ST75185CTR中文资料
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1/18December 2002sMEETS AND EXCEEDS THEREQUIREMENTS OF EIA/TIA-232-E AND ITUV.28STANDARDsSINGLE CHIP WITH EASY INTERFACE BETWEEN UART AND SERIAL PORT CONNECTOR OF IBM PC/AT TM AND COMPATIBLESsDESIGNED TO SUPPORT DATA RATES UP TO 120KbpssPINOUT COMPATIBLE WITH ST75C185DESCRIPTIONThe ST75185contains three drivers and five receivers.The pinout matches the DB9S connector design in order to decrease the part count,reduce the board space required and allow easy interconnection of the UART and serial port connector of IBM PC/AT TM and compatibles.The bipolar circuits and processing of the ST75185provides a rugged low-cost solution for this function at the expense of quiescent power and external passive components relative to the ST75C185.The ST75185complies with the requirements of the EIA/TIA 232-E and ITU (formally CCITT)v.28standards.These standards are for data interchange between a host computer and peripheral at signalling rates up to 20k-bits/s.The switching speeds of the ST75185are fast enough to support rates up to 120K-bits/s with lower capacitive loads (shorter cables).Interoperability at the higher signalling rates cannot be assured unless the designer has design control of the cable and the interface circuits at the both ends.For interoperability at signalling rates to 120K-bits/s,use of EIA/ITA-423-B (ITU v.10)and EIA/ITA-422-B (ITU v.11)standards are recommended.The ST75185is characterized for operation over the range of 0°C to 70°C.ORDERING CODESType Temperature Range PackageCommentsST75185CTR 0to 70°C TSSOP20(Tape &Reel)2500parts per reelST75185CD 0to 70°C SO-20(Tube)40parts per tube /25tubes per boxST75185CDR 0to 70°C SO-20(Tape &Reel)1000parts per reel ST75185CPR0to 70°CSSOP-20(Tape &Reel)1350parts per reelST75185MULTIPLE RS-232DRIVERS AND RECEIVERSST751852/18PIN CONNECTION IEC LOGIC SYMBOL AND LOGIC DIAGRAMPIN DESCRIPTIONPlN N°SYMBOL NAME AND FUNCTION1V DD Supply Voltage (+12V)2RA1First Receiver Input 3RA2Second Receiver Input 4RA3Third Receiver Input 5DY1First Driver Output 6DY2Second Driver Output 7RA4Fourth Receiver Input 8DY3Third Driver Output 9RA5Fifth Receiver Input 10V SS Supply Voltage (-12V)11GND Ground12RY5Fifth Receiver Ouput 13DA3Third Driver Intput14RY4Fourth Receiver Ouput 15DA2Second Driver Input 16DA1First Driver Input17RY3Third Receiver Ouput 18RY2Second Receiver Output 19RY1First Receiver Output 20V CCSupply Voltage(+5V)ST751853/18ABSOLUTE MAXIMUM RATINGS OVER OPERATING FREE-AIR TEMPERATURE RANGEAbsolute Maximum Ratings are those values beyond which damage to the device may occur.Functional operation under these condition is not implied.NOTE 1:All voltage are with respect to the network ground terminal.DISSIPATION RATING TABLE(*)This is the reverse of the traditional junction-case thermal resistance R tJ-CRECOMMENDED OPERATING CONDITIONSSymbol ParameterValue Unit V DD Supply Voltage (Note 1)15V V SS Supply Voltage (Note 1)-15V V CC Supply Voltage (Note 1)10V V I Input Voltage Range (DRIVER)-15to 7V V I Input Voltage Range (RECEIVER)-30to 30V V O Output Voltage Range (DRIVER)-15to 15V I O Receiver Low Level Output Current 20mAP D Continuous Total Power Dissipation See dissipation Rating TableT A Operating Free-Air Tempereature Range 0to 70°C T stg Storage Temperature Range-65to +150°C T LLead Temperature 1.6mm from case for 10sec260°C Package Power Rating at T A ≤25°C Derating Factor above T A =25°C (*)Power Rating at T A ≤70°C MICROPACKAGE (D)1125mW9.0mW/°C720mWSymbol ParameterMin Max Unit V DD Supply Voltage 7.515V V SS Supply Voltage -7.5-15V V CC Supply Voltage 4.5 5.5V V I Driver Input Voltage 0V CC V I OH High Level Output Current DRIVER -6mA RECEIVER -0.5I OL Low Level Output CurrentDRIVER 6mA RECEIVER16T AOperating Free-Air Tempereature Range70°CST751854/18SUPPLY CURRENTSDRIVER ELECTRICAL CHARACTERISTICS OVER OPERATING FREE-AIR TEMPERATURE RANGE (V DD =9V,V SS =-9V,V CC =5V,unless otherwise specified)NOTE 3:The algebraic convention,where the more positive (less negative)limits designated as maximum,is used in this datasheet for logic levels only (e.g.if -10V is a maximum,the typical value is a more negative voltage).NOTE 4:Output short circuit conditions must maintain the total power dissipation below absolute maximum ratings.NOTE 5:Test conditions are those specified by EIA-232-E and as listed above.Symbol ParameterTest ConditionsValue Unit V DDV SSMin.Typ.Max.I DDSupply Current from V DD9-9No load.All inputs at 1.9V15mA12-121915-15259-9No load.All inputs at 0.8V4.5mA12-125.515-159I SS Supply Current from V SS9-9No load.All inputs at 1.9V-15mA12-12-1915-15-259-9No load.All inputs at 0.8V-3.2mA12-12-3.215-15-3.2I CC Supply Current from V CCNo load.All inputs at 5VV CC =5V30mASymbol ParameterTest