SN54LS283 Datasheet, PDF (1/4 Pages) Motorola, Inc – 4-BIT BINARY FULL ADDER WITH FAST CARRY

4-BIT BINARY FULL ADDER
WITH FAST CARRY
The SN54 / 74LS283 is a high-speed 4-Bit Binary Full Adder with internal
carry lookahead. It accepts two 4-bit binary words (A1 – A4, B1 – B4) and a
Carry Input (C0). It generates the binary Sum outputs (∑₁ – ∑₄₎ and the Carry
Output (C4) from the most significant bit. The LS283 operates with either ac-
tive HIGH or active LOW operands (positive or negative logic).
SN54/74LS283
4-BIT BINARY FULL ADDER
WITH FAST CARRY
LOW POWER SCHOTTKY
VCC B3
16 15
CONNECTION DIAGRAM DIP (TOP VIEW)
A3 Σ₃ A4 B4 Σ₄ C4
14 13 12 11 10 9
NOTE:
The Flatpak version
has the same pinouts
(Connection Diagram) as
the Dual In-Line Package.
1 2 3 4 56 78
Σ₂ B2 A2 Σ₁ A1 B1 C0 GND
PIN NAMES
LOADING (Note a)
HIGH
LOW
A1 – A4
B1–B4
C0
∑₁ – ∑₄
C4
Operand A Inputs
Operand B Inputs
Carry Input
Sum Outputs (Note b)
Carry Output (Note b)
1.0 U.L.
1.0 U.L.
0.5 U.L.
10 U.L.
10 U.L.
0.5 U.L.
0.5 U.L.
0.25 U.L.
5 (2.5) U.L.
5 (2.5) U.L.
NOTES:
a) 1 TTL Unit Load (U.L.) = 40 µA HIGH/1.6 mA LOW.
b) The Output LOW drive factor is 2.5 U.L. for Military (54) and 5 U.L. for Commercial
(74) Temperature Ranges.
16
1
16
1
16
1
J SUFFIX
CERAMIC
CASE 620-09
N SUFFIX
PLASTIC
CASE 648-08
D SUFFIX
SOIC
CASE 751B-03
ORDERING INFORMATION
SN54LSXXXJ
SN74LSXXXN
SN74LSXXXD
Ceramic
Plastic
SOIC
LOGIC SYMBOL
5 3 14 12 6 2 15 11
A1 A2 A3 A4 B1 B2 B3 B4
7 C0
C4 9
∑₁ ∑₂ ∑₃ ∑₄
4 1 13 10
VCC = PIN 16
GND = PIN 8
FAST AND LS TTL DATA
5-1