【正文】 C存儲溫度范圍 ...。CMAX32__E__ ...............................................................................40176。C) .............................1W工作溫度范圍：MAX32__C__................................................................................0176。C) ..........................762mW28Pin SO (derate 176。C) ..........................696mW28Pin SSOP (derate 176。C) ..........................640mW28Pin TSSOP (derate 176。C) ..........................559mW20Pin TSSOP (derate 176。C) ................889mW20Pin SSOP (derate 176。C)...............................762mW18Pin Plastic DIP (derate 176。C)................842mW18Pin SO (derate 176。C) ....................762mW16Pin Plastic DIP (derate 176。C) ................696mW16Pin Wide SO (derate 176。C) ........................533mW16Pin Narrow SO (derate 176。C)：16Pin TSSOP (derate 176。25V輸出電壓：T_OUT.......................................................................................177。應用（1）筆記本電腦、亞筆記本電腦與掌上電腦（2）高速調(diào)制解調(diào)器（3）電池供電設備（4）手持式設備（5）外設（6）打印機下一代期間特征（1）低電源電流：300μA（MAX3222/MAX3232/MAX3241）為500μA（MAX3237）（2）保證數(shù)據(jù)傳輸率：120kbps（MAX3222/MAX3232/MAX3241）250kbps的（MAX3237正常操作）1Mbps的（MAX3237 MegaBaud操作）（3）1μA的低功耗接收器主動關閉（MAX3222/MAX3237/MAX3241）（4）流通式引腳（MAX3237）（5）符合規(guī)格的EIA/（6）保證鼠標驅動性（MAX3241）（7）引腳兼容工業(yè)標準MAX242（MAX3222）與工業(yè)標準的MAX232（MAX3232）引腳兼容（8）保證轉換率：6V/μs（MAX3222/MAX3232/MAX3237/MAX3241）24V/μs（MAX3237 MegaBaud操作）定購信息部分溫度范圍密碼封轉MAX3222CUP+0℃ to +70℃20 TSSOP U20+2MAX3222CAP+0℃ to +70℃20 SSOP A20+1MAX3222CWN+0℃ to +70℃18SO W18+1MAX3222CPN+0℃ to +70℃18 Plastic Dip p18+5注：+表示無鉛封裝。這些附加輸出始終保持有效，可以對調(diào)制解調(diào)器等外部設備進行檢測，電路（可能已完全撤出VCC電源）中無需正向偏執(zhí)報復二極管。這兩款器件都具有關斷模式，關斷時所有接收器保持有效狀態(tài)，僅消耗1UA電源電流。MAX3241提供一個完整串口（3路驅動器/5路接收器），設計用筆記本電腦和亞筆記本電腦。關斷模式下，接收器保持有效狀態(tài)，對外部設備(例如調(diào)制解調(diào)器)進行檢測，僅消耗1UA電源電流。MAX3222/MAX3232具有2路接收器和2路驅動器。MAX322MAX3232和MAX3241確保在120kps數(shù)據(jù)速率下維持RS232輸出電平。 minimum transmitter output voltage even at high data 2 shows a transmitter loopback test 3 shows a loopback test result at 120kbps,and Figure 4 shows the same test at Figure 3,all transmitters were driven simultaneously at 120kbps into RS232 loads in parallel with Figure 4,a single transmitter was driven at 235kbps,and all transmitters were loaded with an RS232 receiver in parallel with 1000pF.Figure 1. MAX3241 Transmitter Output Voltage vs. Load Current per TransmitterFigure 2. Loopback Test CircuitFigure 3. MAX3241 Loopback Test Result at 120kbpsFigure 4. MAX3241 Loopback Test Result at 235kbpsFigure 5. MAX3237 Loopback Test Result at 1000kbps(MBAUD = VCC)from：MAX3222/MAX3232/MAX3237/MAX324低功耗、1Mbps、真RS232收發(fā)器。polarized or nonpolarized capacitors can be charge pump requires capacitors for other supply voltages,refer to Table 2 for required capacitor not use values smaller than those listed in Table the capacitor values (., by a factor of 2) reduces ripple on the transmitter outputs and slightly reduces power ,C3,and C4 can be increased without changing C1’s ,do not increase C1 without also increasing the values of C2,C3,and C4,to maintain the proper ratios (C1 to the other capacitors).When using the minimum required capacitor values,make sure the capacitor value does not degrade excessively with in doubt,use capacitors with a larger nominal capacitor’s equivalent series resistance (ESR),which usually rises at low temperatures,influences the amount of ripple on V+ and V.Table 2. Required Minimum Capacitor ValuesVcc(V)C1(uf)C2,C3,C4(uF)MAX3222/MAX3232/MAX3241 to to to MAX3237 to to to to PowerSupply DecouplingIn most circumstances,a bypass capacitor is applications that are sensitive to powersupply noise,decouple VCC to ground with a capacitor of the same value as chargepump capacitor bypass capacitors as close to the IC as possible.Operation Down to Transmitter outputs will meet EIA/TIA562 levels of177。10% operation,the MAX3237 transmitters guarantee a 1Mbps data rate into worstcase loads of 3k? in parallel with1000pF.RS232 ReceiversThe receivers convert RS232 signals to CMOSlogic output MAX3222/MAX3237/MAX3241 receivers have inverting threestate shutdown, the receivers can be active or inactive (Table 1).Table 1. MAX3222/MAX3237/MAX3241 Shutdown and Enable Control Truth TableT_OUTR_OUTR_OUTB(MAX3237/MAX3241)00HighZActiveActive01HighZHighZActive10ActiveActiveActive11ActiveHighZActiveThe plementary outputs on the MAX3237 (R1OUTB)and the MAX3241 (R1OUTB, R2OUTB) are always active,regardless of the state of EN or allows for Ring Indicator applications without forward biasing other devices connected to the receiver is ideal for systems where VCC is set to 0V in shutdown to acmodate peripherals,such as UARTs.MAX3222/MAX3237/MAX3241 Shutdown ModeSupply current falls to less than 1181。if the output voltages are less than ,the charge pumps are enabled,and if the output voltages exceed ,the charge pumps are charge pump requires a flying capacitor (C1, C2) and a reservoir capacitor (C3, C4) to generate the V+ and V supplies.RS232 TransmittersThe transmitters are inverting level translators that convert CMOSlogic levels to EIA/TIA232 MAX3222/MAX3232/MAX3241 transmitters guarantee a 120kbps data rate with worstcase loads of 3k? in parallel with 1000pF,providing patibility with PCtoPC munication software (such as LapLink?).Typically, these three devices can operate at data rates of can be paralleled to drive multiple receivers or mice.The MAX3222/MAX3237/MAX3241’s output stage is turned off (high impedance) when the device is in shutdown mode. When the power is off, the MAX3222/ MAX3232/MAX3237/MAX3241 permit the outputs to be driven up to 177。CLeadTemperature(soldering,10s) ................................................+300176。CStorage Temperature Range .......................................................65176。CMAX32__E__ ...........................