, C1–C4 = 0.1µF, tested at 3.3V ±10%; C1= 0.047µF, C2–C4 = 0.33µF, tested at 5.0V ±10%; TA= TMINto TMAX,unless otherwise noted. Typical values are at TA= +25°C.)

PARAMETERSYMBOLCONDITIONSMINTYPMAXUNITSTRANSMITTER OUTPUTSOutput Voltage SwingAll transmitter outputs loaded with 3kΩtoground±5±5.4VOutput ResistanceVCC= V+ = V- = 0, transmitter outputs = ±2V30010MΩOutput Short-Circuit Current±60mAOutput Leakage CurrentVCC= 0 or 3V to 5.5V, VOUT= ±12V,Transmitters disabled±25µAMOUSE DRIVEABILITY(MAX3244E/MAX3245E)T1IN = T2IN = GND, T3IN = VCC,Transmitter Output VoltageT3OUT loaded with 3kΩto GND,T1OUT and T2OUT loaded with ±5V2.5mA eachESD PROTECTIONIEC1000-4-2 Air Discharge±15R_IN, T_OUTIEC1000-4-2 Contact Discharge±8kVHuman Body Model±15AutoShutdown Plus(FORCEON = GND, FORCEOFF= VCC)Receiver Input Threshold toINVALIDOutput HighFigure 4aPositive threshold2.7Negative threshold-2.7VReceiver Input Threshold toINVALIDOutput LowFigure 4a-0.3+0.3VINVALID, READY Output Voltage LowIOUT= -1.6mA0.4V(MAX3224E–MAX3227E)INVALID, READY Output Voltage HighIOUT= -1.0mAVCC - 0.6V(MAX3224E–MAX3227E)Receiver Positive or NegativeThreshold to INVALIDHightINVHVCC= 5V, Figure 4b1µsReceiver Positive or NegativeThreshold to INVALIDLowtINVLVCC= 5V, Figure 4b30µsReceiver or Transmitter Edge toTransmitters EnabledtWUVCC= 5V, Figure 5b (Note 2)100µsReceiver or Transmitter Edge toTransmitters ShutdowntAUTOSHDNVCC= 5V, Figure 5b (Note 2)153060s_______________________________________________________________________________________3

(VCC= +3V to +5.5V, C1–C4 = 0.1µF, tested at 3.3V ±10%; C1= 0.047µF, C2–C4 = 0.33µF, tested at 5.0V ±10%; TA= TMINto TMAX,unless otherwise noted. Typical values are at TA= +25°C.)

PARAMETERMaximum Data RateReceiver Propagation DelayReceiver Output Enable TimeReceiver Output Disable TimeTransmitter SkewReceiver Skew⏐tPHL- tPLH ⏐⏐tPHL- tPLH ⏐tPHLtPLHSYMBOLCONDITIONSRL= 3kΩ, CL= 1000pF,one transmitter switchingR_IN to R_OUT, CL= 150pFNormal operation (MAX3244E only)Normal operation (MAX3244E only)(Note 3)VCC= 3.3V, TA= +25°C,RL= 3kΩto 7kΩ, measured from +3V to -3Vor -3V to +3V, one trans-mitter switchingMIN2500.150.1520020010050CL= 150pFto 1000pFTYPMAXUNITSkbpsµsnsnsnsnsTransition-Region Slew Rate630V/µsTIMING CHARACTERISTICS—MAX3225E/MAX3227E/MAX3245E

(VCC= +3V to +5.5V, C1–C4 = 0.1µF, tested at 3.3V ±10%; C1= 0.047µF, C2–C4 = 0.33µF, tested at 5.0V ±10%; TA= TMINto TMAX,unless otherwise noted. Typical values are at TA= +25°C.)

PARAMETERSYMBOLCONDITIONSRL= 3kΩ, CL= 1000pF, one transmitter switchingMaximum Data RateVCC= 3.0V to 4.5V, RL= 3kΩ, CL= 250pF, one transmitter switchingVCC= 4.5V to 5.5V, RL= 3kΩ, CL= 1000pF, one transmitter switchingReceiver Propagation DelayReceiver Output Enable TimeReceiver Output Disable TimeTransmitter SkewReceiver Skew⏐tPHL- tPLH ⏐⏐tPHL- tPLH ⏐tPHLtPLHR_IN to R_OUT, CL= 150pFNormal operation (MAX3245E only)Normal operation (MAX3245E only)(Note 3)MIN250100010000.150.152002002550µsnsnsnsnsV/µskbpsTYPMAXUNITSVCC= 3.3V, TA= +25°C, RL= 3kΩto 7kΩ, CL= 150pF to 1000pF,Transition-Region Slew Rate24150measured from +3V to -3V or -3V to +3V,one transmitter switchingNote 2:A transmitter/receiver edge is defined as a transition through the transmitter/receiver input logic thresholds.Note 3:Transmitter skew is measured at the transmitter zero cross points.

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,__________________________________________Typical Operating Characteristics

(VCC= +3.3V, 250kbps data rate, 0.1µF capacitors, all transmitters loaded with 3kΩand CL, TA= +25°C, unless otherwise noted.)

