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SDFS079A − D2932, MARCH 1987 − REVISED OCTOBER 1993
DW OR N PACKAGE
(TOP VIEW)
• Fully Parallel 4-Bit ALU in 20-Pin Package
• Ideally Suited for HIgh-Density Economical
Processors
A1
B1
V
CC
19 A2
1
2
3
4
5
6
7
8
9
10
20
• Ripple-Carry (C
) and Overflow (OVR)
n+4
Outputs
A0
18 B2
• Arithmetic and Logic Operations Selected
Specifically to Simplify System
Implementation:
17
16
15
14
13
12
11
B0
S0
S1
S2
F0
F1
GND
A3
B3
C
C
n
A Minus B
B Minus A
A Plus B
Five Other Functions
n+4
OVR
F3
F2
• Package Options Include Plastic
Small-Outline Packages and Standard
Plastic 300-mil DIPs
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 (C
) output to ripple the carry to the
n+4
C
input of the next stage. It detects and indicates the two’s complement overflow condition via the overflow
n
(OVR) output. OVR is logically equivalent to C
⊕ C
. When the SN74F382 is cascaded to handle word
n+3
n+4
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
ARITHMETIC/LOGIC
OPERATION
S2
L
S1
L
S0
L
Clear
B minus A
A minus B
A plus B
A ⊕ B
L
L
H
L
L
H
H
L
L
H
L
H
H
H
H
L
H
L
A + B
H
H
AB
H
Preset
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Copyright 1993, Texas Instruments Incorporated
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ꢠ ꢤ ꢡ ꢠꢙ ꢚꢮ ꢜꢛ ꢟ ꢧꢧ ꢥꢟ ꢝ ꢟ ꢞ ꢤ ꢠ ꢤ ꢝ ꢡ ꢩ
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2−1
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