74F181 Datasheet, PDF (1/9 Pages) NXP Semiconductors – Arithmetic logic unit

Philips Semiconductors FAST Products
Arithmetic logic unit
Product specification
74F181
FEATURES
• Provides 16 arithmetic operation: add, subtract, compare, and
double; plus 12 other arithmetic operations
• Provides all 16 logic operations of two variables: Exclusive-OR,
Compare, AND, NAND, NOR, OR, plus 10 other logic operations
• Full look-ahead carry for high speed arithmetic operation on long
words
• 40% faster than ’S181 with only 30% ’S181 power consumption
• Available in 300mil-wide Slim 24-pin Dual In-Line package
DESCRIPTION
The 74F181 is a 4-bit high-speed parallel Arithmetic Logic Unit
(ALU). Controlled by the four Function Select inputs (S0–S3) and
the Mode Control input (M), it can perform all the 16 possible logic
operations or 16 different arithmetic operations on active-High or
active-Low operands. The Function Table lists these operations.
PIN CONFIGURATION
B0 ¹
A0 ²
S3 ³
S2 ⁴
S1 ⁵
S0 ⁶
Cn ⁷
M8
F0 ⁹
F1 ¹⁰
F2 ¹¹
GND 12
24 V_CC
23 _A1
22 _B1
21 _A2
20 _B2
19 _A3
18 _B3
17 _G
16 _Cn+4
15 _P
14 _A=B
13 _F3
SF00193
TYPE
74F181
TYPICAL PROPAGATION DELAY
7.0ns
TYPICAL
SUPPLY CURRENT
(TOTAL)
43mA
ORDERING INFORMATION
DESCRIPTION
24-Pin Plastic Slim DIP (300 mil)
24-Pin Plastic SOL
COMMERCIAL RANGE
V_CC = 5V ±10%, T_amb = 0°C to +70°C
N74F181N
N74F181D
INPUT AND OUTPUT LOADING AND FAN-OUT TABLE
PINS
DESCRIPTION
74F (U.L.) HIGH/LOW
A0–A3
A operand inputs
1.0/3.0
B0–B3
B operand inputs
1.0/3.0
M
Mode control input
1.0/1.0
S0–S3
Function select input
1.0/4.0
Cn
Carry input
1.0/5.0
C_n+4
P
Carry output
Carry Propagate output
50/33
50/33
G
Carry Generate output
50/33
A=B
Compare output
OC/33
F0–F3
Outputs
50/33
NOTE: One (1.0) FAST unit load is defined as: 20µA in the High state and 0.6mA in the Low state.
OC = Open Collector
LOAD VALUE HIGH/LOW
20µA/1.8mA
20µA/1.8mA
20µA/0.6mA
20µA/2.4mA
20µA/3.0mA
1.0mA/20mA
1.0mA/20mA
1.0mA/20mA
OC/20mA
1.0mA/20mA
March 3, 1989
1
853–0351 95947