MAX3224E/MAX3226E

MAX3224E/MAX3226ETRANSMITTER OUTPUT VOLTAGE

MAX3224E/MAX3226E

OPERATING SUPPLY CURRENT vs. LOAD CAPACITANCE

SLEW RATE vs. LOAD CAPACITANCE

vs. LOAD CAPACITANCE

6116245

3000---EEE555444/V//OUT+41444)5V444//40/777(--- E44422G2233250kbps4223AXX)35XT3T1 TRANSMITTING AT 250kbpsA12AMMAAL)smMO(V2T2 (MAX3224E) TRANSMITTING AT 15.6kbpsμ /T30 TV10-SLEWN120kbpsU( EP1ERTTAR25UR8+SLEWUO0 C W RY20E-1ELTLPTS6PIM-2U1520kbpsS4

SN-3A10

RT-4-5VOUT-2

FOR DATA RATES UP TO 250kbps5T1 TRANSMITTING AT 250kbpsT2 (MAX3224E) TRANSMITTING AT 15.6kbps-6

1000

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LOAD CAPACITANCE (pF)LOAD CAPACITANCE (pF)LOAD CAPACITANCE (pF)

MAX3225E/MAX3227E

MAX3225E/MAX3227ETRANSMITTER OUTPUT VOLTAGE

MAX3225E/MAX3227E

OPERATING SUPPLY CURRENTvs. LOAD CAPACITANCE

SLEW RATE vs. LOAD CAPACITANCE

vs. LOAD CAPACITANCE

7.54805100

6000---EEE55441 TRANSMITTER AT FULL DATA RATE54///)4490V4704//(77 --1 TRANSMITTER AT 1/16 DATA RATE44/7E5.0

4422G223380(MAX3225E)-4223AXXTA60A)L2MbpsMMAOm70LOAD = 3kΩ + CXLAM(V2.51.5Mbps)1Mbpssμ-SLEW T /T1 TRANSMITTER AT FULL DATA RATEV50

NU( E602MbpsPERTRU1 TRANSMITTER AT 1/16 DATA RATEUO0T+SLEWA(MAX3225E)R40 C50 RWY1.5MbpsELOAD = 3kΩ + CLLETLP40TPIM-2.52Mbps1.5Mbps1MbpsS30USS30N20AR20

1MbpsT-5.0101 TRANSMITTER AT 1Mbps1 TRANSMITTER AT 62.5kbps (MAX3225E)10-7.5

500

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20002500

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LOAD CAPACITANCE (pF)LOAD CAPACITANCE (pF)LOAD CAPACITANCE (pF)

MAX3225E/MAX3227EMAX3224E–MAX3227EMAX3224E–MAX3227ETRANSMITTER SKEW READY TURN-ON TIME READY TURN-OFF TIME vs. LOAD CAPACITANCE

vs. TEMPERATURE

50738800200

901 TRANSMITTER AT 512kbps-E--EE4555544//41 TRANSMITTER AT 30kbps3441804/44///77740-4--(MAX3225E)442222)2)2)3s3s1603sXAXnXn35LOAD = 3kΩ + CLMμ34A(A((M EEWM140MEIK30M32ITT S NF120 RFE25O30O-TN-TN100IRRM20U28USTT Y 80NYA15AVERAGE: 10 PARTSDDRA26EATE60RR102440522200

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3000-40-20020406080100-40-20020406080100

LOAD CAPACITANCE (pF)TEMPERATURE (°C)TEMPERATURE (°C)

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(VCC= +3.3V, 250kbps data rate, 0.1µF capacitors, all transmitters loaded with 3kΩand CL, TA= +25°C, unless otherwise noted.)

MAX3244E

TRANSMITTER OUTPUT VOLTAGE

vs. LOAD CAPACITANCE

MAX3224-7/44/45E-10MAX3244E

SLEW RATE vs. LOAD CAPACITANCE

MAX3224-7/44/45E-11MAX3244E

OPERATING SUPPLY CURRENT vs. LOAD CAPACITANCE

1 TRANSMITTER AT 250kbps2 TRANSMITTERS AT 15.6kbps250kbps120kbpsMAX3224-7/44/45E-126TRANSMITTER OUTPUT VOLTAGE (V)543210-1-2-3-4-5-6

1000

2000

3000

1 TRANSMITTER AT 250kbps2 TRANSMITTERS AT 15.6kbpsVOUT+1412SLEW RATE (V/μs)108

6050SUPPLY CURRENT (mA)4030

20kbps20100

VOUT-4000

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010002000300040005000

LOAD CAPACITANCE (pF)LOAD CAPACITANCE (pF)LOAD CAPACITANCE (pF)

MAX3245E

TRANSMITTER OUTPUT VOLTAGE

vs. LOAD CAPACITANCE

MAX3224-7/44/45E-13MAX3245E

SLEW RATE vs. LOAD CAPACITANCE

MAX3224-7/44/45E-147.5TRANSMITTER OUTPUT VOLTAGE (V)5.0

2Mbps2.50-2.5-5.0-7.5

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1200

16001.5Mbps1 TRANSMITTER AT FULL DATA RATE2 TRANSMITTERS AT 1/16 DATA RATE2Mbps1.5Mbps1Mbps1Mbps7060SLEW RATE (V/μs)50403020100

1 TRANSMITTER AT 1Mbps2 TRANSMITTERS AT 62.5kbps0

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MAX3245E

OPERATING SUPPLY CURRENT vs. LOAD CAPACITANCE

MAX3224-7/44/45E-15MAX3245ETRANSMITT SKEW vs. LOAD CAPACITANCE

4540TRANSMITTER SKEW (ns)353025201510

MAX3224-7/44/45E-161009080SUPPLY CURRENT (mA)706050403020100

400

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1600

1 TRANSMITTER AT FULL DATA RATE2 TRANSMITTERS AT 1/16 DATA RATE1Mbps2Mbps1.5Mbps50

2000

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3000

LOAD CAPACITANCE (pF)LOAD CAPACITANCE (pF)

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元器件交易网www.cecb2b.com±15kV ESD-Protected, 1µA, 1Mbps, 3.0V to 5.5VRS-232 Transceivers with AutoShutdown Plus

