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74ALS251D 数据表(PDF) 3 Page - NXP Semiconductors

部件名 74ALS251D
功能描述  8-input multiplexer 3-State
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制造商  PHILIPS [NXP Semiconductors]
网页  http://www.nxp.com
标志 PHILIPS - NXP Semiconductors

74ALS251D 数据表(HTML) 3 Page - NXP Semiconductors

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Philips Semiconductors
Product specification
74ALS251
8-input multiplexer (3-State)
1991 Feb 08
3
LOGIC DIAGRAM
VCC = Pin 16
GND = Pin 8
SC00069
I0
I1
I2
I3
I4
I5
I6
I7
4
3
2
1
15
14
13
12
S2
S1
S0
OE
9
10
11
7
56
YY
FUNCTION TABLE
INPUTS
OUTPUTS
S2
S1
S0
OE
Y
Y
X
X
X
H
Z
Z
L
L
L
L
I0
I0
L
L
H
L
I1
I1
L
H
L
L
I2
I2
L
H
H
L
I3
I3
H
L
L
L
I4
I4
H
L
H
L
I5
I5
H
H
L
L
I6
I6
H
H
H
L
I7
I7
H = High voltage level
L
= Low voltage level
X = Don’t care
Z = High impedance “off” state
ABSOLUTE MAXIMUM RATINGS
(Operation beyond the limit set forth in this table may impair the useful life of the device.
Unless otherwise noted these limits are over the operating free air temperature range.)
SYMBOL
PARAMETER
RATING
UNIT
VCC
Supply voltage
–0.5 to +7.0
V
VIN
Input voltage
–0.5 to +7.0
V
IIN
Input current
–30 to +5
mA
VOUT
Voltage applied to output in High output state
–0.5 to VCC
V
IOUT
Current applied to output in Low output state
48
mA
Tamb
Operating free-air temperature range
0 to +70
°C
Tstg
Storage temperature range
–65 to +150
°C
RECOMMENDED OPERATING CONDITIONS
SYMBOL
PARAMETER
LIMITS
UNIT
SYMBOL
PARAMETER
MIN
NOM
MAX
UNIT
VCC
Supply voltage
4.5
5.0
5.5
V
VIH
High-level input voltage
2.0
V
VIL
Low-level input voltage
0.8
V
IIK
Input clamp current
–18
mA
IOH
High-level output current
–2.6
mA
IOL
Low-level output current
24
mA
Tamb
Operating free-air temperature range
0
+70
°C


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