Title: 2.2 TTL?????
1??? ?????
2.1 ???????
2.2 TTL?????
2.3 MOS?????
2.4 ??????????
2.5 ????????????
?? ???
2 2.1 ???????
???????????? 1.????
? ? ? ? ??
VA(V) VB(V) VL(V)
0V 0V 5V 5V 0V 5V 0V 5V 0V 0V 0V 5V
3 2.????
? ? ? ? ??
VA(V) VB(V) VL(V)
0V 0V 5V 5V 0V 5V 0V 5V 0V 5V 5V 5V
4?????????
? ? ? ?
VA(V) VL(V)
0V 5V 5V 0V
5?????????????
(1)?????????,???????????????? (2)??????
6???? ??????(??)???????????????
7??DTL?????
???? (1)?A?B?C??????5V?,???D1D3???,?D4?D5?T??,?
T?????, VL0.3V,??????? (2)A?B?C??????????0.3V?,?V
P1V,???D4?D5?T???,VLVCC5V,??????? ?????????????
,?
82.2 TTL?????
??TTL????????????? 1.TTL????????
9TTL????????
102.TTL????????
(1)???????3.6V?? T2?T3????,
??T3????,????? VOVCES30.3V
??T2????,VC21V?
T4????D????
???????? ????? ????????, ???????
11(2)??????0.3V ??
??T4?D??,?? VOVCC-VBE4-VD
5-0.7-0.73.6(V)
??????,VB11V?T2?T3????
????RC2???,VB4VCC5V ?
????????? ??????? ???????, ???????
12??TTL????????
1.TTL???????????? (1)??????????????????????
13- (2)?????????,???????,????????????
142.TTL?????????tpd
??????tPHL?????????????????????????????
??????tPLH?????????????????????????????
??TTL?????????tpd????????????
15??TTL????????????????
1.???????? Vof(Vi)
162.??????
- (1)???????VOH???????????1??????VOH?????3.6V,??
???????????VOH(min)2.4V? - (2)???????VOL???????????0??????VOL?????0.3V,??
???????????VOL(max)0.4V? - (3)??????VOFF?????????VOH(min)??????????????????
??????????????????,?VIL(max)???????VIL(max)0.8V?
17(4)??????VON?????????VOL(max)???????????????????
?????????????????,?VIH(min)???????VIH(min)2V?
(5)????Vth??????????????????,??????????????,????
???????????? ???VthVOFFVON
?ViltVth,?????,?????
VigtVth,?????,?????? Vth??????????????Vth???1.
3V1.4V?
183.?????
TTL???????????????,???????
??,??????????????,??????????????,???????
- ??????? VNLVOFF-VOL(max)0.8V-0.4V0.4V
- ??????? VNHVOH(min)-VON2.4V-2.0V0.4V
191.???????IIL????????IIH(1)???????IIL???????????
????,?????????????
??TTL?????????
????IILlt1.6mA?
20(2)???????IIH???????????????,?????????
?????
- ????????
- IIHßPIB1,
- ßP??????????????
???????? IIHßiIB1, ßi?????????????
- ??ßp?ßi??????1,
- ??IIH??????,????IIHlt40uA?
21 (1)???????????????,????????????
2.?????
?????????,?????,??T3????,??????????,?????????
????????????IOL,????IOL16mA??????
22 (2)???????????????,????????,??????????
??????,RC4??????,????????????,??????????????
???????IOH?
????IOH0.4mA? ?????
NOH??????????????
- ??NOL?NOH,???????????????????,?NO???
23??TTL?????7400
7400??????TTL?????,????4?2??????,??14?????????????
?
24?? TTL????????
1.??
25 26 274.??????( OC?)
- ??????,????????????????,??????,????????
TTL?????????? - ??,????????????????????????
28OC????????????
(1)????? ?????
(2)??????? ???,?????????10V?
(3)?????? ????????????????
29OC??????,??????RP???
- (1)???????,
- RP?????RP?????????????VOH(min)?
?
30(2)???????
RP?????RP?????????????VOL(max)?
