Philips hef4585b DATASHEETS

INTEGRATED CIRCUITS

DATA SH EET

For a complete data sheet, please also download:

•The IC04 LOCMOS HE4000B Logic
Family Specifications HEF, HEC

•The IC04 LOCMOS HE4000B Logic
Package Outlines/Information HEF, HEC

HEF4585B
MSI

4-bit magnitude comparator

Product specification
File under Integrated Circuits, IC04

January 1995

Philips Semiconductors Product specification

4-bit magnitude comparator

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
parallel inputs (A0to A3and B0to B3); A3and B3being the
most significant inputs. Three outputs are provided;
A greater than B (O
A equal to B (O
I

and I

A < B

A=B

) allow cascading of the devices without

A=B

external gates.

), A less than B (O

A > B

A < B

). Three expander inputs (I

) and

A > B

,

HEF4585B

MSI

For proper compare operation the expander inputs to the
least significant position must be connected as follows:
I

A=B=IA > B

4-bits, units can be cascaded by connecting outputs
O

A<B

significant comparator (input I
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.

and O

= HIGH, I

to the corresponding inputs of the next

A=B

= LOW. For words greater than

A < B

is connected to a

A>B

Fig.1 Functional diagram.

Fig.2 Pinning diagram.

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

PINNING

A

to A

0

3

to B

B

0

3

I

, I

A < B

, I

A > B

O
O
O

A>B
A<B
A=B

FAMILY DATA, I

word A parallel inputs
word B parallel inputs
expander inputs

A=B

A greater than B output
A less than B output
A equal to B output

LIMITS category MSI

DD

See Family Specifications

January 1995 2