,______________________________________________________________Pin DescriptionPINMAX3224EMAX3226EMAX3225EMAX3227EMAX3244EMAX3245EMAX3245EDIP/SO/ SSOP/ TSSOP(TQFN)NAMEFUNCTIONTQFNSSOP/TQFNSSOP/TSSOPTSSOPReady to Transmit Output,active-high. READY is191141——READYenabled high when V- goesbelow -4V and the device isready to transmit.Positive Terminal of Voltage-121622831C1+Doubler Charge-PumpCapacitor2031532730V++5.5V generated by thecharge pumpNegative Terminal of24142426C1-Voltage-Doubler Charge-Pump CapacitorPositive Terminal of3525133C2+Inverting Charge-PumpCapacitorNegative Terminal of4636234C2-Inverting Charge-PumpCapacitor5747335V--5.5V Generated by theCharge Pump6, 158, 1710139, 10, 117, 8, 9T_OUTRS-232 Transmitter Outputs7, 149, 16584-81-5R_INRS-232 Receiver Inputs8, 1310, 156915-1915, 16, 17,TTL/CMOS Receiver19, 20R_OUTOutputsValid Signal DetectorOutput, active low. A logic9117102123INVALIDhigh indicates that a validRS-232 level is present on areceiver input._______________________________________________________________________________________7

MAX3224E–MAX3227E/MAX3244E/MAX3245E†元器件交易网www.cecb2b.com±15kV ESD-Protected, 1µA, 1Mbps 3.0V to 5.5V,RS-232 Transceivers with AutoShutdown PlusMAX3224E–MAX3227E/MAX3244E/MAX3245E†______________________________________________________________Pin DescriptionPINMAX3224EMAX3225EMAX3226EMAX3227EMAX3244EMAX3245EDIP/ SSOP/ TSSOPMAX3245ETQFNNAMEFUNCTIONTQFNDIP/SSOP/TSSOP12, 13TQFNSSOP/TSSOP1112-1411, 12, 13T_INTTL/CMOS TransmitterInputsForce-On Input, Active High.Drive high to overrideAutoShutdown Plus, keepingtransmitters and receiverson (FORCEOFF must behigh) (Table 1).Ground+3.0V to +5.5V SingleSupply VoltageForce-Off Input, Active Low.Drive low to shut downtransmitters, receivers(except R2OUTB), andcharge pump. Thisoverrides AutoShutdownPlus and FORCEON (Table1).TTL/CMOS NoninvertingComplementary ReceiverOutputs. Always active.No Connection. Notinternally connected.Exposed Paddle. Solder theexposed paddle to theground plane or leaveunconnected.10, 11812149122325FORCEON161718191112141525262729GNDVCC182013162224FORCEOFF————2021R2OUTB—————6, 10, 14,18, 22, 28,32, 36N.C.EP—EP——EPEP_______________Detailed DescriptionDual Charge-Pump Voltage Converter

The MAX3224E–MAX3227E/MAX3244E/MAX3245E’sinternal power supply consists of a regulated dualcharge pump that provides output voltages of +5.5V(doubling charge pump) and -5.5V (inverting chargepump), over the +3.0V to +5.5V range. The chargepump operates in discontinuous mode: if the outputvoltages are less than 5.5V, the charge pump is

enabled; if the output voltages exceed 5.5V, thecharge-pump is disabled. Each charge pump requiresa flying capacitor (C1, C2) and a reservoir capacitor(C3, C4) to generate the V+ and V- supplies.

The READY output (MAX3224E–MAX3227E) is lowwhen the charge pumps are disabled in shutdownmode. The READY signal asserts high when V- goesbelow -4V.

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,POWER-VCCMANAGEMENTFORCEOFFUNIT ORFORCEONKEYBOARDCONTROLLERINVALIDPROTECTIONDIODEPREVIOUSMAX3244ERS-232MAX3245EVCCRxIUART5kΩTxI/OGNDSHDN = GNDCPUCHIPWITHUARTRS-232 a) OLDER RS-232: POWERED-DOWN UART DRAWS CURRENT FROM ACTIVE RECEIVER OUTPUT IN SHUTDOWN.VCCTOμPLOGICTRANSITIONDETECTORFigure 1. Interface Under Control of PMU

IMAX3244EPROTECTIONMAX3245EDIODERS-232 Transmitters

R2OUTBThe transmitters are inverting level translators that VCCconvert CMOS-logic levels to 5.0V EIA/TIA-232 levels.The MAX3224E/MAX3226E/MAX3244E guarantee aRxR2OUTR2IN250kbps data rate (1Mbps, for the MAX3225E/MAX3227E/MAX3245E) with worst-case loads of 3kΩin parallel withUARTTHREE-STATED5kΩ1000pF, providing compatibility with PC-to-PC com-munication software (such as LapLink™). TransmittersTxT1INT1OUTcan be paralleled to drive multiple receivers. Figure 1shows a complete system connection.

GNDFORCEOFF = GNDWhen FORCEOFFis driven to ground or when the Auto-Shutdown Plus circuitry senses that all receiver andtransmitter inputs are inactive for more than 30s, the b) NEW MAX3244E/MAX3245E: IN SHUTDOWN, R2OUTB IS USED TO MONITORtransmitters are disabled and the outputs go into a high- EXTERNAL DEVICES AND R2OUT IS THREE STATED, ELIMINATING A CURRENTimpedance state. When powered off or shut down, the PATH THROUGH THE UART'S PROTECTION DIODE.outputs can be driven to ±12V. The transmitter inputsdo not have pullup resistors. Connect unused inputs toGND or VFigure 2. The MAX3244E/MAX3245E detect RS-232 activityCC.

when the UART and interface are shut down.

LapLink is a trademark of Traveling Software.

