January 1995

2

Philips Semiconductors

Product specification

4-bit magnitude comparator

HEF4585B

MSI

DESCRIPTION

The HEF4585B is a 4-bit magnitude comparator which

compares two 4-bit words (A and B), whether they are ‘less

than’, ‘equal to’, or ‘greater than’. Each word has four

most significant inputs. Three outputs are provided;

external gates.

For proper compare operation the expander inputs to the

least significant position must be connected as follows:

4-bits, units can be cascaded by connecting outputs

HIGH).

Operation is not restricted to binary codes, the devices will

work with any monotonic code. The function table

describes the operation of the device under all possible

logic conditions.

Fig.1 Functional diagram.

PINNING

See Family Specifications

HEF4585BP(N):

16-lead DIL; plastic (SOT38-1)

HEF4585BD(F):

16-lead DIL; ceramic (cerdip) (SOT74)

HEF4585BT(D):

16-lead SO; plastic (SOT109-1)

( ): Package Designator North America

word A parallel inputs

word B parallel inputs

A greater than B output

A less than B output

A equal to B output

Fig.2 Pinning diagram.