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4-92
FAST AND LS TTL DATA
4-BIT ARITHMETIC LOGIC UNIT
The MC54/74F181 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. It is 40% faster than the Schottky ALU and only consumes 30%
as much power.
• Provides 16 Arithmetic Operations, ie, Add, Subtract, Compare,
Double, Plus Twelve Other Arithmetic Operations
• Provides all 16 Logic Operations of Two Variables, ie, Exclusive-OR,
Compare, AND, NAND, OR, NOR, Plus Ten Other Logic Operations
• Full Lookahead for High-Speed Arithmetic Operation on Long Words
CONNECTION DIAGRAM
22 21 20 19 18 17
1 2 3 4 5 6
7
24 23
8
V
CC
B
0
A
1B1A2B2
B
3
A
3
G
A
0S3S2S1S0Cn
M
9 10
11
12
F
0F1F2
GND
16 15 14 13
C
n+4
A = BP
F
3
GUARANTEED OPERATING RANGES
Symbol Parameter Min Typ Max Unit
V
CC
Supply Voltage 54, 74 4.5 5.0 5.5 V
TAOperating Ambient Temperature Range
I
OH
Output Current — High 54, 74 –1.0 mA
V
OH
Output Voltage — High
A = B output
54, 74 5.5 V
I
OL
Output Current — Low 54, 74 20 mA
MC54/74F181
4-BIT ARITHMETIC LOGIC UNIT
FAST SCHOTTKY TTL
N SUFFIX
PLASTIC
CASE 724-03
24
1
ORDERING INFORMATION
MC54/74FXXXN Plastic
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4-93
FAST AND LS TTL DATA
MC54/74F181
LOGIC SYMBOLS
VCC = PIN 24
GND = PIN 12
ACTIVE-HIGH OPERANDS
2 1 23 22 21 20 19 18
7
8
6
5
4
3
16
14
17
15
9 10 11 13
A0B0A1B1A2B2A3B
3
C
n
M
S
0
S
1
S
2
S
3
F0F1F2F
3
Cn +
4
A = B
G
P
2 1 23 22 21 20 19 18
7
8
6
5
4
3
16
14
17
15
9 10 11 13
A0B0A1B1A2B2A3B
3
C
n
M
S
0
S
1
S
2
S
3
F0F1F2F
3
Cn +
4
A = B
G
P
ACTIVE-LOW OPERANDS
CnM A
0
B
0
A
1
B1A
2
B2A
3
B
3
S
0
S
1
S
2
S
3
F
0
F
1
A = B F
2
F
3
P
Cn +
4
G