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OPERATIONSTATUSVALIDRECEIVERLEVELRECEIVER ORTRANSMITTEREDGE WITHIN30sXR_OUT(MAX3224E/MAX3225E/MAX3226E/MAX3227E)ActiveR_OUT(MAX3244E/MAX3245E)R2OUTB(MAX3244E/MAX3245E)FORCEONFORCEOFFT_OUTShutdown(Forced Off)Normal Operation(Forced On)Normal Operation(AutoShutdownPlus)Shutdown (Auto-Shutdown Plus)Normal Operation Normal OperationShutdownNormal Operation(AutoShutdown)Shutdown(AutoShutdown)X = Don’t care

X0XHigh-ZHigh-ZActive11XXActiveActiveActiveActive01XYesActiveActiveActiveActive0INVALID*INVALID*INVALID*INVALID*1111INVALID**XYesXNoYesNoXYesNoXHigh-ZActive ActiveHigh-ZActiveActiveActiveActiveActiveActiveActiveActiveActiveActiveActiveActiveActiveActiveActiveActiveINVALID*INVALID**NoXHigh-ZActiveHigh-ZActive*INVALIDconnected to FORCEON

**INVALIDconnected to FORCEON and FORCEOFFRS-232 Receivers

The receivers convert RS-232 signals to CMOS-logicoutput levels. The MAX3224E–MAX3227E featureinverting outputs that always remain active (Table 1).The MAX3244E/MAX3245E have inverting three-stateoutputs that are high impedance when shut down(FORCEOFF= GND) (Table 1).

The MAX3244E/MAX3245E feature an extra, alwaysactive, noninverting output, R2OUTB. R2OUTB outputmonitors receiver activity while the other receivers arehigh impedance, allowing ring indicator applications tobe monitored without forward biasing other devicesconnected to the receiver outputs. This is ideal for sys-tems where VCCis set to ground in shutdown toaccommodate peripherals such as UARTs (Figure 2).

The MAX3224E–MAX3227E/MAX3244E/MAX3245E fea-ture an INVALIDoutput that is enabled low when novalid RS-232 voltage levels have been detected on allreceiver inputs. Because INVALIDindicates the receiv-er input’s condition, it is independent of FORCEON andFORCEOFFstates (Figures 3 and 4).

AutoShutdown Plus Mode

The MAX3224E–MAX3227E/MAX3244E/MAX3245Eachieve a1µA supplycurrentwith Maxim’s AutoShutdownPlus feature, which operates when FORCEOFFis highand a FORCEON is low. When these devices do notsense a valid signal transition on any receiver and trans-mitter input for 30s, the on-board charge pumps areshut down, reducing supply current to 1µA. This occursif the RS-232 cable is disconnected or if the connected

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,+0.3VT_INEDGEDETECTFORCEOFFR_INS30µs30sAUTOSHDNTIMERINVALIDR_INEDGETIMER-0.3VRDETECTRINVALID ASSERTED IF ALL RECEIVER INPUTS ARE BETWEEN +0.3V AND -0.3V FORAT LEAST 30μs.FORCEONFigure 3a. INVALIDFunctional Diagram, INVALIDLowFigure 3c. AutoShutdown Plus Logic

+2.7VFORCEOFFPOWERDOWN*R_INFORCEON30µsTIMERINVALIDAUTOSHDN-2.7VR* POWERDOWN IS ONLY AN INTERNAL SIGNAL.INVALID DEASSERTED IF ANY RECEIVER INPUT HAS BEEN BETWEEN +2.7V AND -2.7V IT CONTROLS THE OPERATIONAL STATUS OFFOR LESS THAN 30μs. THE TRANSMITTERS AND THE POWER SUPPLIES.Figure 3b. INVALIDFunctional Diagram, INVALIDHigh

Figure 3d. Power-Down Logic

When shut down, the device’s charge pumps turn off,Table 2. INVALIDTruth TableV+ is pulled to Vter outputs are high impedance, and READYCC, V- is pulled to ground, the transmit-RS-232 SIGNAL(MAX3224E–MAX3227E) is driven low. The timePRESENT AT ANYINVALIDOUTPUTrequired to exit shutdown is typically 100µs (Figure 8).RECEIVER INPUTBy connecting FORCEON to INVALID, the MAX3224E–YesHighMAX3227E/MAX3244E/MAX3245E shut down when noNoLowvalid receiver level and no receiver or transmitter edge isdetected for 30s, and wake up when a valid receiverperipheral transmitters are turned off, and the UART dri-level or receiver or transmitter edge is detected.

ving the transmitter inputs is inactive. The system turnson again when a valid transition is applied to anyRS-232 receiver or transmitter input. As a result, the sys-tem saves power without changes to the existing BIOSINVALID HIGHor operating system.

+2.7VSLFigures 3a and 3b depict valid and invalid RS-232EINDETERMINATEVELreceiver voltage levels. INVALIDindicates the receiver TU+0.3Vinput’s condition, and is independent of FORCEON andPN0INVALID LOWI FORCEOFFstates. Figure 3 and Tables 1 and 2 sum-REV-0.3VImarize the operating modes of the MAX3224E–ECEINDETERMINATEMAX3227E/MAX3244E/MAX3245E. FORCEON andRFORCEOFFoverride AutoShutdown Plus circuitry.-2.7VWhen neither control is asserted, the IC selectsINVALID HIGHbetween these states automatically based on the lastreceiver or transmitter input edge received.

Figure 4a. Receiver Positive/Negative Thresholds for INVALID______________________________________________________________________________________

MAX3224E–MAX3227E/MAX3244E/MAX3245E†元器件交易网www.cecb2b.com±15kV ESD-Protected, 1µA, 1Mbps 3.0V to 5.5V,RS-232 Transceivers with AutoShutdown PlusMAX3224E–MAX3227E/MAX3244E/MAX3245E†RECEIVERINPUTS}REGIONINVALIDTRANSMITTERINPUTSTRANSMITTEROUTPUTSINVALIDOUTPUTVCC0*VCCREADY0V+VCC0V-*MAX3224E–MAX3227EtINVLtINVHtAUTOSHDNtWUtAUTOSHDNtWUFigure 4b. AutoShutdown Plus, INVALID,and READY Timing Diagram

By connecting FORCEON and FORCEOFFto INVALID,the MAX3224E–MAX3227E/MAX3244E/MAX3245Eshutdown when no valid receiver level is detected andwake up when a valid receiver level is detected (samefunctionality as AutoShutdown feature on MAX3221E/MAX3223E/MAX3243E).

