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??TTL???

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Title: ??TTL???


1
??? ????
???????? ???????????? ??????? ??????
2
????
  • ??TTL???
  • 2.????TTL???
  • 3.????TTL???

3
(No Transcript)
4
??TTL???
???
A B C O
0 0 0 1
0 0 1 1
0 1 0 1
0 1 1 1
1 0 0 1
1 0 1 1
1 1 0 1
1 1 1 0
????TTL???
5
  • ????TTL???????

4K
4K
4K
4K
???? 1.???????,?????????,?VbeF0.7V,????????,
?VbeS0.7V. 2.?????????,?VbcF0.60.7V? 3.???????,
?T1?????,?Ic????,?VceS0.1V,????? VceS0.3V
??TTL???
6
1. ?????????????????
VCC
VOL0.3V VB1 VBE1VOL 0.3V0.7V
1V
4K
4K
R1
R2
1V
B1
VB1????1V
A
B2
IC1
B
0.4V
C
IB1(VCC-1V)/R1 5V-1V/4K1mA
T2???????,Ic1??, ??ßIB1gt Ic1,T1????, VOCS10.1V,VB
20.4V
??TTL???
7
2. ?????????
VCC
VOH5V VB1 VBC1VBE2 0.7V0.7V
1.4V
4K
4K
R1
R2
1.4V
B1
VB1????1.4V
A
B2
B
IC1
C
T1???????,?????,????????,?????????,T2???????
IB2-IC1IB1bIB1IB1(blt0.01)
T2???,T2??????VCES0.3V
IB1(VCC-VB1)/R1 5V-1.4V/4K0.9mA ?
IB20.9mA
? VOL0.3V
??TTL???
8
T1?????????
4K
4K
??ßF20, ßR0.02
IB1(VCC-VB1)/R1 5V-1.4V/4K0.9mA
0.7V
-IE1ßRIB10.020.90.018mA
-IC1(ßR1)IB10.918IB2
??T2?????????
?R2???????18mA4K72V
???
9
  • ????TTL????????
  1. ??????

Q1
VOH
VOH???????1????????
VO(V)
VOL???????0????????
Q2
VIL?????????1???????
VOL
Vi(V)
VIL
VIH?????????0???????
VIH
10
?????????
???? ??
???? ??
VOH
VOL
VIL
VOH
VIH
VOL
??
??
11
?????????
"1"
?????
VNMH
VOH
VIH
???
VIL
VNML
VOL
?????
"0"
Gate Input
Gate Output
VNMLVIL-VOL VNMHVOH-VIH
12
?????????
VDD
???????
???
VOH
??
NMHVOH-VIH
?????
VIH
???
VIL
?????
NMHVOH-VIH
????? ????
??
VOL
???????
???
0
????VOLltVIL
????lt VIL-VOL
????VIHltVOH
????lt VOH-VIH
13
2.?????
VOH
VOH
VOH
VO(V)
VO(V)
VO(V)
VOL
VOL
VOL
VIL
VIL
VIL
VIH
VIH
VIH
Vi(V)
Vi(V)
Vi(V)
14
VOH
VNMH
VNMHVOH-VIH
VL
VO(V)
VNMLVIL-VOL
VNML
VOL
VIL
VIH
Vi(V)
15
???????????
VA 0?0.6V gt0.6V
0.6V
VNMHVOH-VIH
VNMLVIL-VOL
VNML0.6V-0.3V0.3V
16
2. ????
??TTL???
17
  • ????TTL????????-????

??????? ?????????
NN
??
18
VCC
1. ??????????
4K
R1
R2
4K
IIL
IC
B1
B2
?
????ICNNIIL
T2
T1
? ? ?
IIL(VCC-VBES)/R1(5V-0.7V)/4K1.1mA
N?
IIL
??NN3
19
VCC
2. ??????????
4K
R1
R2
4K
?????????3V
IIH
IC
B1
B2
?
????ICNNIIH
T2
T1
? ? ?
IIH-IE0.018mA
N?
VOHVCC-ICR2 3V
IIH
NN25
20
  • ????TTL????????

PICCVCC
3. ????
4K
4K
  • ???????????????

1.???????? ICCL
2.???????? ICCH
3.?? ??????
21
  • ????TTL????????

Vi
t
0
Vi
t
0
t0
t1
t2
t3
t4
t5
tdt1-t2 tft2-t1 tst4-t3 trt5-t6
  1. ????
  2. ????
  3. ????
  4. ????

