4-Bit Binary Full Adder With Fast Carry
SN54/74LS83A 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, B 1 – 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. CONNECTION DIAGRAM DIP (TOP VIEW)
B4 16 Σ4 15 C4 14 C0 13 GND 12 B1 11 A1 10 Σ1 9
NOTE: The Flatpak version has the same pinouts (Connection Diagram) as the Dual In-Line Package.
4-BIT BINARY FULL ADDER WITH FAST CARRY
LOW POWER SCHOTTKY
J SUFFIX CERAMIC CASE 620-09
16 1
1 A4
2 Σ3
3 A3
4 B3
5 VCC
6 Σ2
7 B2
8 A2 LOADING (Note a) HIGH LOW 0.5 U.L. 0.5 U.L. 0.25 U.L. 5 (2.5) U.L. 5 (2.5) U.L.
16 1
PIN NAMES
N SUFFIX PLASTIC CASE 648-08
A1 – A4 B1 – B4 C0 Σ1 – Σ4 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.
16 1
D SUFFIX SOIC CASE 751B-03
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.
ORDERING INFORMATION
SN54LSXXJ SN74LSXXN SN74LSXXD Ceramic Plastic SOIC
LOGIC DIAGRAM
C0 A1
13 10
B1
11
A2
8
B2
7
A3
3
B3
4
A4
1
B4
16
VCC = PIN 5 GND = PIN 12 = PIN NUMBERS
LOGIC SYMBOL
10 11 8 7 3 4 1 16 B1 A2 B2 A3 B3 A4 B4 C4 ∑1∑2 ∑3 ∑4 C4 9 6 2 15 14
13
C0
14
C1
C2
C3
9
6
2
15
14
∑1
∑2
∑3
∑4
C4
FAST AND LS TTL DATA 5-81
SN54/74LS83A
FUNCTIONAL DESCRIPTION The LS83A adds two 4-bit binary words (A plus B) plus the incoming carry. The binary sum appears on the sum
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, B 1 – 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. CONNECTION DIAGRAM DIP (TOP VIEW)
B4 16 Σ4 15 C4 14 C0 13 GND 12 B1 11 A1 10 Σ1 9
NOTE: The Flatpak version has the same pinouts (Connection Diagram) as the Dual In-Line Package.
4-BIT BINARY FULL ADDER WITH FAST CARRY
LOW POWER SCHOTTKY
J SUFFIX CERAMIC CASE 620-09
16 1
1 A4
2 Σ3
3 A3
4 B3
5 VCC
6 Σ2
7 B2
8 A2 LOADING (Note a) HIGH LOW 0.5 U.L. 0.5 U.L. 0.25 U.L. 5 (2.5) U.L. 5 (2.5) U.L.
16 1
PIN NAMES
N SUFFIX PLASTIC CASE 648-08
A1 – A4 B1 – B4 C0 Σ1 – Σ4 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.
16 1
D SUFFIX SOIC CASE 751B-03
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.
ORDERING INFORMATION
SN54LSXXJ SN74LSXXN SN74LSXXD Ceramic Plastic SOIC
LOGIC DIAGRAM
C0 A1
13 10
B1
11
A2
8
B2
7
A3
3
B3
4
A4
1
B4
16
VCC = PIN 5 GND = PIN 12 = PIN NUMBERS
LOGIC SYMBOL
10 11 8 7 3 4 1 16 B1 A2 B2 A3 B3 A4 B4 C4 ∑1∑2 ∑3 ∑4 C4 9 6 2 15 14
13
C0
14
C1
C2
C3
9
6
2
15
14
∑1
∑2
∑3
∑4
C4
FAST AND LS TTL DATA 5-81
SN54/74LS83A
FUNCTIONAL DESCRIPTION The LS83A adds two 4-bit binary words (A plus B) plus the incoming carry. The binary sum appears on the sum