A mouse or other system with AutoShutdown Plus mayneed time to wake up. Figure 5 shows a circuit thatforces the transmitters on for 100ms, allowing enoughtime for the other system to realize that the MAX3244E/MAX3245E is awake. If the other system outputs validRS-232 signal transitions within that time, the RS-232ports on both systems remain enabled.

discharges encountered during handling and assembly.The driver outputs and receiver inputs of theMAX3224E–MAX3227E/MAX3244E/MAX3245Ehave extraprotection against static electricity. Maxim’s engineershave developed state-of-the-art structures to protect

POWER-MANAGEMENTUNITMASTER SHDN LINE0.1μF1MΩFORCEOFFFORCEONSoftware-Controlled Shutdown

If direct software control is desired, use INVALIDtoindicate DTR or ring indicator signal. Tie FORCEOFFand FORCEON together to bypass the AutoShutdownPlus so the line acts like a SHDNinput.

MAX3224EMAX3225EMAX3226EMAX3227EMAX3244EMAX3245E±15kV ESD Protection

As with all Maxim devices, ESD-protection structures areincorporated on all pins to protect against electrostatic

Figure 5. AutoShutdown Plus Initial Turn-On to Wake Up aMouse or Another System

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,RC 1MΩRD 1500ΩRC 50MΩ to 100MΩRD 330ΩCHARGE-CURRENTDISCHARGECHARGE CURRENTDISCHARGELIMIT RESISTORRESISTANCELIMIT RESISTORRESISTANCEHIGH-DEVICEHIGH- DEVICEVOLTAGECsSTORAGEUNDERVOLTAGECsSTORAGEUNDERDC100pFCAPACITORTESTDC150pFCAPACITORTESTSOURCESOURCEFigure 6a. Human Body ESD Test ModelFigure 7a. IEC1000-4-2 ESD Test Model

IIP 100%I90%rPEAK-TO-PEAK RINGING100%(NOT DRAWN TO SCALE)90%AMPERES36.8%KAEPI10%00tRLTIMEtDLCURRENT WAVEFORM10%Figure 6b. Human Body Current Waveform

tr = 0.7ns to 1nst30nsthese pins against ESD of ±15kV without damage. The60nsESD structures withstand high ESD in all states: normaloperation, shutdown, and powered down. After an ESDevent, Maxim’s E versions keep working withoutFigure 7b. IEC1000-4-2 ESD Generator Current Waveform

latchup, whereas competing RS-232 products canlatch and must be powered down to remove latchup.ESD Test Conditions

ESD protection can be tested in various ways; theESD performance depends on a variety of conditions.transmitter outputs and receiver inputs of this productContact Maxim for a reliability report that documentsfamily are characterized for protection to the followingtest setup, test methodology, and test results.

limits:

Human Body Model

1)±15kV using the Human Body Model

Figure 6a shows the Human Body Model and Figure 6b2)±8kV using the Contact-Discharge Method specified shows the current waveform it generates when dis-in IEC1000-4-2

charged into a low impedance. This model consists ofa 100pF capacitor charged to the ESD voltage of inter-3)±15kV using IEC1000-4-2’s Air-Gap Method.

est, which is then discharged into the test devicethrough a 1.5kΩresistor.

______________________________________________________________________________________13

The IEC1000-4-2 standard covers ESD testing and per-formance of finished equipment; it does not specificallyrefer to integrated circuits. The MAX3224E–MAX3227E,MAX3244E/MAX3245E help you design equipment thatmeets Level 4 (the highest level) of IEC1000-4-2, with-out the need for additional ESD-protection components.The major difference between tests done using theHuman Body Model and IEC1000-4-2 is higher peakcurrent in IEC1000-4-2, because series resistance islower in the IEC1000-4-2 model. Hence, the ESD with-stand voltage measured to IEC1000-4-2 is generallylower than that measured using the Human BodyModel. Figure 7a shows the IEC1000-4-2 model andFigure 7b shows the current waveform for the 8kV,IEC1000-4-2, Level 4, ESD Contact-Discharge Method.The Air-Gap Method involves approaching the devicewith a charged probe. The Contact-Discharge Methodconnects the probe to the device before the probe isenergized.

Machine Model

The Machine Model for ESD tests all pins using a200pF storage capacitor and zero discharge resis-tance. Its objective is to emulate the stress caused bycontact that occurs with handling and assembly duringmanufacturing. Of course, all pins require this protec-tion during manufacturing, not just RS-232 inputs andoutputs. Therefore, after PC board assembly, theMachine Model is less relevant to I/O ports.

5V/div0FORCEON = FORCEOFFT1OUT2V/div05V/div0VCC = 3.3VC1–C4 = 0.1μF5μs/divT2OUTREADYFigure 8. Transmitter Outputs when Exiting Shutdown orPowering Up

__________Applications Information

Capacitor Selection

The capacitor type used for C1–C4 is not critical forproper operation; polarized or nonpolarized capacitors

Table 3. Required Minimum CapacitanceValuesVCC(V)3.0 to 3.63.15 to 3..5 to 5.53.0 to 5.5C1, CBYPASS(µF)0.220.10.0470.22C2, C3, C4(µF)0.220.10.331can be used. The charge pump requires 0.1µF capaci-tors for 3.3V operation. For other supply voltages, seeTable 3 for required capacitor values. Do not use val-ues smaller than those listed in Table 3. Increasing thecapacitor values (e.g., by a factor of 2) reduces rippleon the transmitter outputs and slightly reduces powerconsumption. C2, C3, and C4 can be increased withoutchanging C1’s value. However, do not increase C1without also increasing the values of C2, C3, C4,and CBYPASS, to maintain the proper ratios (C1 tothe 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 lowtemperatures, influences the amount of ripple on V+and V-.

Power-Supply Decoupling

In most circumstances, a 0.1µF VCCbypass capacitoris adequate. In applications that are sensitive to power-supply noise, use a capacitor of the same value ascharge-pump capacitor C1. Connect bypass capaci-tors as close to the IC as possible.

