8-channel analogue multiplexer/demultiplexer
The HEF4051B is an 8-channel
with three address inputs (A0 to A2),
an active LOW enable input (E), eight
independent inputs/outputs (Y0 to Y7)
and a common input/output (Z).
The device contains eight
bidirectional analogue switches, each
with one side connected to an
independent input/output (Y0 to Y7)
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 A0 to A2. With E HIGH,
all switches are in the high impedance
OFF-state, independent of A0 to A2.
VDD and VSS are the supply voltage
connections for the digital control
inputs (A0 to A2, and E).
The VDD to VSS range is 3 to 15 V.
The analogue inputs/outputs (Y0 to
Y7, and Z) can swing between VDD as
a positive limit and VEE as a negative
limit. VDD−VEE may not exceed 15 V.
For operation as a digital
multiplexer/demultiplexer, VEE is
connected to VSS (typically ground).
Fig.1 Functional diagram.
Fig.2 Pinning diagram.
HEF4051BP(N): 16-lead DIL; plastic
HEF4051BD(F): 16-lead DIL; ceramic
HEF4051BT(D): 16-lead SO; plastic
( ): Package Designator North America
Y0 to Y7
A0 to A2
enable input (active LOW)
FAMILY DATA, IDD LIMITS category MSI
See Family Specifications.