HEF4585B データシートの表示（PDF） - Philips Electronics

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HEF4585B

4-bit magnitude comparator

Philips Electronics 

Philips Semiconductors

4-bit magnitude comparator

Product specification

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

parallel inputs (A0 to A3 and B0 to B3); A3 and B3 being the

most significant inputs. Three outputs are provided;

A greater than B (OA > B), A less than B (OA < B) and

A equal to B (OA = B). Three expander inputs (IA > B,

IA < B and IA = B) allow cascading of the devices without

external gates.

For proper compare operation the expander inputs to the

least significant position must be connected as follows:

IA = B = IA > B = HIGH, IA < B = LOW. For words greater than

4-bits, units can be cascaded by connecting outputs

OA < B and OA = B to the corresponding inputs of the next

significant comparator (input IA > B is connected to a

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.

January 1995

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

A0 to A3

B0 to B3

IA > B, IA < B, IA = B

OA > B

OA < B

OA = B

word A parallel inputs

word B parallel inputs

expander inputs

A greater than B output

A less than B output

A equal to B output

FAMILY DATA, IDD LIMITS category MSI

See Family Specifications

2

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