SERVICE MANUAL
Triple 2-channel Analog Multiplexer/Demultiplexer HEF4053
1.
Description
The HEF4053 is a triple 2-channel analog
multiplexer/demultiplexer with a common
enable input (E). Each
multiplexer/demultiplexer has two independent
inputs/outputs (Y
0
and Y
1
), a common
input/output (Z), and select inputs (Sn). Each
also contains two-bidirectional analog
switches, each with one side connected to an
independent input/output (Y
0
and Y
1
) and the
other side connected to a common
input/output(Z).
With (E) LOW, one of the two switches is
selected all switches are in the high
impedance OFF-state, independent of S
A
to
S
C
.
V
DD
and V
SS
are the supply voltage
connections for the digital control inputs (S
A
to
S
C
and E).
The V
DD
to V
SS
range is 3 to 15V. The analog
inputs/outputs (Y
0
, Y
1
and Z) can swing
between V
DD
as a positive limit and V
EE
as a
negative limit. V
DD
-V
EE
may not exceed 15 V.
For operation as a digital multiplexer/
demultiplexer, V
EE
is connected to V
SS
(typically ground).
(low impedance ON-state) by Sn. With E HIGH,
2. Block Diagram
Fig. 21 Functional Diagram
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