
5-81
FAST AND LS TTL DATA
4-BIT BINARY FULL ADDER
WITH FAST CARRY
The SN54/74LS83A 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 LS83A operates with either
active HIGH or active LOW operands (positive or negative logic). The
SN54/74LS283 is recommended for new designs since it is identical in
function with this device and features standard corner power pins.
14
13
12
11
10
9
1
2
3
A3
4
5
6
B4
16
7
15
8
A2
Σ
4
C4
C0
GND
B1
A1
Σ
1
A4
Σ
3
Σ
2
B2
CONNECTION DIAGRAM DIP
(TOP VIEW)
B3
VCC
NOTE:
The Flatpak version has the
same pinouts (Connection
Diagram) as the Dual In-Line
Package.
PIN NAMES
LOADING
(Note a)
HIGH
LOW
A1–A4
B1–B4
C0
Σ
1–
Σ
4
C4
NOTES:
a) 1 TTL Unit Load (U.L.) = 40
μ
A 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.
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.
SN54/74LS83A
4-BIT BINARY FULL ADDER
WITH FAST CARRY
LOW POWER SCHOTTKY
J SUFFIX
CERAMIC
CASE 620-09
N SUFFIX
PLASTIC
CASE 648-08
16
1
16
1
ORDERING INFORMATION
SN54LSXXJ
SN74LSXXN
SN74LSXXD
Ceramic
Plastic
SOIC
16
1
D SUFFIX
SOIC
CASE 751B-03
LOGIC SYMBOL
10 11 8
7
3 4
1 16
9 6 2 15 14
13
14
C0
B1A2B2A3B3A4B4
C4
∑
1
∑
2
∑
3
∑
4C4
LOGIC DIAGRAM
A3
3
VCC = PIN 5
GND = PIN 12
= PIN NUMBERS
C1
C2
C3
C0 A1
13
B1
A2
B2
B3
A4
B4
C4
∑
1
∑
2
∑
3
∑
4
15
4
10
11
16
1
2
6
7
9
8
14