19-0273; Rev 7; 1/07
3.0V至5.5V、低功耗、1Mbps、真RS-232收发器，使用四只0.1μF外部电容MAX3222/MAX3232/MAX3237/MAX3241___________________________________概述MAX3222/MAX3232/MAX3237/MAX3241收发器采用专有的低压差发送器输出级，利用双电荷泵在3.0V至5.5V电源供电时能够实现真正的RS-232性能。器件仅需四个0.1μF的外部小尺寸电荷泵电容。MAX3222、MAX3232和MAX3241确保在120kbps数据速率下维持RS-232输出电平。MAX3237在正常工作模式下可确保250kbps的数据速率，MegaBaudTM工作模式下保证1Mbps的速率，同时保持RS-232输出电平。MAX3222/MAX3232具有2路接收器和2路驱动器。MAX3222提供1μA关断模式，有效降低功耗并延长便携式产品的电池使用寿命。关断模式下，接收器保持有效状态，对外部设备(例如调制解调器)进行监测，仅消耗1μA电源电流。MAX3222和MAX3232的引脚、封装和功能分别与工业标准的MAX242和MAX232兼容。MAX3241提供一个完整串口(3路驱动器/5路接收器)，设计用于笔记本电脑和亚笔记本电脑。MAX3237(5路驱动器/3路接收器)可理想用于高速调制解调器。这两款器件都具有关断模式，关断时所有接收器保持有效状态，仅消耗1μA电源电流。接收器R1(MAX3237/MAX3241)和R2(MAX3241)除标准输出外还提供附加输出。这些附加输出始终保持有效，可以对调制解调器等外部设备进行监测，电路(可能已完全撤除VCC电源)中无需正向偏置保护二极管。MAX3222、MAX3232以及MAX3241采用节省空间的TSSOP和SSOP封装。_________________________下一代器件特性?更小封装的器件：MAX3228E/MAX3229E：+2.5V至+5.5V、RS-232收发器，采用UCSPTM封装?集成ESD保护的器件：MAX3222E/MAX3232E/MAX3237E/MAX3241E/MAX3246E：±15kV ESD保护、电流低至10nA、3.0V至5.5V供电、速率高达1Mbps的真RS-232收发器?低电压或数据电缆传输应用：MAX3380E/MAX3381E：+2.35V至+5.5V、1μA、2Tx/2Rx RS-232收发器，带有±15kV ESD保护的I/O和逻辑引脚_______________________________定购信息PARTMAX3222CUP+MAX3222CAP+MAX3222CWN+MAX3222CPN+TEMP RANGE0°C to +70°C0°C to +70°C0°C to +70°C0°C to +70°CPIN-PACKAGE20 TSSOP20 SSOP18 SO18 Plastic DipPKGCODEU20+2A20+1W18+1P18+5+表示无铅封装。定购信息(续)在数据资料的最后给出。___________________________________应用_______________________________引脚配置笔记本电脑、亚笔记本电脑与掌上电脑TOP VIEW高速调制解调器+EN118SHDN电池供电设备C1+217VCC手持式装置V+316GND外设C1-4MAX322215T1OUT打印机C2+5MAX322214R1INC2-613R1OUTV-712T1INT2OUT811T2INR2IN910R2OUTDIP/SO引脚配置(续)在数据资料的最后给出。典型工作电路在数据资料的最后给出。MegaBaud和UCSP是Maxim Integrated Products, Inc.的商标。________________________________________________________________Maxim Integrated Products
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3.0V至5.5V、低功耗、1Mbps、真RS-232收发器，使用四只0.1μF外部电容MAX3222/MAX3232/MAX3237/MAX3241ABSOLUTE MAXIMUM RATINGS
VCC...........................................................................-0.3V to +6VV+ (Note 1)...............................................................-0.3V to +7VV- (Note 1)................................................................+0.3V to -7VV+ + V- (Note 1)...................................................................+13VInput Voltages
T_IN, SHDN, EN...................................................-0.3V to +6VMBAUD...................................................-0.3V to (VCC+ 0.3V)R_IN.................................................................................±25VOutput Voltages
T_OUT...........................................................................±13.2VR_OUT....................................................-0.3V to (VCC+ 0.3V)Short-Circuit Duration
T_OUT....................................................................Continuous
Continuous Power Dissipation (TA= +70°C)
