SN54HC148, SN74HC148
8-LINE TO 3-LINE PRIORITY ENCODERS
SCLS109D – MARCH 1984 – REVISED MAY 1997
electrical characteristics over recommended operating free-air temperature range (unless
otherwise noted)
T
= 25°C
SN54HC148
SN74HC148
A
PARAMETER
TEST CONDITIONS
V
UNIT
CC
MIN
TYP
MAX
MIN
1.9
4.4
5.9
3.7
5.2
MAX
MIN
1.9
MAX
2 V
4.5 V
6 V
1.9 1.998
4.4 4.499
5.9 5.999
I
= –20 µA
4.4
OH
V
V = V or V
IH
5.9
V
OH
OL
I
IL
IL
I
I
= –4 mA
4.5 V
6 V
3.98
5.48
4.3
5.8
3.84
5.34
OH
= –5.2 mA
OH
2 V
0.002
0.001
0.001
0.17
0.1
0.1
0.1
0.1
0.1
0.1
I
= 20 µA
4.5 V
6 V
OL
V
V = V or V
0.1
0.1
0.1
V
I
IH
I
I
= 4 mA
4.5 V
6 V
0.26
0.26
±100
8
0.4
0.33
0.33
±1000
80
OL
= 5.2 mA
0.15
0.4
OL
I
I
V = V
I
or 0
6 V
±0.1
±1000
160
10
nA
µA
pF
I
CC
CC
V = V
I
or 0,
I
O
= 0
6 V
CC
C
2 V to 6 V
3
10
10
i
switching characteristics over recommended operating free-air temperature range, C = 50 pF
L
(unless otherwise noted) (see Figure 1)
T
A
= 25°C
TYP
69
23
21
60
20
17
75
25
21
78
26
22
57
19
16
66
22
19
28
8
SN54HC148
SN74HC148
FROM
(INPUT)
TO
(OUTPUT)
PARAMETER
V
UNIT
CC
MIN
MAX
180
36
MIN
MAX
270
54
MIN
MAX
225
45
2 V
4.5 V
6 V
1–7
0–7
A0, A1, or A2
31
46
38
2 V
150
30
225
45
190
38
EO
GS
4.5 V
6 V
26
38
33
2 V
190
38
285
57
240
48
4.5 V
6 V
32
48
41
t
pd
ns
2 V
195
39
295
59
245
49
A0, A1, or A2
GS
4.5 V
6 V
33
50
42
2 V
145
29
220
44
180
36
EI
4.5 V
6 V
25
38
31
2 V
165
33
250
50
205
41
EO
4.5 V
6 V
28
43
35
2 V
75
110
22
95
t
t
Any
4.5 V
6 V
15
19
ns
6
13
19
16
5
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