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X74_158

Quadruple 2-to-1 Multiplexer with Common Select, Active-Low Enable, and Active-Low Outputs

XC3000
XC4000E
XC4000X
XC5200
XC9000
Spartan
SpartanXL
Virtex
Macro
Macro
Macro
Macro
Macro
Macro
Macro
N/A

figures/x4174n.gif

When the active-Low enable (G) of the X74_158 multiplexer is Low, a 4-bit word is selected from one of two sources (A3 - A0 or B3 - B0) under the control of the common select input (S). The inverse of the selected word is reflected on the active-Low outputs (Y4 - Y1). When S is Low, !A3 - !A0 appear on the outputs; when S is High, !B3 - !B0 appear on the outputs. When G is High, the outputs are High.

Inputs
Outputs
G
S
B
A
Y
1
X
X
X
1
0
1
1
X
0
0
1
0
X
1
0
0
X
1
0
0
0
X
0
1

Figure 11.14 X74_158 Implementation XC3000, XC4000, XC5200, XC9000, Spartans

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