SN74F382

ARITHMETIC LOGIC UNIT/FUNCTION GENERATOR

ą

SDFS079A − D2932, MARCH 1987 − REVISED OCTOBER 1993

• Fully Parallel 4-Bit ALU in 20-Pin Package

• Ideally Suited for HIgh-Density Economical

Processors

• Ripple-Carry (Cn+4) and Overflow (OVR)

Outputs

• Arithmetic and Logic Operations Selected

Specifically to Simplify System

Implementation:

A Minus B

B Minus A

A Plus B

Five Other Functions

• Package Options Include Plastic

Small-Outline Packages and Standard

Plastic 300-mil DIPs

DW OR N PACKAGE

(TOP VIEW)

A1

B1

A0

B0

S0

S1

S2

F0

F1

GND

1

2

3

4

5

6

7

8

9

10

20 VCC

19 A2

18 B2

17 A3

16 B3

15 Cn

14 Cn+4

13 OVR

12 F3

11 F2

description

The SN74F382 is an arithmetic logic unit (ALU)/function generator that performs eight binary arithmetic/logic

operations on two 4-bit words as shown in the function table. The exclusive-OR, AND, and OR functions of the

two Boolean variables are provided without the use of external circuits. In addition, the outputs can be cleared

(low) or preset (high) as desired. The device provides a ripple-carry (Cn+4) output to ripple the carry to the

Cn input of the next stage. It detects and indicates the two’s complement overflow condition via the overflow

(OVR) output. OVR is logically equivalent to Cn+3 ⊕ Cn+4. When the SN74F382 is cascaded to handle word

lengths longer than four bits in length, only the most significant OVR is used.

The SN74F382 is characterized for operation from 0°C to 70°C.

FUNCTION TABLE

SELECTION

S2 S1 S0

ARITHMETIC/LOGIC

OPERATION

LLL

Clear

L LH

B minus A

LHL

A minus B

L HH

A plus B

HL L

A⊕B

HLH

A+B

HH L

AB

HHH

Preset

PRODUCTION DATA information is current as of publication date.

Products conform to specifications per the terms of Texas Instruments

standard warranty. Production processing does not necessarily include

testing of all parameters.

Copyright 1993, Texas Instruments Incorporated

•POST OFFICE BOX 655303 DALLAS, TEXAS 75265

•POST OFFICE BOX 1443 HOUSTON, TEXAS 77251−1443

2−1