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3.2TTL3.2.1BJT3.2.2BJT3.2.3TTL3.2.4TTL3.2.5—3.2TTL3.2.1BJTT,vOVCEVCCcevI=0V:T,vOVCE0.2VcevI=5V:iCICSVRCCcceVCES0.2~0.3VVCEVCCiCRcVCEOVCCiBicβiBiC0iBiB0BJT0iBβCSIβCSI2.BJTton(=td+tr)toff(=ts+tf)BJT3.2.2BJTCLυOBJTTTL3.2.3TTLT3DT4Rc4Rb14kΩRc21.6kΩRc4130ΩT4DT2T1+–vIT3+–vORe21KΩVCC(5V)T2Rc2Re2T2T1Rb12.TTLT1V3.6V70705DBE4B4O=−−=−−=)..(vvvvυ=0.2VT4D4T3T20.2V0.9V3.6VT2T3T4D2υI=3.6VT2T3T1:T4D.vO=vC3=VCES3=0.2V3.6V2.1V0.2VAL0110L=AT4D4T3T2T13TTLυI3.6V0.2V•T2T3T1•T1JeJcT1T11+β1iB1T2,4υO=0.2VT4T3.υ3.6V,T3T4,.1.TTLBJTT1eebceebcA&BAL=B3.2.4TTLTTLTTL•υIT1T2T4T3υO(3.6V)0.2V(0.2V)3.6V2.TTLAB:AB:T2AT2BT3T4DT2AT2BT3T4BAL+=vOHvOL3.2.5VCC(5V)Rb14kRc21.6kRc4130T4ABCT1T2DRe21kT3VCC(5V)Rb14kRc21.6kRc4130T4ABCT1T2DRe21kT3abCL=ABOCVCCT1Re2Rc2Rc4Rb1T2T3T4DABLVCCT1Re2Rc2Rb1T2T3ABLVCCCDRPVDDLAB&&2.(TSL)EN=3.6VENAB00L101110111010EN=0.2VENAB00101110111001==ZLABLEN=0____EN=1ABEN&LEN3.53.5.13.5.23.5.13.5ABL110100010001ABL0010111011102.ABLLLHLHHHLHHHL⇔⇔⇔3.5.21ABL=BA+=LAB=⋅&BABABAL+=1BABAL⋅=+=BALAB=+1BAL⋅=&BABAABL+==&BABAABBAL=+=1L=ABBABAL⋅=+=BABAL+=⋅=BA1&BAL=A+B&BAL1&BA&BAL1&BA&BAL&&BALAB=⋅&BARE&1Y0Y1Y2Y3Y4Y5Y6Y7D0D1D2D3D4D5D6D7ICLENALG1G2ALREL⋅=0=AL1=REL=0REALENRE&LG2ALREALEN&ALG2LREREALEN&ALG2LRE3.63.6.13.6.23.6.1TTLCMOS1)2)vOvI11VOH(min)vOVOL(max)vIVIH(min)VIL(max)VOH(min)VIH(min)VOL(max)VIL(max)IILIOLIILIIHIOHIIH10111…1n01110…1nIOH(max)IIH(total)IOL(max)IIL(total)1VOH(min)VIH(min)2VOL(max)VIL(max)4IOL(max)IIL(total)IOH(max)IIH(total)31CMOSTTLVOHmin)=4.9VVOL(max)=0.1VTTL74VIH(min)=2VVIL(max)=0.8VIOHmax)=-0.51mAIIHmax)=20µACMOS(4000IOLmax)=0.51mAIILmax)=-0.4mAVOH(min)VIH(min)VOL(max)VIL(max)T3VCCVDDT4R1R2R3T1T2IOH(max)IIH(total)?74HC0074TTL74LSCMOSVOHmin)=3.84VVOL(max)=0.33VIOHmax)=-4mAIOLmax)=4mA74HC00IIHmax)=004mAIILmax)=1.6mA74VIHmin)=2VVIL(max)=0.8V&111…CMOS7474LSIILmax)=-0.4mAIIHmax)=0.02mAVOH(min)VIH(min)VOL(max)VIL(max)IIL(total)=1.6mA+6×0.4mA=4mA74HC00:IOH(max)=4mA74:IIH(max)=0.04mA74LSIIH(max)=0.02mAIIH(total)=0.04mA+6×0.02mA=0.16mA74HC00:IOL(max)=4mA74:IIL(max)=1.6mA74LSIIL(max)=0.4mA&111…CMOS74TTLCMOS(74HCVOH(min)2.7VVIH(min)3.5VTTL74LSCMOSHC234VOH(min)VIH(min)IOTTLT3IHOOHn(IIRVVPDD+−=3.6.21.LEDRvI1DFOHIVVR−=DOLFCCIVVVR−−=LED,LEDVCCLEDRvI13.6.274HC04CMOSLEDLEDmAVF1.6VAVCC=5VVOL=0.1VIOL(max)=4mAID4mAΩ825mA4V10615=−−=)..(RvI113.6.31.2