參數(shù)資料
型號: MM74HC148
廠商: Fairchild Semiconductor Corporation
英文描述: 8-3 Line Priority Encoder
中文描述: 8-3線優(yōu)先編碼器
文件頁數(shù): 5/8頁
文件大小: 77K
代理商: MM74HC148
5
www.fairchildsemi.com
M
AC Electrical Characteristics
AC Electrical Characteristics
V
CC
= 2.0V to 6.0V, C
L
= 50 pF, t
r
= t
f
= 6 ns (unless otherwise specified)
Note 5:
C
pd
determines the no load dynamic power consumption, and the no load dynamic current consumption.
Symbol
Parameter
Conditions
Typ
Guaranteed
Limits
Units
t
PHL
, t
PLH
Maximum Propagation Delay,
14
ns
Any Input to Any Output
Symbol
Parameter
Conditions
V
CC
T
A
=
25
°
C
Typ
T
A
=
40
°
C to
+
85
°
C T
A
=
55
°
C to
+
125
°
C
Guaranteed Limits
175
35
30
Units
t
PHL
, t
PLH
Inputs 0–7
2.0V
4.5V
6.0V
140
28
24
210
42
36
ns
ns
ns
to Outputs
A0, A1, A2
14
t
PHL
, t
PLH
Inputs 0–7
2.0V
4.5V
6.0V
140
28
24
175
35
30
210
42
36
ns
ns
ns
to
Output EO
15
t
PHL
, t
PLH
Inputs 0–7
2.0V
4.5V
6.0V
160
32
27
200
40
34
240
48
41
ns
ns
ns
to
Output GS
17
t
PHL
, t
PLH
Input EI
2.0V
4.5V
6.0V
160
32
27
200
40
34
240
48
41
ns
ns
ns
to Outputs
A0, A1, A2
17
t
PHL
, t
PLH
Input EI
2.0V
4.5V
6.0V
100
20
17
125
25
21
150
30
26
ns
ns
ns
to
Output GS
12
t
PHL
, t
PLH
Input EI
2.0V
4.5V
6.0V
100
20
17
125
25
21
150
30
26
ns
ns
ns
to
Output EO
12
t
f
, t
r
Maximum
Output Rise
and Fall Time
2.0V
4.5V
6.0V
75
15
13
95
19
16
110
22
19
ns
ns
ns
7
C
pd
Power Dissipation
Capacitance (Note 5)
Maximum Input
52
pF
C
in
5
10
10
10
pF
Capacitance
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MM74HC148MTC 制造商:FAIRCHILD 制造商全稱:Fairchild Semiconductor 功能描述:8-3 Line Priority Encoder
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