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1、1.General descriptionThe 74HC245;74HCT245 is a high-speed Si-gate CMOS device and is pin compatiblewith Low-Power Schottky TTL(LSTTL).The 74HC245;74HCT245 is an octal transceiver featuring non-inverting 3-state buscompatible outputs in both send and receive directions.The 74HC245;74HCT245features an
2、 output enable input(OE)for easy cascading and a send/receive input(DIR)for direction control.OE controls the outputs so that the buses are effectively isolated.The 74HC245;74HCT245 is similar to the 74HC640;74HCT640 but has true(non-inverting)outputs.2.FeaturesI Octal bidirectional bus interfaceI N
3、on-inverting 3-state outputsI Multiple package optionsI Complies with JEDEC standard no.7AI ESD protection:N HBM EIA/JESD22-A114-B exceeds 2000 VN MM EIA/JESD22-A115-A exceeds 200 VI Specified from 40 C to+85 C and from 40 C to+125 C3.Quick reference data74HC245;74HCT245Octal bus tranceiver;3-stateR
4、ev.03 31 January 2005Product data sheetTable 1:Quick reference dataGND=0 V;Tamb=25C;tr=tf=6 ns.SymbolParameterConditionsMinTypMaxUnitType 74HC245tPHL,tPLHpropagation delayAn to Bn or Bn to AnCL=15 pF;VCC=5 V-7-nsCIinput capacitance-3.5-pFCI/Oinput/output capacitance-10-pFCPDpower dissipationcapacita
5、nce pertransceiverVI=GND to VCC1-30-pFType 74HCT245tPHL,tPLHpropagation delayAn to Bn or Bn to AnCL=15 pF;VCC=5 V-10-ns9397 750 14502 Koninklijke Philips Electronics N.V.2005.All rights reserved.Product data sheetRev.03 31 January 20052 of 22Philips Semiconductors74HC245;74HCT245Octal bus tranceiver
6、;3-state1CPDis used to determine the dynamic power dissipation(PD in W):PD=CPD VCC2 fi N+(CL VCC2 fo)where:fi=input frequency in MHz;fo=output frequency in MHz;CL=output load capacitance in pF;VCC=supply voltage in V;N=number of inputs switching;(CL VCC2 fo)=sum of outputs.4.Ordering informationCIin
7、put capacitance-3.5-pFCI/Oinput/output capacitance-10-pFCPDpower dissipationcapacitance pertransceiverVI=GND toVCC 1.5 V1-30-pFTable 1:Quick reference data continuedGND=0 V;Tamb=25C;tr=tf=6 ns.SymbolParameterConditionsMinTypMaxUnitTable 2:Ordering informationType numberPackageTemperature rangeNameDe
8、scriptionVersion74HC245N40 C to+125 CDIP20plastic dual in-line package;20 leads(300 mil)SOT146-174HC245D40 C to+125 CSO20plastic small outline package;20 leads;body width 7.5 mmSOT163-174HC245PW40 C to+125 CTSSOP20plastic thin shrink small outline package;20 leads;body width 4.4 mmSOT360-174HC245DB4
9、0 C to+125 CSSOP20plastic shrink small outline package;20 leads;body width 5.3 mmSOT339-174HC245BQ40 C to+125 CDHVQFN20plastic dual-in-line compatible thermal enhancedvery thin quad flat package no leads;20 terminals;body 2.5 4.5 0.85 mmSOT764-174HCT245N40 C to+125 CDIP20plastic dual in-line package
10、;20 leads(300 mil)SOT146-174HCT245D40 C to+125 CSO20plastic small outline package;20 leads;body width 7.5 mmSOT163-174HCT245PW40 C to+125 CTSSOP20plastic thin shrink small outline package;20 leads;body width 4.4 mmSOT360-174HCT245DB40 C to+125 CSSOP20plastic shrink small outline package;20 leads;bod
