NSC DM74LS181N, DM54LS181W, DM54LS181J Datasheet

DM54LS181/DM74LS181
4-Bit Arithmetic Logic Unit

DM54LS181/DM74LS181 4-Bit Arithmetic Logic Unit

June 1992

General Description

The ’LS181 is a 4-bit Arithmetic Logic Unit (ALU) which can
perform all the possible 16 logic operations on two variables
and a variety of arithmetic operations.

Connection Diagram

Dual-In-Line Package

Order Number DM54LS181J, DM54LS181W or DM74LS181N

See NS Package Number J24A, N24A or W24C

Features

Y

Provides 16 arithmetic operations: add, subtract, com­pare, double, plus twelve other arithmetic operations

Y

Provides all 16 logic operations of two variables: exclu­sive-OR, compare, AND, NAND, OR, NOR, plus ten
other logic operations

Y

Full lookahead for high speed arithmetic operation on
long words

TL/F/9821– 1

Pin Names Description

A0–A3 Operand Inputs (Active LOW)
B

0–B3 Operand Inputs (Active LOW)
S0–S3 Function Select Inputs
M Mode Control Input
C

n

F

0–F3 Function Outputs (Active LOW)
AeB Comparator Output
G
P
C

na4

C

1995 National Semiconductor Corporation RRD-B30M115/Printed in U. S. A.

TL/F/9821

Carry Input

Carry Generate Output (Active LOW)
Carry Propagate Output (Active LOW)
Carry Output

Absolute Maximum Ratings (Note)

Supply Voltage 7V

Input Voltage 7V

Operating Free Air Temperature Range

DM74LS 0

Storage Temperature Range

Ctoa70§C

§

b

65§Ctoa150§C

The ‘‘Absolute Maximum Ratings’’ are those values

Note:

beyond which the safety of the device cannot be guaran­teed. The device should not be operated at these limits. The
parametric values defined in the ‘‘Electrical Characteristics’’
table are not guaranteed at the absolute maximum ratings.
The ‘‘Recommended Operating Conditions’’ table will define
the conditions for actual device operation.

Recommended Operating Conditions

Symbol Parameter

V

CC

V

IH

V

IL

I

OH

I

OL

T

A

Supply Voltage 4.5 5.5 4.75 5 5.25 V

High Level Input Voltage 2 2 V

Low Level Input Voltage 0.7 0.8 V

High Level Output Current

Low Level Output Current 4 8 mA

Free Air Operating Temperature

DM54LS181 DM74LS181

Min Max Min Nom Max

b

0.4

b

55 125 0 70

b

0.4 mA

Electrical Characteristics over recommended operating free air temperature range (unless otherwise noted)

Symbol Parameter Conditions Min

e

V

I

V

OH

V

OL

I

I

I

IH

I

IL

I

OS

I

CC

Input Clamp Voltage V

High Level Output V

Voltage V

Low Level Output V
Voltage V

Input Current@Max V
Input Voltage V

High Level Input Current V

Low Level Input Current V

Short Circuit V
Output Current (Note 2)

Supply Current V

CC

CC

e

IL

CC

e

IH

e

I

OL

CC

e

I

CC

CC

CC

CC

Sn,M,A

e

Note 1: All typicals are at V

Note 2: Not more than one output should be shorted at a time, and the duration should not exceed one second.

CC

5V, T

e

25§C.

A

eb

e

Min, I

Min, I

18 mA

I

e

Max, DM54 2.5

OH

Max DM74 2.7

e

e

10V (DM54) An,B

e

e

e

e

e

Min, I

Min

4 mA, V

Max, V

Max, V

Max, V

Max

Max, Bn,C

n

Max, DM54 0.4

OL

DM74 0.35 0.5

e

Min DM74 0.25 0.4

CC

e

7V M input 0.1

I

e

2.7V M input 20

I

e

0.4V M input

I

e

GND DM54 35

n

e

4.5V DM74 37

S
C

A
S
C

A
S
C

n

n

n

n,Bn

n

n

n,Bn

n

n

b

20

Typ

(Note 1)

Max Units

b

1.5 V

0.3

0.4

0.5

60
80

100

b

0.4

b

1.2

b

1.6

b

2.0

b

100 mA

Units

C

§

mA

mA

mA

mA

V

V

2

Switching Characteristics:

Symbol Parameter Conditions C

t
t

t
t

t
t

t
t

t
t

t
t

t
t

t
t

t
t

t
t

t
t

t
t

PLH

PHL

PLH

PHL

PLH

PHL

PLH

PHL

PLH

PHL

PLH

PHL

PLH

PHL

PLH

PHL

PLH

PHL

PLH

PHL

PLH

PHL

PLH

PHL

Propagation Delay MeGND 27
Cnto C

na4

Propagation Delay MeGND 26
Cnto F 20

Propagation Delay M, S1,S
A or B to G (Sum) S1,S

Propagation Delay M, S0,S
A or B to G (Diff) S1,S

Propagation Delay M, S1,S
A or B to P (Sum) S0,S

Propagation Delay M, S0,S
A or B to P (Diff) S1,S

Propagation Delay M, S1,S
Aior Bito Fi(Sum) S0,S

Propagation Delay M, S0,S
Aior Bito Fi(Diff) S1,S

e

GND; 29

2

e

4.5V 23

3

e

GND; 32

3

e

4.5V 26

2

e

GND; 30

2

e

4.5V 30

3

e

GND; 30

3

e

4.5V 33

2

e

GND; 32

2

e

4.5V 25

3

e

GND; 32

3

e

4.5V 33

2

Propagation Delay Me4.5V 33
A or B to F (Logic) 29

Propagation Delay M, S1,S
A or B to C

(Sum) S0,S

na4

Propagation Delay M, S0,S
A or B to C

(Diff) S1,S

na4

Propagation Delay M, S0,S
A or B to AeBS

R

e

GND; 38

2

e

4.5V 38

3

e

GND; 41

3

e

4.5V 41

2

e

GND; 50

3

e

,S

4.5V; 62

1

2

e

2kXto 5.0V

L

DM54/DM74LS

e

15 pF Units

L

Min Max

20

ns

ns

ns

ns

ns

ns

ns

ns

ns

ns

ns

ns

3