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54F191 Datasheet(PDF) 5 Page - National Semiconductor (TI)

[Old version datasheet] Texas Instruments acquired National semiconductor.
Part No. 54F191
Description  Up/Down Binary Counter with Preset and Ripple Clock
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Manufacturer  NSC [National Semiconductor (TI)]
Direct Link  http://www.national.com
Logo NSC - National Semiconductor (TI)

54F191 Datasheet(HTML) 5 Page - National Semiconductor (TI)

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AC Electrical Characteristics
74F
54F
74F
TA ea25 C
TA VCC e Mil
TA VCC e Com
Symbol
Parameter
VCC ea50V
CL e 50 pF
CL e 50 pF
Units
CL e 50 pF
Min
Typ
Max
Min
Max
Min
Max
fmax
Maximum Count Frequency
100
125
75
90
MHz
tPLH
Propagation Delay
30
55
75
30
95
30
85
tPHL
CP to Qn
50
85
110
50
135
50
120
ns
tPLH
Propagation Delay
60
100
130
60
165
60
140
tPHL
CP to TC
50
85
110
50
135
50
120
tPLH
Propagation Delay
30
55
75
30
95
30
85
tPHL
CP to RC
30
50
70
30
90
30
80
ns
tPLH
Propagation Delay
30
50
70
30
90
30
80
tPHL
CE to RC
30
55
70
30
90
30
80
tPLH
Propagation Delay
70
110
180
70
220
70
200
tPHL
U D to RC
55
90
120
55
140
55
130
ns
tPLH
Propagation Delay
40
70
100
40
135
40
110
tPHL
U D to TC
40
65
100
40
125
40
110
tPLH
Propagation Delay
30
45
70
30
90
30
80
ns
tPHL
Pn to Qn
60
100
130
60
160
60
140
tPLH
Propagation Delay
50
85
110
50
130
50
120
ns
tPHL
PL to Qn
55
90
120
55
145
55
130
tPLH
Propagation Delay
50
140
50
150
ns
tPHL
Pn to TC
65
130
60
140
tPLH
Propagation Delay
65
190
65
200
ns
tPHL
Pn to RC
60
140
60
150
tPLH
Propagation Delay
80
165
80
175
ns
tPHL
PL to TC
60
135
60
145
tPLH
Propagation Delay
100
200
100
210
ns
tPHL
PL to RC
90
155
90
160
5


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