Transmitter Outputs when Exiting Shutdown

Figure 8 shows two transmitter outputs when exitingshutdown mode. As they become active, the two trans-mitter outputs are shown going to opposite RS-232 lev-els (one transmitter input is high, the other is low). Each

14______________________________________________________________________________________

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,transmitter is loaded with 3kΩin parallel with 1000pF.The transmitter outputs display no ringing or undesir-able transients as they come out of shutdown. Note thatthe transmitters are enabled only when the magnitudeT1IN5V/divof V- exceeds approximately -3V.

High Data Rates

The MAX3224E/MAX3226E/MAX3244E maintain the5V/divRS-232 ±5.0V minimum transmitter output voltage evenT1OUTat high data rates. Figure 9 shows a transmitter loop-back test circuit. Figure 10 shows a loopback test resultat 120kbps, and Figure 11 shows the same test at250kbps. For Figure 10, all transmitters were drivenR1OUT5V/divsimultaneously at 120kbps into RS-232 loads in parallelVCC = 3.3Vwith 1000pF. For Figure 11, a single transmitter was dri-2μs/divven at 250kbps, and all transmitters were loaded withan RS-232 receiver in parallel with 250pF.

Figure 10. MAX3224E/MAX3226E/MAX3244E Loopback TestThe MAX3225E/MAX3227E/MAX3245E maintain theResult at 120kbps

RS-232 ±5.0V minimum transmitter output voltage atdata rates up to 1Mbps (MegaBaud). Figure 12 showsa loopback test result with a single transmitter driven at1Mbps and all transmitters loaded with an RS-232T1IN5V/divreceiver in parallel with 250pF.

T1OUT5V/divVCCCBYPASSR1OUT5V/divVCC = 3.3VVCCC1+V+2μs/divC1 C1-MAX3224EC3*Figure 11. MAX3224E/MAX3226E/MAX3244E Loopback TestMAX3225EResult at 250kbps

C2+MAX3226EC2 MAX3227EV-C4C2-MAX3244EMAX3245ET_ INT_ OUTT1IN5V/divR_ OUTR_ INT1OUT5V/divFORCEON5kΩ1000pFVCCFORCEOFFGNDR1OUT5V/divVCC = 3.3V*C3 CAN BE RETURNED TO VCC OR GND.200ns/divFigure 9. Loopback Test Circuit

Figure 12. MAX3225E/MAX3227E/MAX3245E Loopback TestResult at 1Mbps

______________________________________________________________________________________

MAX3224E–MAX3227E/MAX3244E/MAX3245E†元器件交易网www.cecb2b.com±15kV ESD-Protected, 1µA, 1Mbps 3.0V to 5.5V,RS-232 Transceivers with AutoShutdown PlusMAX3224E–MAX3227E/MAX3244E/MAX3245E†+3.3V 0.1μF28C1+241 C20.1μF214C1-C2+C2-T1INT1OUT9+V 26VCCV+27C30.1μF 3C40.1μF C10.1μFCOMPUTER SERIAL PORTMAX3244EMAX3245EV-LOGICINPUTS13T2INT2OUT10+V12T3INT3OUT11-V20R2OUTBGND19R1OUT5kΩR1IN4Tx18LOGICOUTPUTS17R2OUT5kΩR3OUTR2IN5R3IN5kΩ6RS-232INPUTS16R4OUT5kΩR4IN715232221R5OUT5kΩR5IN8SERIALMOUSEFORCEONFORCEOFFINVALIDVCCTO POWER-MANAGEMENTUNITGND25Figure 13a. Mouse Driver Test Circuit16

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TRANSMITTER OUTPUT VOLTAGE (V)543210-1-2-3-4-5-60123456710LOAD CURRENT PER TRANSMITTER (mA)VOUT+VOUT+MAX2343E-FIG156Mouse Driveability

The MAX3244E/MAX3245E are specifically designed topower serial mice while operating from low-voltagepower supplies. They have been tested with leadingmouse brands from manufacturers such as Microsoftand Logitech. The MAX3244E/MAX3245E successfullydrove all serial mice tested and met their respectivecurrent and voltage requirements. The MAX3244E/MAX3245E dual charge pump ensures the transmitterssupply at least ±5V during worst-case conditions.Figure 13b shows the transmitter output voltages underincreasing load current. Figure 13a shows a typicalmouse connection.

MAX3224E–MAX3227E/MAX3244E/MAX3245EVCC = 3.0VVCCVOUT-VOUT-Interconnection with 3V and 5V Logic

The MAX3224E–MAX3227E/MAX3244E/MAX3245E candirectly interface with various 5V logic families, includ-ing ACT and HCT CMOS. See Table 4 for more informa-tion on possible combinations of interconnections.Table 5 lists other Maxim ESD-powered transceivers.

Figure 13b. MAX324_E Transmitter Output Voltage vs. LoadCurrent per TransmitterTable 4. Logic Family Compatibility with Various Supply VoltagesSYSTEM POWER-SUPPLYVOLTAGE(V)3.355VCCSUPPLYVOLTAGE(V)3.353.3COMPATIBILITYCompatible with all CMOS familiesCompatible with all TTL and CMOS familiesCompatible with ACT and HCT CMOS, and with AC, HC, or CD4000 CMOSTable 5. ±15kV ESD-Protected, 3.0V to 5.5V Powered RS-232 Transceivers from Maxim

