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MM74HC148 Datasheet(Scheda tecnica) 5 Page - Fairchild Semiconductor

Numero della parte MM74HC148
Dettagli  8-3 Line Priority Encoder
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Produttore  FAIRCHILD [Fairchild Semiconductor]
Homepage  http://www.fairchildsemi.com
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AC Electrical Characteristics
AC Electrical Characteristics
VCC = 2.0V to 6.0V, CL = 50 pF, tr = tf = 6 ns (unless otherwise specified)
Note 5: Cpd determines the no load dynamic power consumption, and the no load dynamic current consumption.
Symbol
Parameter
Conditions
Typ
Guaranteed
Limits
Units
tPHL, tPLH
Maximum Propagation Delay,
14
ns
Any Input to Any Output
Symbol
Parameter
Conditions
VCC
TA = 25°CTA = −40°C to +85°CTA = −55°C to +125°C
Units
Typ
Guaranteed Limits
tPHL, tPLH Inputs 0–7
2.0V
140
175
210
ns
to Outputs
4.5V
14
28
35
42
ns
A0, A1, A2
6.0V
24
30
36
ns
tPHL, tPLH Inputs 0–7
2.0V
140
175
210
ns
to
4.5V
15
28
35
42
ns
Output EO
6.0V
24
30
36
ns
tPHL, tPLH Inputs 0–7
2.0V
160
200
240
ns
to
4.5V
17
32
40
48
ns
Output GS
6.0V
27
34
41
ns
tPHL, tPLH Input EI
2.0V
160
200
240
ns
to Outputs
4.5V
17
32
40
48
ns
A0, A1, A2
6.0V
27
34
41
ns
tPHL, tPLH Input EI
2.0V
100
125
150
ns
to
4.5V
12
20
25
30
ns
Output GS
6.0V
17
21
26
ns
tPHL, tPLH Input EI
2.0V
100
125
150
ns
to
4.5V
12
20
25
30
ns
Output EO
6.0V
17
21
26
ns
tf, tr
Maximum
2.0V
75
95
110
ns
Output Rise
4.5V
7
15
19
22
ns
and Fall Time
6.0V
13
16
19
ns
Cpd
Power Dissipation
52
pF
Capacitance (Note 5)
Cin
Maximum Input
5
10
10
10
pF
Capacitance




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