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MM54HC148 Datasheet(PDF) 3 Page - National Semiconductor (TI)

[Old version datasheet] Texas Instruments acquired National semiconductor.
Part # MM54HC148
Description  8-3 Line Priority Encoder
PDF  6 Pages
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Manufacturer  NSC [National Semiconductor (TI)]
Direct Link  http://www.national.com
Logo NSC - National Semiconductor (TI)

MM54HC148 Datasheet(HTML) 3 Page - National Semiconductor (TI)

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AC Electrical Characteristics VCC e 5V TA e 25 C CL e 15 pF tr e tf e 6ns
Symbol
Parameter
Conditions
Typ
Units
tPHL tPLH
Maximum Propagation Delay
14
ns
Any Input to Any Output
AC Electrical Characteristics VCC e 20V to 60V CL e 50 pF tr e tf e 6 ns (unless otherwise specified)
TA e 25 C
74HC
54HC
Symbol
Parameter
VCC
b
40 Cto a85 C
b
55 Cto a125 C
Units
Typ
Guaranteed Limits
tPHL tPLH
Inputs 0 – 7
20V
140
175
210
ns
to Outputs
45V
14
28
35
42
ns
A0 A1 A2
60V
24
30
36
ns
tPHL tPLH
Inputs 0 – 7
20V
140
175
210
ns
to
45V
15
28
35
42
ns
Output EO
60V
24
30
36
ns
tPHL tPLH
Inputs 0 – 7
20V
160
200
240
ns
to
45V
17
32
40
48
ns
Output GS
60V
27
34
41
ns
tPHL tPLH
Input EI
20V
160
200
240
ns
to Outputs
45V
17
32
40
48
ns
A0 A1 A2
60V
27
34
41
ns
tPHL tPLH
Input EI
20V
100
125
150
ns
to
45V
12
20
25
30
ns
Output GS
60V
17
21
26
ns
tPHL tPLH
Input EI
20V
100
125
150
ns
to
45V
12
20
25
30
ns
Output EO
60V
17
21
26
ns
tf tr
Maximum
20V
75
95
110
ns
Output Rise
45V
7
15
19
22
ns
and Fall Time
60V
13
16
19
ns
Cpd
Power Dissipation
52
pF
Capacitance (Note 5)
Cin
Maximum Input
510
10
10
pF
Capacitance
Note 5
Cpd determines the no load dynamic power consumption and the no load dynamic current consumption
3



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