PARTMAX3241EMAX3243EMAX3244EMAX3245EMAX3232EMAX3222ESUPPLYVOLTAGERANGE(V)+3.0 to +5.5+3.0 to +5.5+3.0 to +5.5+3.0 to +5.5+3.0 to +5.5+3.0 to +5.5NO. SUPPLYAuto-Auto-CURRENTOFShutdownShutdownTx/RxPlus(µA)3/53/53/53/52/22/2300111300300——YesYes———Yes————HumanBodyModel(kV)±15±15±15±15±15±15IEC 1000-4-2IEC 1000-4-2GUARANTEEDContactAir-GapDATA RATEDischargeDischarge(kbps)(kV)(kV)±8±8±8±8±8±8±15±15±15±15±15±152502502501Mbps250250MAX3223E+3.0 to +5.52/21—Yes±15±8±15250MAX3224E+3.0 to +5.52/21Yes—±15±8±15250MAX3225E+3.0 to +5.52/21Yes—±15±8±151MbpsMAX3221E+3.0 to +5.51/11—Yes±15±8±15250MAX3226E+3.0 to +5.51/11Yes—±15±8±15250MAX3227E+3.0 to +5.51/11Yes—±15±8±151Mbps______________________________________________________________________________________17

†元器件交易网www.cecb2b.com±15kV ESD-Protected, 1µA, 1Mbps 3.0V to 5.5V,RS-232 Transceivers with AutoShutdown PlusMAX3224E–MAX3227E/MAX3244E/MAX3245E†___________________________________________________Typical Operating Circuits

+3.3V+3.3VCBYPASS C10.1μF 0.1μF2C1+45 C20.1μF6C1-C2+C2-T1OUT13 15VCCV+3C30.1μF 7C40.1μF C10.1μFCBYPASS0.1μF28C1+241C20.1μF 2C1-C2+C2- 26VCCV+27C30.1μF MAX3226E*MAX3227EV- MAX3244E***MAX3245EV-3C40.1μF 11T1IN14T1IN13T2IN12T3INTO POWER-MANAGEMENTUNITVCC22FORCEOFF23FORCEON20R2OUTB19R1OUTT1OUT9T2OUT10T3OUT119R1OUTR1IN85kΩ1READYAUTOSHUTDOWNINVALID10PLUSFORCEOFF16GND14AUTOSHUTDOWNPLUSINVALID2112FORCEONR1IN4+3.3VCBYPASS C10.1μF 0.1μF2C1+4C1-5 C20.1μF6C2+C2-T1OUT17RS-232OUTPUTS 19VCCV+3C30.1μF 717R3OUTC40.1μF 16R4OUTR4IN7R3IN618R2OUTR2IN5 MAX3224E**MAX3225EV-13T1INTTL/CMOSINPUTS12T2INT2OUT815R5OUTGNDR5IN815R1OUTTTL/CMOSOUTPUTS10R2OUTR1IN165kΩR2IN95kΩTO POWER-MANAGEMENTUNITVCCRS-232INPUTS251READYAUTOSHUTDOWNINVALID11PLUSFORCEOFF20GND18*MAX3226E/MAX3227E PIN OUT REFERS TO SSOP/TSSOP PACKAGES.**MAX3224E/MAX3225E PIN OUT REFERS TO DIP/ SSOP/TSSOP PACKAGES.***MAX3244E/MAX3245E PIN OUT REFERS TO SO/SSOP/TSSOP PACKAGES.14FORCEON18______________________________________________________________________________________元器件交易网www.cecb2b.com±15kV ESD-Protected, 1µA, 1Mbps 3.0V to 5.5VRS-232 Transceivers with AutoShutdown Plus

,___________________________________________________________Pin Configurations

READY116FORCEOFFREADY120FORCEOFFC2+128C1+C1+215VCCC1+219VCCC2-227V+V+314GNDV+318GNDV-326VCCC1-4MAX3226E13T1OUTC1-MAX3227E417T1OUTR1IN425GNDC2+512FORCEONC2+5MAX3224EMAX3225E16R1INR2IN5C1-C2-611T1INC2-615R1OUTR3IN6MAX3244E24MAX3245E23FORCEONV-710INVALIDV-714FORCEONR4IN722FORCEOFFR1INR1OUTT2OUT813T1INR5IN821INVALIDSSOP/TSSOPR2IN912T2INT1OUT920R2OUTBR2OUT1011INVALIDT2OUT1019R1OUTT3OUTN1118R2OUTOTOP VIEWTTEDIP/SSOP/TSSOPUNUCT3IN1217R3OUTOIORN111OITRR1FTT2IN1316R4OUT1514131211T1IN1415R5OUTGND1610T2INSO/SSOP/TSSOPVCC179INVALIDFORCEOFF18MAX3224E8R2OUTTOP VIEW.C-+.+C.-22C.1CNC+CC..NVCVVNREADY19MAX3225E7R2IN363534333231302928V+20EXPOSED PADDLE6T2OUTR1IN127GND12345R2IN226C1-R3IN325FORCEON+-+--1122VCCCCR4IN424FORCEOFFTQFNR5IN5MAX3245E23INVALIDNN.C.622N.C.OTOP VIEWTEUCT1OUT721R2OUTBCDORCNVG1OT2OUT820R1OUTTFEXPOSED PADDLE1211109T3OUT919R2OUT101112131415161718.NNN.T.FORCEOFF138T1INCIIICTTC.321.UUU.NTTTNOOO543NRRRREADY147INVALIDTQFNV+15MAX3226EMAX3227E6R1OUTC1+16EXPOSED PADDLE5R1IN1234---1+2VC2CCTQFN______________________________________________________________________________________

