HEF4028BF datasheet(2/5 Pages) PHILIPS

2 / 5 page

January 1995

Philips Semiconductors

Product speciﬁcation

1-of-10 decoder

HEF4028B

MSI

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 A0 to A3

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

A0, A1 and A2 selecting an output O0 to O7. Input A3 then

becomes an active LOW enable, forcing the selected

output LOW when A3 is HIGH. The HEF4028B may also

be used as an 8-output (O0 to O7) demultiplexer with A0 to

A2 as address inputs and A3 as an active LOW data input.

The outputs are fully buffered for best performance.

Fig.1 Functional diagram.

Fig.2 Pinning diagram.

PINNING

FAMILY DATA, IDD LIMITS category MSI

See Family Specifications

HEF4028BP(N):

16-lead DIL; plastic

(SOT38-1)

HEF4028BD(F):

16-lead DIL; ceramic (cerdip)

(SOT74)

HEF4028BT(D):

16-lead SO; plastic

(SOT109-1)

( ): Package Designator North America

A0 to A3

address inputs, 1-2-4-8 BCD

O0 to O9

outputs (active HIGH)

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