11、y width 5.3 mmSOT339-174HCT245BQ40 C to+125 CDHVQFN20plastic dual-in-line compatible thermal enhancedvery thin quad flat package no leads;20 terminals;body 2.5 4.5 0.85 mmSOT764-1深圳市万瑞尔科技有限公司，NXP代理商，WWW.WONREAL.NET 0755-282697899397 750 14502 Koninklijke Philips Electronics N.V.2005.All rights reser
12、ved.Product data sheetRev.03 31 January 20053 of 22Philips Semiconductors74HC245;74HCT245Octal bus tranceiver;3-state5.Functional diagramFig 1.Logic symbolFig 2.IEC logic symbol21DIR1819B0B1B2B3B4B5B6B73174165156147138129A0A1A2A3A4A5A6A711OEmna1741731192116415514613712811918G33EN13EN22mna1759397 750
13、 14502 Koninklijke Philips Electronics N.V.2005.All rights reserved.Product data sheetRev.03 31 January 20054 of 22Philips Semiconductors74HC245;74HCT245Octal bus tranceiver;3-state6.Pinning information6.1Pinning6.2Pin description(1)The die substrate is attached to thispad using conductive die attac
14、hmaterial.It can not be used as supplypin or inputFig 3.Pin configuration DIP20,SO20,SSOP20 and TSSOP20Fig 4.Pin configuration DHVQFN20245DIRVCCA0OEA1B0A2B1A3B2A4B3A5B4A6B5A7B6GNDB7001aac4311234567891012111413161518172019001aac432245GND(1)Transparent top viewB6A6A7B5A5B4A4B3A3B2A2B1A1B0A0OEGNDB7DIRV
15、CC9128137146155164173182191011120terminal 1index areaTable 3:Pin descriptionSymbolPinDescriptionDIR1direction controlA02data input/outputA13data input/outputA24data input/outputA35data input/outputA46data input/outputA57data input/outputA68data input/outputA79data input/outputGND10ground(0 V)B711dat
16、a input/outputB612data input/outputB513data input/outputB414data input/outputB315data input/outputB216data input/output9397 750 14502 Koninklijke Philips Electronics N.V.2005.All rights reserved.Product data sheetRev.03 31 January 20055 of 22Philips Semiconductors74HC245;74HCT245Octal bus tranceiver
17、;3-state7.Functional description7.1Function table1H=HIGH voltage level;L=LOW voltage level;X=dont care;Z=high-impedance OFF-state.8.Limiting values1For DIP20 packages:above 70 C,Ptot derates linearly with 12 mW/K.For SO20 packages:above 70 C,Ptot derates linearly with 8 mW/K.For SSOP20 and TSSOP20 p
18、ackages:above 60 C,Ptot derates linearly with 5.5 mW/K.For DHVQFN20 packages:above 60 C,Ptot derates linearly with 4.5 mW/K.B117data input/outputB018data input/outputOE19output enable input(active LOW)VCC20supply voltageTable 3:Pin description continuedSymbolPinDescriptionTable 4:Function table1Inpu
19、tInput/outputOEDIRAnBnLLA=BinputLHinputB=AHXZZTable 5:Limiting valuesIn accordance with the Absolute Maximum Rating System(IEC 60134).Voltages are referenced toGND(ground=0 V).SymbolParameterConditionsMinMaxUnitVCCsupply voltage0.5+7VIIKinput diode currentVI VCC+0.5 V-20mAIOKoutput diode currentVO V
20、CC+0.5 V-20mAIOoutput source or sinkcurrentVO=0.5 V to VCC+0.5 V-35mAICC,IGNDVCC or GND current-70mATstgstorage temperature65+150CPtottotal power dissipation1DIP20 package-750mWSO20,SSOP20,TSSOP20 andDHVQFN20 packages-500mW9397 750 14502 Koninklijke Philips Electronics N.V.2005.All rights reserved.P
