MC74VHC157 Datasheet, PDF (2/7 Pages) Motorola, Inc – Quad 2-Channel Multiplexer

NIBBLE
INPUTS
E
S
2
A0
3
B0
A1 ⁵
B1 ⁶
11
A2
10
B2
A3 ¹⁴
B3 ¹³
15
1
MC74VHC157
4 _Y0
7 _Y1
9 _Y2
DATA
OUTPUTS
12 _Y3
Figure 2. Expanded Logic Diagram
E ¹⁵
S1
A0 ²
B0 ³
A1 ⁵
B1 ⁶
A2 ¹¹
B2 ¹⁰
A3 ¹⁴
B3 ¹³
EN
G1
1 ^MUX
1
4 _Y0
7 _Y1
9 _Y2
12 _Y3
Figure 3. IEC Logic Symbol
FUNCTION TABLE
Inputs
Outputs
E
S Y0 -- Y3
H
X
L
L
L
A0--A3
L
H B0--B3
A0 -- A3, B0 -- B3 = the levels
of the respective Data--Word
Inputs.
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