ConditionsValueUnit Min.Typ.Max.V OH High Level Output Voltage V IL =0.8V R L =3K Ω(See Figure 1)67.5V V OL Low Level Output Voltage (Note 3)V IH =1.9V R L =3K Ω(See Figure 1)-7.5-6V I IH High Level Input Current V I =5V (See Figure 2)10µA I IL Low Level Input Current V I =0V (See Figure 2)−1.6mA I OS(H)High Level Short Circuit Output Current (Note 4)V IL =0.8V V O =0V (See Figure 1)-4.5−12−19.5mA I OS(L)Low Level Short Circuit Output Current V IH =2VV O =0V (See Figure 1)4.51219.5mA R OOutput ResistanceV DD =V SS =V CC =0V V O =-2to 2V (Note 5)300ΩST751855/18DRIVER SWITCHING CHARACTERISTICS (V DD =12V,V SS =-12V,V CC =5V,T A =25°C)NOTE 6:Measured between -3V and 3V points of output waveform (EIA-232-E conditions),all unused inputs are tied.RECEIVER ELECTRICAL CHARACTERISTICS OVER OPERATING CONDITIONSAll typical values are at TA =25°C,VCC =5V,VDD =9V and VSS=-9VRECEIVER SWITCHING CHARACTERISTICS (V DD =12V,V SS =-12V,V CC =5V T A =25°C)Symbol ParameterTest ConditionsValueUnit Min.Typ.Max.t PLH Propagation Delay Time,Low to High Level Output R L =3to 7K ΩC L =15pF (See Figure 3,4)315500ns t PHL Propagation Delay Time,High to Low Level Output R L =3to 7K ΩC L =15pF (See Figure 3,4)75175ns t TLHTransition Time Low to High Level Output R L =3to 7K ΩC L =15pF (See Figure 3,4)60100ns R L =3to 7K ΩC L =2500pF (Note 6,See Figure 3,4)1.72.5µs t THLTransition Time High to Low Level Output R L =3to 7K ΩC L =15pF (See Figure 3,4)407.5ns R L =3to 7K ΩC L =2500pF (Note 6,See Figure 3,4)1.52.5µsSymbol ParameterTest ConditionsValueUnit Min.Typ.Max.V T+Positive Going Threshold Voltage (See Figure 6)2.2 2.4V V T-Negative Going Threshold Voltage T A =25°C (See Figure 6)0.750.97V V hys Input Hysteresis (V T +-V T -)0.5V V OH High Level Output Voltage I OH =-0.5mA V IH =0.75V 2.645VInputs Open 2.6V OL Low Level Output Voltage V I =3V I OL =10mA 0.20.45V I IH High Level Input Current V I =25V (See Figure 6) 3.68.3mAV I =3V (See Figure 6)0.43I IL Low Level Input Current V I =-25V (See Figure 6)-3.6-8.3mAV I =-3V(See Figure 6)-0.43I OSShort-Circuit Output CurrentV I =0V V O =0V (See Figure 5)-3.4-12mASymbol ParameterTest ConditionsValueUnit Min.Typ.Max.t PLH Propagation Delay Time Low to High Level Output R L =5K ΩC L =50pF (See Figure 6)4001000ns t PHL Propagation Delay Time High to Low Level Output R L =5K ΩC L =50pF (See Figure 6)70150ns t TLH Transition Time Low to High Level Output R L =5K ΩC L =50pF (See Figure 6)200525ns t THLTransition Time High to Low Level Output R L =5K ΩC L =50pF(See Figure 6)2060nsST751856/18APPLICATION CIRCUITSFigure 1:Driver Test Circuit for V OH ,I SO(H)and ISO(L)ST751857/18Figure 2:Driver Test Circuit for I IH and I ILFigure 3:Driver Test CircuitFigure 4:Driver VoltageWaveformsST751858/18Figure 5:Receiver Test Circuit for I OSFigure 6:Receiver Test Circuit for V T ,V OH ,V OLFigure 7:Receiver TestCircuitST751859/18Figure 8:Receiver Voltage WaveformsNOTE A:The pulse generator has the following characteristics:t W =25µs,PRR =20KHz,Z O =50Ω,t r =t f <50ns NOTE B:C L includes probe and jig capacitance.Figure 9:Driver Voltage Transfer CharacteristicsFigure 10:Driver Short Circuit Output Current vs Free-Air Temperature Figure 11:Device Supply Current vs TemperatureFigure 12:Driver Output Current vs OutputVoltageST7518510/18Figure 13:Driver Output Slew Rate vs Load CapacitanceFigure 14:Receiver Threshold vs TemperatureFigure 15:Receiver Threshold vs SupplyVoltageAPPLICATION INFORMATION:DIODES ON POWER SUPPLYDiodes placed in series with the VDD and VSS leads protect the ST75185in the fault condition in which the devices output are shorted to±15V and the power supplies are at low state and providebelow).low-impedance path to ground(see Figure11/18Information furnished is believed to be accurate and reliable. However, STMicroelectronics assumes no responsibility for the consequences of use of such information nor for any infringement of patents or other rights of third parties which may result from its use. No license is granted by implication or otherwise under any patent or patent rights of STMicroelectronics. Specifications mentioned in this publication are subject to change without notice. This publication supersedes and replaces all information previously supplied. STMicroelectronics products are not authorized for use as critical components in life support devices or systems without express written approval of STMicroelectronics.© The ST logo is a registered trademark of STMicroelectronics© 2002 STMicroelectronics - Printed in Italy - All Rights ReservedSTMicroelectronics GROUP OF COMPANIESAustralia - Brazil - Canada - China - Finland - France - Germany - Hong Kong - India - Israel - Italy - Japan - Malaysia - Malta - Morocco Singapore - Spain - Sweden - Switzerland - United Kingdom - United States.© 18/18。