21、roduct data sheetRev.03 31 January 20056 of 22Philips Semiconductors74HC245;74HCT245Octal bus tranceiver;3-state9.Recommended operating conditions10.Static characteristicsTable 6:Recommended operating conditionsSymbolParameterConditionsMinTypMaxUnitType 74HC245VCCsupply voltage2.05.06.0VVIinput volt
22、age0-VCCVVOoutput voltage0-VCCVtr,tfinput rise and falltimesVCC=2.0 V-1000nsVCC=4.5 V-6.0500nsVCC=6.0 V-400nsTambambient temperature40-+125CType 74HCT245VCCsupply voltage4.55.05.5VVIinput voltage0-VCCVVOoutput voltage0-VCCVtr,tfinput rise and falltimesVCC=4.5 V-6.0500nsTambambient temperature40-+125
23、CTable 7:Static characteristics type 74HC245At recommended operating conditions;voltages are referenced to GND(ground=0 V).SymbolParameterConditionsMinTypMaxUnitTamb=25 CVIHHIGH-level input voltageVCC=2.0 V1.51.2-VVCC=4.5 V3.152.4-VVCC=6.0 V4.23.2-VVILLOW-level input voltageVCC=2.0 V-0.80.5VVCC=4.5
24、V-2.11.35VVCC=6.0 V-2.81.8VVOHHIGH-level output voltageVI=VIHor VILIO=20 A;VCC=2.0 V1.92.0-VIO=20 A;VCC=4.5 V4.44.5-VIO=20 A;VCC=6.0 V5.96.0-VIO=6.0 mA;VCC=4.5 V3.984.32-VIO=7.8 mA;VCC=6.0 V5.485.81-V9397 750 14502 Koninklijke Philips Electronics N.V.2005.All rights reserved.Product data sheetRev.03
25、 31 January 20057 of 22Philips Semiconductors74HC245;74HCT245Octal bus tranceiver;3-stateVOLLOW-level output voltageVI=VIHor VILIO=20 A;VCC=2.0 V-00.1VIO=20 A;VCC=4.5 V-00.1VIO=20 A;VCC=6.0 V-00.1VIO=6.0 mA;VCC=4.5 V-0.150.26VIO=7.8 mA;VCC=6.0 V-0.160.26VILIinput leakage currentVI=VCCor GND;VCC=6.0
26、V-0.1AIOZOFF-state output currentVI=VIHor VIL;VO=VCCor GND;VCC=6.0 V-0.5AICCquiescent supply currentVI=VCCor GND;IO=0 A;VCC=6.0 V-8.0ACIinput capacitance-3.5-pFCI/Oinput/output capacitance-10-pFTamb=40 C to+85 CVIHHIGH-level input voltageVCC=2.0 V1.5-VVCC=4.5 V3.15-VVCC=6.0 V4.2-VVILLOW-level input
27、voltageVCC=2.0 V-0.5VVCC=4.5 V-1.35VVCC=6.0 V-1.8VVOHHIGH-level output voltageVI=VIHor VILIO=20 A;VCC=2.0 V1.9-VIO=20 A;VCC=4.5 V4.4-VIO=20 A;VCC=6.0 V5.9-VIO=6.0 mA;VCC=4.5 V3.84-VIO=7.8 mA;VCC=6.0 V5.34-VVOLLOW-level output voltageVI=VIHor VILIO=20 A;VCC=2.0 V-0.1VIO=20 A;VCC=4.5 V-0.1VIO=20 A;VCC
28、=6.0 V-0.1VIO=6.0 mA;VCC=4.5 V-0.33VIO=7.8 mA;VCC=6.0 V-0.33VILIinput leakage currentVI=VCCor GND;VCC=6.0 V-1.0AIOZOFF-state output currentVI=VIHor VIL;VO=VCCor GND;VCC=6.0 V-5.0AICCquiescent supply currentVI=VCCor GND;IO=0 A;VCC=6.0 V-80ATamb=40 C to+125 CVIHHIGH-level input voltageVCC=2.0 V1.5-VVC
29、C=4.5 V3.15-VVCC=6.0 V4.2-VTable 7:Static characteristics type 74HC245 continuedAt recommended operating conditions;voltages are referenced to GND(ground=0 V).SymbolParameterConditionsMinTypMaxUnit9397 750 14502 Koninklijke Philips Electronics N.V.2005.All rights reserved.Product data sheetRev.03 31
30、 January 20058 of 22Philips Semiconductors74HC245;74HCT245Octal bus tranceiver;3-stateVILLOW-level input voltageVCC=2.0 V-0.5VVCC=4.5 V-1.35VVCC=6.0 V-1.8VVOHHIGH-level output voltageVI=VIHor VIL-IO=20 A;VCC=2.0 V1.9-VIO=20 A;VCC=4.5 V4.4-VIO=20 A;VCC=6.0 V5.9-VIO=6.0 mA;VCC=4.5 V3.7-VIO=7.8 mA;VCC=
