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74AC191 Datasheet(PDF) 6 Page - Fairchild Semiconductor

Part No. 74AC191
Description  Up/Down Counter with Preset and Ripple Clock
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Manufacturer  FAIRCHILD [Fairchild Semiconductor]
Direct Link  http://www.fairchildsemi.com
Logo FAIRCHILD - Fairchild Semiconductor

74AC191 Datasheet(HTML) 6 Page - Fairchild Semiconductor

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6
AC Operating Requirements
Note 7: Voltage Range 3.3 is 3.3V
± 0.3V
Voltage Range 5.0 is 5.0V
± 0.5V
Capacitance
VCC
TA = +25°CTA = −40°C to +85°C
Symbol
Parameter
(V)
C L = 50 pF
CL = 50 pF
Units
(Note 7)
Typ
Guaranteed Minimum
tS
Setup Time, HIGH or LOW
3.3
1.0
3.0
3.0
ns
Pn to PL
5.0
0.5
2.0
2.5
tH
Hold Time, HIGH or LOW
3.3
−1.5
0.5
1.0
ns
Pn to PL
5.0
−0.5
1.0
1.0
tS
Setup Time, LOW
3.3
3.0
6.0
7.0
ns
CE to CP
5.0
1.5
4.0
4.5
tH
Hold Time, LOW
3.3
−4.0
−0.5
−0.5
ns
CE to CP
5.0
−2.5
0
0
tS
Setup Time, HIGH or LOW
3.3
4.0
8.0
9.0
ns
U/D to CP
5.0
2.5
5.5
6.5
tH
Hold Time, HIGH or LOW
3.3
−5.0
0
0
ns
U/D to CP
5.0
−3.0
0.5
0.5
tW
PL Pulse Width, LOW
3.3
2.0
3.5
4.0
ns
5.0
1.0
1.0
1.0
tW
CP Pulse Width, LOW
3.3
2.0
3.5
4.0
ns
5.0
2.0
3.0
4.0
trec
Recovery Time
3.3
−0.5
0
0
ns
PL to CP
5.0
−1.0
0
0
Symbol
Parameter
Typ
Units
Conditions
CIN
Input Capacitance
4.5
pF
VCC = OPEN
CPD
Power Dissipation Capacitance
75.0
pF
VCC = 5.0V


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