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74AC161 数据表(PDF) 6 Page - STMicroelectronics

部件名 74AC161
功能描述  SYNCHRONOUS PRESETTABLE 4-BIT COUNTER
PDF  12 Pages
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制造商  STMICROELECTRONICS [STMicroelectronics]
网页  http://www.st.com
标志 STMICROELECTRONICS - STMicroelectronics

74AC161 数据表(HTML) 6 Page - STMicroelectronics

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AC ELECTRICAL CHARACTERISTICS (CL = 50 pF, RL = 500
Ω, Input tr =tf =3 ns)
Symb ol
Parameter
T est Con ditio n
Valu e
Un it
VCC
(V)
TA =25
oC
-40 to 85
oC
Min.
T yp.
Max.
Mi n.
Max.
tPLH
tPHL
Propagation Delay Time
CK to Q
3.3
(*)
7.0
12.0
13.0
ns
5.0
(**)
5.0
9.0
10.0
tPLH
tPHL
Propagation Delay Time
CK to CARRY OUT
3.3
(*)
8.5
14.0
15.0
ns
5.0
(**)
6.0
10.0
11.0
tPLH
tPHL
Propagation Delay Time
TE to CARRY OUT
3.3
(*)
5.5
9.5
11.0
ns
5.0
(**)
3.5
6.5
7.5
tPHL
Propagation Delay Time
CLR to Q
3.3
(*)
6.5
12.0
13.0
ns
5.0
(**)
5.5
9.0
10.0
tPHL
Propagation Delay Time
CLR to CARRY OUT
3.3
(*)
7.0
12.0
13.0
ns
5.0
(**)
5.5
9.5
10.0
twL
CLR pulse Width, LOW
(LOAD)
3.3
(*)
3.0
5.5
7.5
ns
5.0
(**)
2.5
4.5
6.0
tw
CK pulse Width
HIGH or LOW
3.3
(*)
2.0
3.5
4.0
ns
5.0
(**)
2.0
3.0
3.5
ts
Setup Time HIGH or LOW
(INPUT to CLOCK)
3.3
(*)
4.0
13.5
16.0
ns
5.0
(**)
1.5
8.5
10.5
th
Hold Time HIGH or LOW
(INPUT to CLOCK)
3.3
(*)
-1.0
-1.0
0.5
ns
5.0
(**)
-0.5
0.5
1.0
ts
Setup Time HIGH or LOW
(CLEAR to CLOCK)
3.3
(*)
3.0
11.5
14.0
ns
5.0
(**)
2.0
7.5
8.5
th
Hold Time HIGH or LOW
(CLEAR to CLOCK)
3.3
(*)
-2.5
0
0
ns
5.0
(**)
-2.0
0.5
1.0
ts
Setup Time HIGH or LOW
(PE or TE to CLOCK)
3.3
(*)
3.0
6.0
7.0
ns
5.0
(**)
2.0
4.5
5.0
th
Hold Time HIGH or LOW
(PE or TE to CLOCK)
3.3
(*)
-3.5
0
0
ns
5.0
(**)
-2.0
0
0.5
tREM
Recovery Time
CLR to CLOCK
3.3
(*)
-1.0
0
0.5
ns
5.0
(**)
-0.5
0.5
1.0
fMAX
Maximum Clock Frequency
3.3
(*)
70
110
60
MHz
5.0
(**)
110
165
95
(*) Voltage range is 3.3V
± 0.3V
(**) Voltage range is 5V
± 0.5V
CAPACITIVE CHARACTERISTICS
Symb ol
Parameter
Test Co nditi ons
Valu e
Un it
VCC
(V)
TA =25
oC
-40 to 85
oC
Min.
T yp.
Max.
Mi n.
Max.
CIN
Input Capacitance
5.0
4.5
pF
CPD
Power Dissipation
Capacitance (note 1)
5.0
fIN = 10 MHz
45
pF
1) CPD isdefined as the value of the IC’sinternal equivalent capacitance which is calculated fromthe operating current consumption without load. (Referto
Test Circuit).Average operting current can be obtained by the following equation. ICC(opr) = CPD
• VCC • fIN +ICC/n(per circuit)
74AC161
6/12



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