31、6.0 V5.2-VVOLLOW-level output voltageVI=VIHor VIL-IO=20 A;VCC=2.0 V-0.1VIO=20 A;VCC=4.5 V-0.1VIO=20 A;VCC=6.0 V-0.1VIO=6.0 mA;VCC=4.5 V-0.4VIO=7.8 mA;VCC=6.0 V-0.4VILIinput leakage currentVI=VCCor GND;VCC=6.0 V-1.0AIOZOFF-state output currentVI=VIHor VIL;VO=VCCor GND;VCC=6.0 V-10.0AICCquiescent supp
32、ly currentVI=VCCor GND;IO=0 A;VCC=6.0 V-160ATable 7:Static characteristics type 74HC245 continuedAt recommended operating conditions;voltages are referenced to GND(ground=0 V).SymbolParameterConditionsMinTypMaxUnitTable 8:Static characteristics type 74HCT245At recommended operating conditions;voltag
33、es are referenced to GND(ground=0 V).SymbolParameterConditionsMinTypMaxUnitTamb=25 CVIHHIGH-level input voltageVCC=4.5 V to 5.5 V2.01.6-VVILLOW-level input voltageVCC=4.5 V to 5.5 V-1.20.8VVOHHIGH-level output voltageVI=VIHor VIL;VCC=4.5 VIO=20 A4.44.5-VIO=6 mA3.984.32-VVOLLOW-level output voltageVI
34、=VIHor VIL;VCC=4.5 VIO=20 A-00.1VIO=6.0 mA-0.150.26VILIinput leakage currentVI=VCCor GND;VCC=5.5 V-0.1AIOZOFF-state output currentVI=VIHor VIL;VCC=5.5 V;VO=VCC or GND per input pin;other inputs at VCCor GND;IO=0 A-0.5AICCquiescent supply currentVI=VCCor GND;IO=0 A;VCC=5.5 V-8.0A9397 750 14502 Konink
35、lijke Philips Electronics N.V.2005.All rights reserved.Product data sheetRev.03 31 January 20059 of 22Philips Semiconductors74HC245;74HCT245Octal bus tranceiver;3-stateICCadditional quiescent supplycurrent per input pinVI=VCC 2.1 V;other inputs atVI=VCCor GND;VCC=4.5 V to 5.5 V;IO=0 AAn or Bn inputs
36、-40144AOE input-150540ADIR input-90324ACIinput capacitance-3.5-pFCI/Oinput/output capacitance-10-pFTamb=40 C to+85 CVIHHIGH-level input voltageVCC=4.5 V to 5.5 V2.0-VVILLOW-level input voltageVCC=4.5 V to 5.5 V-0.8VVOHHIGH-level output voltageVI=VIHor VIL;VCC=4.5 VIO=20 A4.4-VIO=6 mA3.84-VVOLLOW-lev
37、el output voltageVI=VIHor VIL;VCC=4.5 VIO=20 A-0.1VIO=6.0 mA-0.33VILIinput leakage currentVI=VCCor GND;VCC=5.5 V-1.0AIOZOFF-state output currentVI=VIHor VIL;VCC=5.5 V;VO=VCC or GND per input pin;other inputs at VCCor GND;IO=0 A-5.0AICCquiescent supply currentVI=VCCor GND;IO=0 A;VCC=5.5 V-80AICCaddit
38、ional quiescent supplycurrent per input pinVI=VCC 2.1 V;other inputs atVI=VCCor GND;VCC=4.5 V to 5.5 V;IO=0 AAn or Bn inputs-180AOE input-675ADIR input-405ATamb=40 C to+125 CVIHHIGH-level input voltageVCC=4.5 V to 5.5 V2.0-VVILLOW-level input voltageVCC=4.5 V to 5.5 V-0.8VVOHHIGH-level output voltag
39、eVI=VIHor VIL;VCC=4.5 VIO=20 A4.4-VIO=6 mA3.7-VVOLLOW-level output voltageVI=VIHor VIL;VCC=4.5 VIO=20 A-0.1VIO=6.0 mA-0.4VILIinput leakage currentVI=VCCor GND;VCC=5.5 V-1.0AIOZOFF-state output currentVI=VIHor VIL;VCC=5.5 V;VO=VCC or GND per input pin;other inputs at VCCor GND;IO=0 A-10ATable 8:Stati
40、c characteristics type 74HCT245 continuedAt recommended operating conditions;voltages are referenced to GND(ground=0 V).SymbolParameterConditionsMinTypMaxUnit9397 750 14502 Koninklijke Philips Electronics N.V.2005.All rights reserved.Product data sheetRev.03 31 January 200510 of 22Philips Semiconduc
