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CD74AC191 Datasheet(PDF) 5 Page - Texas Instruments

Part # CD74AC191
Description  Presettable Synchronous 4-Bit Binary Up/Down Counter
PDF  10 Pages
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Manufacturer  TI [Texas Instruments]
Direct Link  http://www.ti.com
Logo TI - Texas Instruments

CD74AC191 Datasheet(HTML) 5 Page - Texas Instruments

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5
Prerequisite For Switching Function
PARAMETER
SYMBOL
VCC (V)
-40oC TO 85oC
-55oC TO 125oC
UNITS
MIN
MAX
MIN
MAX
AC TYPES
Max. Frequency
fMAX
(Note 10)
1.5
5.5
-
4.8
-
MHz
3.3
(Note 8)
49
-
43
-
MHz
5
(Note 9)
68
-
60
-
MHz
CP Pulse Width
tW
1.5
91
-
104
-
ns
3.3
10.5
-
11.6
-
ns
5
7.3
-
8.3
-
ns
PL Pulse Width
tW
1.5
66
-
75
-
ns
3.3
7.4
-
8.4
-
ns
5
5.3
-
6
-
ns
Recovery Time
tREC
1.5
71
-
81
-
ns
3.3
8
-
9.1
-
ns
5
5.7
-
6.5
-
ns
Set-Up Time, Pn to PL
tSU
1.5
44
-
50
-
ns
3.3
4.9
-
5.6
-
ns
5
3.5
-
4
-
ns
Set-Up Time, CE to CP
tSU
1.5
115
-
131
-
ns
3.3
12.9
-
14.7
-
ns
5
9.2
-
10.5
-
ns
Set-Up Time, U/D to CP
tSU
1.5
132
-
150
-
ns
3.3
14.7
-
16.8
-
ns
5
10.5
-
12
-
ns
Hold Time, Pn to PL
tH
1.5
22
-
25
-
ns
3.3
2.5
-
2.8
-
ns
52
-
2
-
ns
Hold Time, CE to CP
tH
1.5
0
-
0
-
ns
3.3
0
-
0
-
ns
50
-
0
-
ns
Hold Time, U/D to CP
tH
1.5
0
-
0
-
ns
3.3
0
-
0
-
ns
50
-
0
-
ns
ACT TYPES
Max. Frequency
fMAX
(Note 10)
5
(Note 9)
68
-
60
-
MHz
CP Pulse Width
tW
5
7.3
-
8.3
-
ns
PL Pulse Width
tW
5
5.3
-
6
-
ns
Recovery Time
tREC
5
5.7
-
6.5
-
ns
Set-Up Time, Pn to PL
tSU
5
3.5
-
4
-
ns
CD74AC191, CD74ACT191



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