22
? ????????tpd
??????tPHL ????????50???????????50 ?????????,
??????tPLH????????50 ???????????50 ?????????,
????????tpd
??
23
??TTL??????
VCC
???
???
??
???
??
???
VSS
24
??TTL?????? 1.???????? 2.?????????? 3.IB2??,??????
?
???????
25
  • ??????TTL???

R5
26
  • ??????TTL???

VCC
180
R3
R1
R2
T3
B1
VO
B2
T2
T1
T5
R4
??????
  1. T2???????????VNML????????,????????????
  2. T3?T5??????(???????),??????????
  3. T5????????,???????????

27
?????????????????
????TTL???
????TTL???
T2????????????
  • ????????
  • ??????????
  • IB2?,??????

28
R5
?????,T2?T5??
T3
VOVOL ??,T2???????????????
VC2-VOVCES2VBES5-VCES5VBES50.8V
T5?D??????
D?????????
29
????TTL???
????TTL???
VCC
R5
R5
R1
R2
B1
T3
T3
T4
B2
A
T2
VO
T1
B
T5
T5
T3?T4???????,T4???????? ???T4?????????,?????? ????
??
30
5???TTL?????
31
TTL???????
? ????????????
T1?A??????,Vb1 VA Vbe1 1V, ????????????.
1V
5V
3 .6V
0 .3V
3 .6V
Vb1 1V,??T2?T5??, VC2Vcc5V,
3 .6V
T3?????? T4????? ????????
? 5-0.7-0.73.6V
32
TTL???????
? ????????
T1Vb1 Vbc1Vbe2Vbe5 0.7V3 2.1V
???????????.????????
2.1V
0 .3V
T2????
3 .6V
T3Vc2Vces2Vbe51V, ?T3??, Ve3Vc2-Vbe31-0.70.
3V, ?T4???
3 .6V
3 .6V
T5????,
??????????VOL0.3V
33
TTL???????
? ????????,??????
? ????????????,??????
??????????????????????
34
TTL???????
????TTL??????????MOS??,???????????T5?????????,???
???????,????????????????????,????????
???TTL???
???????????????T1?T2?T3?T5????????????(SBD)??????,
????????,??????
35
C
S
E
P
n
P
n
p
n-epi
n-BL
P-Si
36
???TTL???
? ????????
1???????
??????????
?????????
2????????
T2?T5????,???????????????,????,?????????VNL???0.7V
??
??
37
TTL?????????????
? ??????
TTL???????VI?????VO???????,? VO f(VI)
??
38
TTL?????????????
? ?????(????)
V IL
??????????VOH?????????
VIH
??????????VOL?????????
???????V NL
V NL V IL - VOL
???????V NH
V NH V IH - VOH
VOH
VOL
VIL
VIH
39
??????II??T1????????,????
TTL?????????????
? ????
????????????????,?II f(VI)
1. ??????ISD(?????????IIL)
????????,IIL??????,???????
?VIL 0V??????????
2. ?????IIH(???????)
??????????,?????????,????????????10µA??
??
40
TTL????????????
? ????Ni?????NO
1. ????Ni???????????
2. ????NO??????(?????)????????????
??IOLmax????????,,IIL?????????????(1.4mA)?No??,??
????????
??
41
TTL????????????
? ????????tpd
??????tPHL????????50???????????50 ?????????,
??????tPLH????????50 ???????????50 ?????????,
????????tpd
??
42
2-2 ????TTL???
?????(TSL)
43
?????TTL???(OC?)
????TTL???????????
??????? 1????2????? 2????????????
0
1
?TTL??? ??????
44
?????TTL???(OC?)
?
??????????,T2?T5??,??F????
????
???????????,T2?T5??,??F?????????VC?
?????? ???0.3V ????VC(5-30V)
? OC?????????
45
?????TTL???(OC?)
? ????RL???
46
?????TTL???(OC?)
OC??????,????VC???5V30V,??OC???TTL???????????????
?????????
47
?????(TSL)
??F?????????Z
Z
1
0.3
48
?????
?????
49
?????(Three State Logic, TSL)
? ??????
1. ?????????????
??????????????,????????????,?????????
2. ????
?E0?,?1??,?2??,???A??B
E1?,?1??,?2??,???B??A?
50
TTL???
51
TTL????
????????????????
52
? ?
  1. P84-85, 4.10 4.12(b)
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