16-Pin TSSOP (derate 6.7mW/°C above +70°C).............533mW16-Pin Narrow SO (derate 8.70mW/°C above +70°C)....696mW16-Pin Wide SO (derate 9.52mW/°C above +70°C)........762mW16-Pin Plastic DIP (derate 10.53mW/°C above +70°C)...842mW18-Pin SO (derate 9.52mW/°C above +70°C)..............762mW18-Pin Plastic DIP (derate 11.11mW/°C above +70°C)..889mW20-Pin SSOP (derate 7.00mW/°C above +70°C).........559mW20-Pin TSSOP (derate 8.0mW/°C above +70°C).............640mW28-Pin TSSOP (derate 8.7mW/°C above +70°C).............696mW28-Pin SSOP (derate 9.52mW/°C above +70°C).........762mW28-Pin SO (derate 12.50mW/°C above +70°C).....................1WOperating Temperature Ranges
MAX32_ _C_ _.....................................................0°C to +70°CMAX32_ _E_ _ .................................................-40°C to +85°CStorage Temperature Range.............................-65°C to +150°CLead Temperature (soldering, 10s).................................+300°C
Note 1:V+ and V- can have a maximum magnitude 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= +3.0V to +5.5V, C1–C4 = 0.1μF (Note 2), TA= TMINto TMAX, unless otherwise noted. Typical values are at TA= +25°C.)
PARAMETERDC CHARACTERISTICS VCCPower-Supply CurrentShutdown Supply CurrentInput Logic Threshold Low(Note 3)Input Logic Threshold High(Note 3)Input Leakage CurrentOutput Leakage CurrentOutput Voltage LowOutput Voltage HighRECEIVER INPUTS Input Voltage RangeInput Threshold LowInput Threshold HighTA= +25°CTA= +25°CVCC= 5.0VVCC= 3.3VVCC= 5.0VVCC= 3.3VVCC= 5.0V-250.60.81.21.51.51.82.42.425VVVNo load, VCC= 3.3V or 5.0V,TA= +25°CSHDN= GND, TA= +25°CMAX3222/MAX3232/MAX3241MAX32370.30.51.01.02.010μAmACONDITIONSMINTYPMAXUNITSLOGIC INPUTS AND RECEIVER OUTPUTS T_IN, EN, SHDN, MBAUDVCC= 3.3VVCC= 5.0VT_IN, EN, SHDN, MBAUDReceivers disabledIOUT= 1.6mAIOUT= -1.0mAVCC- 0.6VCC- 0.12.02.4±0.01±0.05±1.0±100.40.8VVμAμAVV2_______________________________________________________________________________________
3.0V至5.5V、低功耗、1Mbps、真RS-232收发器，使用四只0.1μF外部电容ELECTRICAL CHARACTERISTICS (continued)
(VCC= +3.0V to +5.5V, C1–C4 = 0.1μF (Note 2), TA= TMINto TMAX, unless otherwise noted. Typical values are at TA= +25°C.)
PARAMETERInput HysteresisInput ResistanceTRANSMITTER OUTPUTS Output Voltage SwingOutput ResistanceOutput Short-Circuit CurrentOutput Leakage CurrentVOUT= ±12V, VCC= 0V or 3V to 5.5V, transmitters disabledAll transmitter outputs loaded with 3k?to groundVCC= V+ = V- = 0V, VOUT= ±2V±5.0300±5.410M±35±60±25V?mAμATA= +25°C3CONDITIONSMINTYP0.357MAXUNITSVk?MAX3222/MAX3232/MAX3237/MAX3241MOUSE DRIVEABILITY (MAX3241)Transmitter Output VoltageT1IN = T2IN = GND, T3IN = VCC,T3OUT loaded with 3k?to GND,T1OUT and T2OUT loaded with 2.5mA each±5.0VTIMING CHARACTERISTICS—MAX3222/MAX3232/MAX3241
(VCC= +3.0V to +5.5V, C1–C4 = 0.1μF (Note 2), TA= TMINto TMAX, unless otherwise noted. Typical values are at TA= +25°C.)
