Fairchild Semiconductor 74LVQ151SJX, 74LVQ151SJ, 74LVQ151SCX, 74LVQ151SC Datasheet
74LVQ151
Low Voltage 8-Input Multiplexer
General Description
The LVQ151 is a high-speed 8-input digital multiplexer. It
provides, in one package, the ability to select one line of data
from up to eight sources. The LVQ151can be used as a universal function generator to generate any logic function of
four variables. Both true and complementary outputs are
provided.
Features
n Ideal for low power/low noise 3.3V applications
n Guaranteed simultaneous switching noise level and
dynamic threshold performance
n Guaranteed pin-to-pin skew AC performance
n Guaranteed incident wave switching into 75Ω
Ordering Code:
Order Number Package Number Package Description
74LVQ151SC M16A 16-Lead (0.150" Wide) Small Outline Integrated Circuit, SOIC JEDEC
74LVQ151SJ M16D 16-Lead Molded Small Outline Package, SOIC EIAJ
Devices also available in Tape and Reel. Specify by appending suffix letter “X” to the ordering code.
Logic Symbols
Connection Diagram
Pin Descriptions
Pin
Names
Description
I
0–I7
Data Inputs
S
0–S2
Select Inputs
E
Enable Input
Z Data Output
Z
Inverted Data Output
DS011351-1
IEEE/IEC
DS011351-4
Pin Assignment
SOIC JEDEC and EIAJ
DS011351-2
May 1998
74LVQ151 Low Voltage 8-Input Multiplexer
© 1998 Fairchild Semiconductor Corporation DS011351 www.fairchildsemi.com
Truth Table
Inputs Outputs
E
S
2
S
1
S
0
Z Z
HXXXHL
LLLLI
0
I
0
LL L HI1I
1
LLHLI2I
2
LLHHI3I
3
LH L L I4I
4
LHLHI5I
5
LHH L I6I
6
LHHHI7I
7
H=HIGH Voltage Level
L=LOW Voltage Level
X=Immaterial
Functional Description
The LVQ151 is a logic implementation of a single pole,
8-position switch with the switch position controlled by the
state of three Select inputs, S
0,S1,S2
. Both true and
complementary outputs are provided. The Enable input (E) is
active LOW. When it is not activated, the complementary
output is HIGH and the true output is LOW regardless of all
other inputs. The logic function provided at the output is:
Z=E
•
(I
0
•
S
0
•
S
1
•
S2+I
1
•
S
0
•
S
1
•
S2+
I
2
•
S
0
•
S
1
•
S2+I
3
•
S
0
•
S
1
•
S2+
I
4
•
S
0
•
S
1
•
S2+I
5
•
S
0
•
S
1
•
S2+
I
6
•
S
0
•
S
1
•
S2+I
7
•
S
0
•
S
1
•
S2)
The LVQ151 provides the ability, in one package to select
from eight sources of data or control information. By proper
manipulation of the inputs, the LVQ151can provide any logic
function of four variables and its complement.
Logic Diagram
DS011351-5
Please note that this diagram is provided only for the understanding of logic operations and should not be used to estimate propagation delays.
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