INTEGRATED CIRCUITS
DATA SHEET
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The IC04 LOCMOS HE4000B Logic
Family Specifications HEF, HEC
•
The IC04 LOCMOS HE4000B Logic
Package Outlines/Information HEF, HEC
HEF4028B
MSI
1-of-10 decoder
Product specification
File under Integrated Circuits, IC04
January 1995
Philips Semiconductors
Product specification
1-of-10 decoder
DESCRIPTION
The HEF4028B is a 4-bit BCD to 1-of-10 active HIGH
decoder. A 1-2-4-8 BCD code applied to inputs A
0
to A
3
causes the selected output to be HIGH, the other nine will
be LOW. If desired, the device may be used as a 1-of-8
decoder with enable; 3-bit octal inputs are applied to inputs
A
0
, A
1
and A
2
selecting an output O
0
to O
7
. Input A
3
then
becomes an active LOW enable, forcing the selected
output LOW when A
3
is HIGH. The HEF4028B may also
be used as an 8-output (O
0
to O
7
) demultiplexer with A
0
to
A
2
as address inputs and A
3
as an active LOW data input.
The outputs are fully buffered for best performance.
HEF4028B
MSI
Fig.1 Functional diagram.
HEF4028BP(N):
HEF4028BD(F):
HEF4028BT(D):
16-lead DIL; plastic
(SOT38-1)
16-lead DIL; ceramic (cerdip)
(SOT74)
16-lead SO; plastic
(SOT109-1)
( ): Package Designator North America
PINNING
Fig.2 Pinning diagram.
A
0
to A
3
O
0
to O
9
address inputs, 1-2-4-8 BCD
outputs (active HIGH)
FAMILY DATA, I
DD
LIMITS category MSI
See Family Specifications
January 1995
2
Microcontroller MCU
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