PARAMETERMaximum Data RateReceiver Propagation DelayReceiver Output Enable TimeTransmitter SkewCONDITIONSRL= 3k?, CL= 1000pF, one transmitter switchingR_IN to R_OUT, CL= 150pFNormal operationtPHLtPLHMIN120TYP2350.30.3200200300MAXUNITSkbpsμsnsnsnsReceiver Output Disable TimeNormal operation|tPHL- tPLH|Receiver Skew|tPHL- tPLH|300nsVCC= 3.3V, RL= 3k?to 7k?, CL= 150pF toTransition-Region Slew Rate+3V to -3V or -3V to +3V,1000pF630TA= +25°C, one transmitterswitchingCV/μsL= 150pF to2500pF430_______________________________________________________________________________________3
3.0V至5.5V、低功耗、1Mbps、真RS-232收发器，使用四只0.1μF外部电容MAX3222/MAX3232/MAX3237/MAX3241TIMING CHARACTERISTICS—MAX3237
(VCC= +3.0V to +5.5V, C1–C4 = 0.1μF (Note 2), TA= TMINto TMAX, unless otherwise noted. Typical values are at TA= +25°C.)
PARAMETERCONDITIONSRL= 3k?, CL= 1000pF, one transmitter switching,MBAUD = GNDMaximum Data RateVCC= 3.0V to 4.5V, RL= 3k?, CL= 250pF,one transmitter switching, MBAUD = VCCVCC= 4.5V to 5.5V, RL= 3k?, CL= 1000pF,one transmitter switching, MBAUD = VCCReceiver Propagation DelayReceiver Output Enable TimeR_IN to R_OUT, CL= 150pFNormal operationtPHLtPLHMIN250100010000.150.152002001002550CL= 150pFto 1000pFMBAUD =GNDMBAUD =VCC62443015030V/μsμsnsnsnsnsnskbpsTYPMAXUNITSReceiver Output Disable TimeNormal operationTransmitter SkewReceiver Skew|tPHL- tPLH|, MBAUD = GND|tPHL- tPLH|, MBAUD = VCC|tPHL- tPLH|Transition-Region Slew RateVCC= 3.3V, RL= 3?to 7k?,+3V to -3V or -3V to +3V,TA= +25°CCL= 150pF to 2500pF,MBAUD = GNDNote 2:MAX3222/MAX3232/MAX3241: C1–C4 = 0.1μF tested at 3.3V ±10%; C1 = 0.047μF, C2–C4 = 0.33μF tested at 5.0V ±10%.
MAX3237: C1–C4 = 0.1μF tested at 3.3V ±5%; C1–C4 = 0.22μF tested at 3.3V ±10%; C1 = 0.047μF, C2–C4 = 0.33μF testedat 5.0V ±10%.
Note 3:Transmitter input hysteresis is typically 250mV.
_________________________________________________________________________典型工作特性(VCC= +3.3V, 235kbps data rate, 0.1μF capacitors, all transmitters loaded with 3k?, TA= +25°C, unless otherwise noted.)
MAX3222/MAX3232TRANSMITTER OUTPUT VOLTAGEvs. LOAD CAPACITANCEMAX3222-01MAX3222/MAX3232
SLEW RATE
vs. LOAD CAPACITANCE
2024SLEW RATE (V/μs)1614121086420
5000150
1000
2000
3000
4000
5000
+SLEW-SLEWFOR DATA RATES UP TO 235kbpsMAX3222-02MAX3222/MAX3232
SUPPLY CURRENT vs. LOAD CAPACITANCE
WHEN TRANSMITTING DATA
35SUPPLY CURRENT (mA)3025
120kbps2015
20kbps1050
0
1000
2000
3000
4000
5000
MAX3222-03TRANSMITTER OUTPUT VOLTAGE (V)6543210-1-2-3-4-5-601000200030002240
235kbpsVOUT+VOUT-4000LOAD CAPACITANCE (pF)LOAD CAPACITANCE (pF)LOAD CAPACITANCE (pF)
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3.0V至5.5V、低功耗、1Mbps、真RS-232收发器，使用四只0.1μF外部电容____________________________________________________________________典型工作特性(续)(VCC= +3.3V, 235kbps data rate, 0.1μF capacitors, all transmitters loaded with 3k?, TA= +25°C, unless otherwise noted.)
