HCF40181BM1 datasheet(3/12 Pages) STMICROELECTRONICS

Part #	HCF40181BM1

Description	4-BIT ARITHMETIC LOGIC UNIT

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Manufacturer	STMICROELECTRONICS [STMicroelectronics]

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RECOMMENDED OPERATING CONDITIONS

Symbol

Parameter

Value

Unit

VDD

Supply Voltage : HCC Types

HCF Types

3to 18

3to 15

V

VI

Input Voltage

0 to VDD

V

T op

Operating Temperature : HCC Types

HCF Types

– 55 to + 125

–40 to + 85

°C

TRUTH TABLES

Table 1.

Inputs/Outputs Active Low

Inputs/Outputs Active High

Function

Select

S 3

S2

S1

S0

Logic

Function

(M = H)

Arithmetic*

Function

(M = L, Cn =L)

Logic

Function

(M = H)

Arithmetic*

Function

(M = L, Cn =H)

0

A

A minus 1

A

0

1

AB

AB minus 1

A + B

00

10

A + B

AB minus 1

AB

A + B

0

1

Logic 1

minus 1

Logic 0

minus 1

0

1

0

A + B

A plus (A + B)

AB

A plus AB

0

1

0

1

B

AB plus (A + B)

B

(A + B) plus AB

01

10

A

B

⊕

A minus B minus 1

A

⊕ B

A minus B minus 1

0

1

A + B

AB

AB minus 1

1

0

AB

A plus (A + B)

A + B

A plus AB

10

01

A

⊕ B

A plus B

A

B

⊕

A plus B

1

0

1

0

B

AB plus (A + B)

B

(A + B) plus AB

1

0

1

A + B

AB

AB minus 1

1

0

Logic 0

A plus A

Logic 1

A plus A

1

0

1

AB

AB plus A

A + B

(A + B) plus A

1

0

AB

AB plus A

A + B

(A + B) plus A

11

A

A minus 1

* Expressed as two’s complement. For arithmetic function with Cn in the opposite state, the resulting function is as show plus 1.

1 = HIGH LEVEL.

0 = LOW LEVEL.

Table 2 : Magnitude Comparison.

Active-high D ata

Active-low Data

Input

C n

Output

C n+ 4

Magni tude

Input

C n

Output

C n+ 4

Magni tude

11

A

≤ B0

0

A

≤ B

01

A < B

1

0

A < B

10

A > B

0

1

A > B

00

A

≥ B1

1

A

≥ B

1 = HIGH LEVEL

0 = LOW LEVEL

HCC/HCF40181B

3/12

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