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參數(shù)資料
| 型號(hào)： | SN54HC148WR |
| 廠商： | TEXAS INSTRUMENTS INC |
| 元件分類： | 算術(shù)邏輯單元 |
| 英文描述： | HC/UH SERIES, 8-BIT ENCODER, CDFP16 |
| 封裝： | CERAMIC, DFP-16 |
| 文件頁(yè)數(shù)： | 7/11頁(yè) |
| 文件大?。?/td> | 215K |
| 代理商： | SN54HC148WR |
SN54HC148, SN74HC148
8-LINE TO 3-LINE PRIORITY ENCODERS
SCLS109D – MARCH 1984 – REVISED MAY 1997
5
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
electrical characteristics over recommended operating free-air temperature range (unless
otherwise noted)
PARAMETER
TEST CONDITIONS
VCC
TA = 25°C
SN54HC148
SN74HC148
UNIT
PARAMETER
TEST CONDITIONS
VCC
MIN
TYP
MAX
MIN
MAX
MIN
MAX
UNIT
2 V
1.9
1.998
1.9
IOH = –20 A
4.5 V
4.4
4.499
4.4
VOH
VI = VIH or VIL
6 V
5.9
5.999
5.9
V
IOH = –4 mA
4.5 V
3.98
4.3
3.7
3.84
IOH = –5.2 mA
6 V
5.48
5.8
5.2
5.34
2 V
0.002
0.1
IOL = 20 A
4.5 V
0.001
0.1
VOL
VI = VIH or VIL
6 V
0.001
0.1
V
IOL = 4 mA
4.5 V
0.17
0.26
0.4
0.33
IOL = 5.2 mA
6 V
0.15
0.26
0.4
0.33
II
VI = VCC or 0
6 V
±0.1
±100
±1000
nA
ICC
VI = VCC or 0,
IO = 0
6 V
8
160
80
A
Ci
2 V to 6 V
3
10
pF
switching characteristics over recommended operating free-air temperature range, CL = 50 pF
(unless otherwise noted) (see Figure 1)
PARAMETER
FROM
TO
VCC
TA = 25°C
SN54HC148
SN74HC148
UNIT
PARAMETER
(INPUT)
(OUTPUT)
VCC
MIN
TYP
MAX
MIN
MAX
MIN
MAX
UNIT
2 V
69
180
270
225
1–7
A0, A1, or A2
4.5 V
23
36
54
45
6 V
21
31
46
38
2 V
60
150
225
190
EO
4.5 V
20
30
45
38
07
6 V
17
26
38
33
0–7
2 V
75
190
285
240
GS
4.5 V
25
38
57
48
t d
6 V
21
32
48
41
ns
tpd
2 V
78
195
295
245
ns
A0, A1, or A2
4.5 V
26
39
59
49
6 V
22
33
50
42
2 V
57
145
220
180
EI
GS
4.5 V
19
29
44
36
6 V
16
25
38
31
2 V
66
165
250
205
EO
4.5 V
22
33
50
41
6 V
19
28
43
35
2 V
28
75
110
95
tt
Any
4.5 V
8
15
22
19
ns
6 V
6
13
19
16
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