MAX3241
TRANSMITTER OUTPUT VOLTAGE
vs. LOAD CAPACITANCE
MAX3222-04MAX3222/MAX3232/MAX3237/MAX3241MAX3241SLEW RATE
vs. LOAD CAPACITANCE
MAX3222-05MAX3241
SUPPLY CURRENT vs. LOAD
CAPACITANCE WHEN TRANSMITTING DATA
40SUPPLY CURRENT (mA)35302520151050
5000
0
1000
2000
3000
4000
5000
LOAD CAPACITANCE (pF)
20kbps120kbps235kbpsMAX3222-067.5TRANSMITTER OUTPUT VOLTAGE (V)VOUT+5.02.50-2.5-5.0-7.5
0
1000
2000
3000
4000VOUT-242220SLEW RATE (V/μs)1816141210864
+SLEWALL OUTPUTS LOADED WITH 3k? +CL 0.1μF CHARGE-PUMP CAPACITORSFOR ALL DATA RATES UP TO 235kbps0
1000
2000
3000
4000
LOAD CAPACITANCE (pF)
45
1 TRANSMITTER AT 235kbps2 TRANSMITTERS AT 30kbps-SLEW5000
LOAD CAPACITANCE (pF)
MAX3237
TRANSMITTER OUTPUT VOLTAGEvs. LOAD CAPACITANCE (MBAUD = GND)
MAX3222-07MAX3237
TRANSMITTER OUTPUT VOLTAGEvs. LOAD CAPACITANCE (MBAUD = VCC)
RANSMITTER OUTPUT VOLTAGE (V)1Mbps5.02.50-2.5-5.02Mbps1.5Mbps22Mbps1.5MbpsMAX3222-08MAX3237
SLEW RATE vs. LOAD CAPACITANCE
(MBAUD = GND)
MAX3222-097.5RANSMITTER OUTPUT VOLTAGE (V)5.02.50-2.5-5.07.51210SLEW RATE (V/μs)864
1 TRANSMITTER AT 240kbps4 TRANSMITTERS AT 15kbps3k? + CL LOADS+SLEW-SLEW1 TRANSMITTER AT 240kbps4 TRANSMITTERS AT 15kbps3k? + CL LOADSVCC = 3.3V1 TRANSMITTER AT FULL DATA RATE4 TRANSMITTERS AT 1/16 DATA RATE3k? + CL LOAD, EACH OUTPUTVCC = 3.3VTT1MbpsVCC = 3.3V-7.5
-7.5
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50000
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LOAD CAPACITANCE (pF)LOAD CAPACITANCE (pF)
LOAD CAPACITANCE (pF)
MAX3237
MAX3237
MAX3237
SLEW RATE vs. LOAD CAPACITANCE
SUPPLY CURRENT vs.
SKEW vs. LOAD CAPACITANCE
(MBAUD = VCC)
LOAD CAPACITANCE (MBAUD = GND)
(tPLH - tPHL)
7006011170
2--221-2222)33XX1 TRANSMITTER AT 512kbps2s22AAMM60n4 TRANSMITTERS AT 32kbps3X60(A M-SLEW, 1Mbps50W)240kbpsAE3k? + CK)s50+SLEW, 1Mbpsm(50SV = 3.3VL LOADSμ MBAUD = VCCCC/T40120kbpsV-SLEW, 2MbpsN( EE+SLEW, 2MbpsRT4040
MAXARRU30
CAVERAGE; 10 PARTSW30 Y20kbps30ELLPSP2024U1 TRANSMITTER AT FULL DATA RATES1 TRANSMITTER AT FULL DATA RATE20104 TRANSMITTERS AT 1/16 DATA RATE3k? + C104 TRANSMITTERS AT 1/16 DATA RATEL LOAD EACH OUTPUT3k? + CL LOADS10VMINCC = 3.3V0VCC = 3.3V0
0
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LOAD CAPACITANCE (pF)
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MAX3232中文资料 pdf - 图文
