Service manual

SERVICE MANUAL
Dual 4-channel Analog Multiplexer/Demultiplexer HEF4052
1. Description
The HEF4052 is a dual 4-channel analog
multiplexer/demultiplexer with common
channel select logic. Each
multiplexer/demultiplexer has four
independent inputs/outputs (Y
0
to Y
3
) and a
common input/output (Z). The common
channel select logic includes two address
inputs (A
0
and A
1
) and an active LOW enable
input (E).
Both multiplexers/demultiplexers contain four
bidirectional analog switches, each with one
side connected to an independent input/output
(Y
0
to Y
3
) and the other side connected to a
common input/output(Z).
With E LOW, one of the four switches is
selected (low impedance ON-state) by A
0
and
A
1
. With E HIGH, all switches are in the high
impedance OFF-state, independent of A
0
and
A
1
. V
DD
and Vss are the supply voltage
connections for the digital control inputs (A
0
, A
1
and E). The V
DD
to V
ss
range is 3 to 15 V. The
analog inputs/outputs (Y
0
to Y
3
, 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)
1. Block Diagrams
Y
OA
to Y
3A
Independent inputs/outputs
Y
OB
to Y
3B
Independent inputs/outputs
A
O
A
1
Address inputs
E Enable input (active LOW)
Z
A
Z
B
Common inputs/outputs
Table 6 Pinning
Family data, l
DD
LIMITS category MSI
See Family Specifications
HEF4052P (N): 16-lead DIL; plastic
(SOT38-1)
HEF4052D (F): 16-lead DIL; ceramic
(cerdip)
(SOT74)
HEF4052T (D): 16-lead SO; plastic
(SOT109-1)
( ): Package Designator North America
HEF4052
Fig. 19 Pinning Diagram
Fig. 18 Functional Diagram
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