?? RP(min)ltRPltRP(max)
315.???
- (1)??????????????
- ?EN0?,G???1,D1??,???????????????,?????????
- ?EN1?,G???0,T4?T3??????????L???,????,?????,?????
????G,?EN1?,?????, EN0?,?????
32(2)??????
- ????????????????????
- (a)??????????????????
(b)??????, ????????????
33??TTL???????????
1.74???TTL?????????,???TTL??? 2.74L??????TTL??
,??LTTL??? 3.74H?????TTL??? 4.74S??????TTL??,?
????????
74S??????? (1)?????????
3474S??????? (1)?????????
(2)?Re2?????????? (3)???????????? (4)???????????
??
5.74LS???????????? 6.74AS??????????, 7.74ALS??
???? ????????
352.3 MOS?????
?? NMOS??? 1.NMOS??
- ????(?????????VT1VT24V,?gm1gtgtgm2 )
- (1)???Vi????8V?,T1??,T2??????gm1gtgtgm2,?????????RDS
1ltltRDS2,????? -
?????????
36(2)???Vi????0V?,
T1??,T2??? VOVDD-VT8V VOH ,????????
???????????
2.NMOS??? (1)???
37(2)???
38??CMOS??
CMOS???????N??MOSFET?P??MOSFET?????
- 1.????
- (?VDDgt(VTNVTP),?VTNVTP)
- (1)?Vi0V?,TN??,TP?????VOVDD?
- (2)?ViVDD?,TN??,TP??,??VO0V?
392.??????
(? VDD10V, VTNVTP2V)
- (1)?Vilt2V,TN??,TP??,VoVDD10V?
(2)?2VltVilt5V,TN??????,TP?? ???????
(3)?Vi5V,?????????, Vo(VDD/2)5V?
(4)?5VltVilt8V, TP??????, TN?????????
(5)?Vigt8V,TP??, TN??,Vo0V?
CMOS???????? VthVDD/2
403.????
??CMOS???????????????,?????????,?????????????
CMOS?????????????10ns?
41?????CMOS???
1.CMOS????????? (1)???
42 ??????????,??????????????????
432.CMOS?????
?????,??????,???
???????,??????,??
443 .CMOS???
- ?EN1?,TP2?TN2????,????????
- ??,??????????????
45 ????(????????VTNVTP)
46?? CMOS?????????????
- 1.CMOS????????
- (1)???CMOS4000???
- (2)???CMOSHC???
- (3)?TTL?????CMOSHCT???
- 2.CMOS????????????
- (1)VOH(min)0.9VDD VOL(max)0.01VDD?
- ??CMOS????????(???????)???
- (2)????Vth??VDD/2?
- (3)CMOS???????VOFF?0.45VDD,????VON?0.55VDD???,????
????????0.45VDD? - (4)CMOS???????,????1 mW/?
- (5)?CMOS??????????,????????,??50?
472.4 ??????????
- ??TTL?CMOS?????????
- ???????????????,?????????????????????????????,?
??????? - ????VOH(min)????VIH(min)
- ????VOL(max)????VIL(max)
- ????IOH(max)????IIH(?)
- ????IOL(max)????IIL(?)
48??TTL?CMOS???????????
1.??????????????????????? (a)?TTL??????????LED,??
?????????????W????????
- (b)?TTL?????5V??????,?????D???,????????
492.??????
(a)???????????????????
(b)?????????????,????????
50??????????
(1)????????,???????????????????,??????????,????
???????????
- (2)????????,??????????,?????????????????????
51 2.5 ????????????
1.?????????????????????,????????
2.????????????????,????????
- 3.??????????,?????????,????????
521.?????????????????????????????????????
2.???????????????????,???NPN??????,??TTL????????M
OSFET??,??MOS????? 3.TTL??????????????????????
?????????,??????????????,?????????????????TTL???,?
??????????????????,?????????????
4.MOS????????????????NMOS???,????CMOS?????TTL?????
,????????,????,?????,?????TTL??,???????????????
5.?????????????,???TTL?CMOS??????????????????,???
?????????,????????????????????????