Philips Semiconductors
Product specification
8-channel analogue multiplexer/demultiplexer
DESCRIPTION
The HEF4051B is an 8-channel
analogue multiplexer/demultiplexer
with three address inputs (A
0
to A
2
),
an active LOW enable input (E), eight
independent inputs/outputs (Y
0
to Y
7
)
and a common input/output (Z).
The device contains eight
bidirectional analogue switches, each
with one side connected to an
independent input/output (Y
0
to Y
7
)
and the other side connected to a
common input/output (Z).
With E LOW, one of the eight
switches is selected (low impedance
ON-state) by A
0
to A
2
. With E HIGH,
all switches are in the high impedance
OFF-state, independent of A
0
to A
2
.
V
DD
and V
SS
are the supply voltage
connections for the digital control
inputs (A
0
to A
2
, and E).
The V
DD
to V
SS
range is 3 to 15 V.
HEF4051B
MSI
The analogue inputs/outputs (Y
0
to
Y
7
, 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).
Fig.2 Pinning diagram.
HEF4051BP(N):
HEF4051BD(F):
16-lead DIL; plastic
(SOT38-1)
16-lead DIL; ceramic
(cerdip)
(SOT74)
16-lead SO; plastic
(SOT109-1)
HEF4051BT(D):
( ): Package Designator North America
PINNING
Y
0
to Y
7
A
0
to A
2
E
Z
independent inputs/outputs
address inputs
enable input (active LOW)
common input/output
FAMILY DATA, I
DD
LIMITS category MSI
Fig.1 Functional diagram.
See Family Specifications.
January 1995
2
PHILIPS [ NXP SEMICONDUCTORS ]
