74LV251 查看數據表（PDF） - Philips Electronics
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74LV251 Datasheet PDF : 12 Pages
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Philips Semiconductors
8-input multiplexer (3-State)
Product specification
74LV251
FUNCTION TABLE
INPUTS
OUTPUTS
OE
S2
S1
S0
I0
I1
I2
I3
I4
I5
I6
I7
Y
Y
H
X
X
X
X
X
X
X
X
X
X
X
Z
Z
L
L
L
L
L
X
X
X
X
X
X
X
H
L
L
L
L
L
H
X
X
X
X
X
X
X
L
H
L
L
L
H
X
L
X
X
X
X
X
X
H
L
L
L
L
H
X
H
X
X
X
X
X
X
L
H
L
L
H
L
X
X
L
X
X
X
X
X
H
L
L
L
H
L
X
X
H
X
X
X
X
X
L
H
L
L
H
H
X
X
X
L
X
X
X
X
H
L
L
L
H
H
X
X
X
H
X
X
X
X
L
H
L
H
L
L
X
X
X
X
L
X
X
X
H
L
L
H
L
L
X
X
X
X
H
X
X
X
L
H
L
H
L
H
X
X
X
X
X
L
X
X
H
L
L
H
L
H
X
X
X
X
X
H
X
X
L
H
L
H
H
L
X
X
X
X
X
X
L
X
H
L
L
H
H
L
X
X
X
X
X
X
H
X
L
H
L
H
H
H
X
X
X
X
X
X
X
L
H
L
L
H
H
H
X
X
X
X
X
X
X
H
L
H
NOTES:
H = HIGH voltage level
L = LOW voltage level
X = don’t care
Z = high impedance OFF-state
RECOMMENDED OPERATING CONDITIONS
SYMBOL
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNIT
VCC
VI
VO
Tamb
DC supply voltage
Input voltage
Output voltage
Operating ambient temperature range in free air
See Note 1
See DC and AC
characteristics
1.0
3.3
3.6
V
0
–
VCC
V
0
–
VCC
V
–40
–40
+85
+125
°C
tr, tf
Input rise and fall times
VCC = 1.0V to 2.0V
–
–
500
VCC = 2.0V to 2.7V
–
–
200
ns/V
VCC = 2.7V to 3.6V
–
–
100
NOTE:
1. The LV is guaranteed to function down to VCC = 1.0V (input levels GND or VCC); DC characteristics are guaranteed from VCC = 1.2V to VCC = 5.5V.
1998 May 20
4
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