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参数资料
| 型号： | SN54HC251FK |
| 厂商： | Texas Instruments, Inc. |
| 英文描述： | 300kHz Switching Regulator with 700V / 1.5A Switch and 500V Maximum Startup; Package: SOIC Wide 16 Minus Pins 2, 14, 15; No of Pins: 13; Container: Rail; Qty per Container: 47 |
| 中文描述： | 数据选择器/多路复用3态输出 |
| 文件页数： | 5/17页 |
| 文件大小： | 492K |
| 代理商： | SN54HC251FK |
SCLS132E DECEMBER 1982 REVISED SEPTEMBER 2003
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
TYP
1.998
SN54HC251
MIN
1.9
SN74HC251
MIN
1.9
UNIT
MIN
1.9
MAX
MAX
MAX
2 V
IOH = 20
μ
A
4.5 V
4.4
4.499
4.4
4.4
VOH
VI = VIH or VIL
6 V
5.9
5.999
5.9
5.9
V
IOH = 6 mA
IOH = 7.8 mA
4.5 V
3.98
4.3
3.7
3.84
6 V
5.48
5.8
5.2
5.34
2 V
0.002
0.1
0.1
0.1
IOL = 20
μ
A
4.5 V
0.001
0.1
0.1
0.1
VOL
VI = VIH or VIL
6 V
0.001
0.1
0.1
0.1
V
IOL = 6 mA
IOL = 7.8 mA
4.5 V
0.17
0.26
0.4
0.33
6 V
0.15
±
0.1
±
0.01
0.26
±
100
±
0.5
0.4
0.33
±
1000
II
IOZ
ICC
Ci
VI = VCC or 0
VO = VCC or 0,
VI = VCC or 0,
6 V
±
1000
±
10
160
nA
μ
A
μ
A
pF
VI = VIH or VIL
IO = 0
6 V
±
5
80
6 V
8
2 V to 6 V
3
10
10
10
switching characteristics over recommended operating free-air temperature range, C
L
= 50 pF
(unless otherwise noted) (see Figure 1)
PARAMETER
FROM
(INPUT)
TO
VCC
TA = 25
°
C
TYP
SN54HC251
MIN
SN74HC251
MIN
UNIT
(OUTPUT)
MIN
MAX
205
MAX
300
MAX
256
2 V
58
A, B, or C
W or Y
4.5 V
21
41
60
51
tpd
6 V
19
35
51
44
ns
2 V
44
195
283
244
Any D
W or Y
4.5 V
17
39
57
49
6 V
15
33
48
41
2 V
30
145
210
181
ten
OE
W or Y
4.5 V
10
29
42
36
ns
6 V
9
25
36
31
2 V
25
195
283
244
tdis
OE
W or Y
4.5 V
15
39
57
49
ns
6 V
14
33
48
41
2 V
20
75
110
95
tt
W or Y
4.5 V
6 V
8
6
15
13
22
19
19
16
ns
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