PART MAX3225ECUPMAX3225ECTPMAX3225ECAPMAX3225ECPPMAX3225EETPMAX3225EEUPMAX3225EEAPMAX3225EEPPMAX3225EAAPMAX3226ECTEMAX3226ECUEMAX3226ECAEMAX3226EEAEMAX3226EETEMAX3226EEUEMAX3226EAAEMAX3227ECAEMAX3227ECTEMAX3227ECUEMAX3227EEAERANGE 0°C to +70°C0°C to +70°C0°C to +70°C0°C to +70°C-40°C to +85°C-40°C to +85°C-40°C to +85°C-40°C to +85°C-40°C to +125°C0°C to +70°C0°C to +70°C0°C to +70°C-40°C to +85°C-40°C to +85°C-40°C to +85°C-40°C to +125°C0°C to +70°C0°C to +70°C0°C to +70°C-40°C to +85°CTEMP INP KGP20 TSSOP20 TQFN-EP*20 SSOP20 PlasticDIP20 TQFN -EP*20 TSSOP20 SSOP20 PlasticDIP20 SSOP16 TQFN-EP*16 TSSOP16 SSOP16 SSOP16 TQFN-EP*16 TSSOP16 SSOP16 SSOP16 TQFN-EP*16TSSOP16 SSOP KGP ODEC—T2055-5——T2055-5————T1655-2———T1655-2———T1655-2——PART MAX3227EETEMAX3227EEUEMAX3227EAAEMAX3244ECWIMAX3244ECAIMAX3244ECUIMAX3244EEWIMAX3244EEAIMAX3244EEUIMAX3245ECWIMAX3245ECAIMAX3245ECTXMAX3245EEAIMAX3245EEWIMAX3245EEUIMAX3245EETXRANGE -40°C to +85°C-40°C to +85°C-40°C to +125°C0°C to +70°C0°C to +70°C0°C to +70°C-40°C to +85°C-40°C to +85°C-40°C to +85°C0°C to +70°C0°C to +70°C0°C to +70°C-40°C to +85°C-40°C to +85°C-40°C to +85°C-40°C to +85°CTEMP INP KGP16 TQFN-EP*16TSSOP16 SSOP28 WideSO28 SSOP28TSSOP28 WideSO28 SSOP28TSSOP28 WideSO28 SSOP36 TQ FN - E P* 28 SSOP28 WIDESO28TSSOP36 TQ FN - E P* KGP ODECT1655-2—————————T3666-3———T3666-3*EP = Exposed paddle.

___________________Chip Information

MAX3224ETRANSISTOR COUNT: 1129

MAX3225ETRANSISTOR COUNT: 1129MAX3226ETRANSISTOR COUNT: 1129MAX3227ETRANSISTOR COUNT: 1129

MAX3244E/MAX3245ETRANSISTOR COUNT: 1335

PROCESS: BICMOS

20______________________________________________________________________________________

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,Package Information

(The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information,go to www.maxim-ic.com/packages.)

SPE.NIHT NFQ______________________________________________________________________________________21

(The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information,go to www.maxim-ic.com/packages.)

TSSOP4.40mm.EPSPACKAGE OUTLINE, TSSOP 4.40mm BODY21-0066I1122______________________________________________________________________________________

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,Package Information

(The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information,go to www.maxim-ic.com/packages.)

SPE21.POSSINCHESMILLIMETERSDIMMINMAXMINMAXINCHESMILLIMETERSA0.0680.0781.731.99MINMAXMINMAXNA10.0020.0080.050.21D0.2390.2496.076.3314LB0.0100.0150.250.38D0.2390.2496.076.3316LC0.0040.0080.090.20D0.2780.27.077.3320LEHDSEE VARIATIONSD0.3170.3288.078.3324LE0.2050.2125.205.38D0.3970.40710.0710.3328Le0.0256 BSC0.65 BSCH0.3010.3117.657.90L0.0250.0370.630.950∞8∞0∞8∞NACBeA1LDNOTES:1. D&E DO NOT INCLUDE MOLD FLASH.2. MOLD FLASH OR PROTRUSIONS NOT TO EXCEED .15 MM (.006\").3. CONTROLLING DIMENSION: MILLIMETERS.PROPRIETARY INFORMATIONTITLE:4. MEETS JEDEC MO150.PACKAGE OUTLINE, SSOP, 5.3 MM5. LEADS TO BE COPLANAR WITHIN 0.10 MM.APPROVALDOCUMENT CONTROL NO.REV.21-0056C11SPE.INCHESMILLIMETERSWCINDIMMINMAXMINMAXOSA0.0930.1042.352.65A10.0040.0120.100.30B0.0140.0190.350.49C0.0090.0130.230.32EHe0.0501.27E0.2910.2997.407.60H0.3940.41910.0010.65L0.0160.0500.401.271VARIATIONS:INCHESMILLIMETERSTOP VIEWDIMMINMAXMINMAXNMS013D0.3980.41310.1010.5016AAD0.4470.46311.3511.7518ABD0.4960.51212.6013.0020ACD0.5980.61415.2015.6024ADDD0.6970.71317.7018.1028AEACeBA10∞-8∞FRONT VIEWLSIDE VIEWPROPRIETARY INFORMATIONTITLE:PACKAGE OUTLINE, .300\" SOICAPPROVALDOCUMENT CONTROL NO.REV.21-0042B11______________________________________________________________________________________23MAX3224E–MAX3227E/MAX3244E/MAX3245E†元器件交易网www.cecb2b.com±15kV ESD-Protected, 1µA, 1Mbps 3.0V to 5.5V,RS-232 Transceivers with AutoShutdown Plus5E†Package Information (continued)(The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information,go to www.maxim-ic.com/packages.)423XAM/E4423XAM/E7223XAM–E4223XAM24SPE.NPIDP______________________________________________________________________________________

元器件交易网www.cecb2b.com±15kV ESD-Protected, 1µA, 1Mbps 3.0V to 5.5VRS-232 Transceivers with AutoShutdown Plus

,Package Information (continued)(The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information,go to www.maxim-ic.com/packages.)

SPE.NIHT NFQ______________________________________________________________________________________

MAX3224E–MAX3227E/MAX3244E/MAX3245E†元器件交易网www.cecb2b.com±15kV ESD-Protected, 1µA, 1Mbps 3.0V to 5.5V,RS-232 Transceivers with AutoShutdown PlusMAX3224E–MAX3227E/MAX3244E/MAX3245E†Package Information (continued)(The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information,go to www.maxim-ic.com/packages.)

Revision HistoryPages changed at Rev 4: 1, 12, 20, 25, 26

Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses areimplied. Maxim reserves the right to change the circuitry and specifications without notice at any time.

is a registered trademark of Maxim Integrated Products, Inc.

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