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参数资料
| 型号： | MC74AC4020N |
| 厂商： | MOTOROLA INC |
| 元件分类： | 通用总线功能 |
| 英文描述： | 14-STAGE BINARY RIPPLE COUNTER |
| 中文描述： | AC SERIES, ASYN NEGATIVE EDGE TRIGGERED 14-BIT UP BINARY COUNTER, PDIP16 |
| 封装： | PLASTIC, DIP-16 |
| 文件页数： | 4/5页 |
| 文件大小： | 125K |
| 代理商： | MC74AC4020N |
MC74AC4020
5-4
FACT DATA
AC CHARACTERISTICS
(For Figures and Waveforms — See Section 3)
Symbol
Parameter
(V)
74AC
74AC
Unit
No.
VCC*
TA = +25
°
C
CL = 50 pF
TA = –40
°
C
to +85
°
C
CL = 50 pF
Fig.
Min
Typ
Max
Min
Max
fmax
Maximum Clock
Frequency
3.3
5.0
110
130
0
100
120
MHz
140
tPLH
Propagation Delay
CP to Q1
3.3
5.0
2.0
2.0
11
8.0
2.0
2.0
14
10
ns
tPHL
Propagation Delay
CP to Q1
3.3
5.0
2.0
2.0
11
8.0
2.0
2.0
14
10
ns
tPLH
Propagation Delay
CP to Q4
3.3
5.0
2.0
2.0
18
13
2.0
2.0
21
16
ns
tPHL
Propagation Delay
CP to Q4
3.3
5.0
2.0
2.0
18
13
2.0
2.0
21
16
ns
tPHL
Propagation Delay
Reset to any Q
3.3
5.0
3.0
3.0
12
10
3.0
3.0
15
12
ns
tPHL
Propagation Delay
On to Qn +1
Propagation Delay
On to Qn +1
3.3
5.0
0
0
5.5
3.5
0
0
6.5
4.5
ns
tPHL
3.3
5.0
0
0
5.5
3.5
0
0
6.5
4.5
ns
trec
MR to CP
Recovery Time
3.3
5.0
0
0
–2.5
–1.5
0
0
ns
tw CP
Minimum Pulse Width
Clock Pin
3.3
5.0
4.0
3.0
3.5
2.5
4.5
3.5
ns
tw MR
Minimum Pulse Width
Master Reset
3.3
5.0
4.0
3.0
3.5
2.5
4.5
3.5
ns
* Voltage Range 3.3 V is 3.3 V
±
0.3 V.
Voltage Range 5.0 V is 5.0 V
±
0.5 V.
CAPACITANCE
Symbol
Parameter
Value
Typ
Unit
Test Conditions
CIN
Input Capacitance
4.5
pF
VCC = 5.0 V
CPD
Power Dissipation Capacitance
50
pF
VCC = 5.0 V
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