41、tors74HC245;74HCT245Octal bus tranceiver;3-state11.Dynamic characteristicsICCquiescent supply currentVI=VCCor GND;IO=0 A;VCC=5.5 V-160AICCadditional quiescent supplycurrent per input pinVI=VCC 2.1 V;other inputs atVI=VCCor GND;VCC=4.5 V to 5.5 V;IO=0 AAn or Bn inputs-196AOE input-735ADIR input-441AT
42、able 8:Static characteristics type 74HCT245 continuedAt recommended operating conditions;voltages are referenced to GND(ground=0 V).SymbolParameterConditionsMinTypMaxUnitTable 9:Dynamic characteristics type 74HC245GND=0 V;test circuit see Figure 7.SymbolParameterConditionsMinTypMaxUnitTamb=25 CtPHL,
43、tPLHpropagation delay An to Bn or Bnto Ansee Figure 5VCC=2.0 V-2590nsVCC=4.5 V-918nsVCC=5.0 V;CL=15 pF-7-nsVCC=6.0 V-715nstPZH,tPZL3-state output enable time OE toAn or OE to Bnsee Figure 6VCC=2.0 V-30150nsVCC=4.5 V-1130nsVCC=6.0 V-926nstPHZ,tPLZ3-state output disable time OE toAn or OE to Bnsee Fig
44、ure 6VCC=2.0 V-41150nsVCC=4.5 V-1530nsVCC=6.0 V-1226nstTHL,tTLHoutput transition timesee Figure 5VCC=2.0 V-1460nsVCC=4.5 V-512nsVCC=6.0 V-410nsCPDpower dissipation capacitanceper transceiverVI=GND to VCC1-30-pFTamb=40 C to+85 CtPHL,tPLHpropagation delay An to Bn or Bnto Ansee Figure 5VCC=2.0 V-115ns
45、VCC=4.5 V-23nsVCC=6.0 V-20ns9397 750 14502 Koninklijke Philips Electronics N.V.2005.All rights reserved.Product data sheetRev.03 31 January 200511 of 22Philips Semiconductors74HC245;74HCT245Octal bus tranceiver;3-state1CPDis used to determine the dynamic power dissipation(PD in W):PD=CPD VCC2 fi N+(
46、CL VCC2 fo)where:fi=input frequency in MHz;fo=output frequency in MHz;CL=output load capacitance in pF;VCC=supply voltage in V;N=number of inputs switching;(CL VCC2 fo)=sum of outputs.tPZH,tPZL3-state output enable time OE toAn or OE to Bnsee Figure 6VCC=2.0 V-190nsVCC=4.5 V-38nsVCC=6.0 V-33nstPHZ,t
47、PLZ3-state output disable time OE toAn or OE to Bnsee Figure 6VCC=2.0 V-190nsVCC=4.5 V-38nsVCC=6.0 V-33nstTHL,tTLHoutput transition timesee Figure 5VCC=2.0 V-75nsVCC=4.5 V-15nsVCC=6.0 V-13nsTamb=40 C to+125 CtPHL,tPLHpropagation delay An to Bn or Bnto Ansee Figure 5VCC=2.0 V-135nsVCC=4.5 V-27nsVCC=6
48、.0 V-23nstPZH,tPZL3-state output enable time OE toAn or OE to Bnsee Figure 6VCC=2.0 V-225nsVCC=4.5 V-45nsVCC=6.0 V-38nstPHZ,tPLZ3-state output disable time OE toAn or OE to Bnsee Figure 6VCC=2.0 V-225nsVCC=4.5 V-45nsVCC=6.0 V-38nstTHL,tTLHoutput transition timesee Figure 5VCC=2.0 V-90nsVCC=4.5 V-18n
49、sVCC=6.0 V-15nsTable 9:Dynamic characteristics type 74HC245 continuedGND=0 V;test circuit see Figure 7.SymbolParameterConditionsMinTypMaxUnit9397 750 14502 Koninklijke Philips Electronics N.V.2005.All rights reserved.Product data sheetRev.03 31 January 200512 of 22Philips Semiconductors74HC245;74HCT
50、245Octal bus tranceiver;3-state1CPDis used to determine the dynamic power dissipation(PD in W):PD=CPD VCC2 fi N+(CL VCC2 fo)where:fi=input frequency in MHz;fo=output frequency in MHz;CL=output load capacitance in pF;VCC=supply voltage in V;N=number of inputs switching;(CL VCC2 fo)=sum of outputs.Tab