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

4

5

6

B4

7

16

15

8

Σ4

C4

C0

GND

B1

A1

Σ1

A4

Σ3

A3

Σ2

B2

A2

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

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.

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.

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

Ceramic

SN74LSXXN

Plastic

SN74LSXXD

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

B1 A2 B2 A3 B3 A4 B4

C4

∑1∑2 ∑3∑4 C4

LOGIC DIAGRAM

VCC = PIN 5

GND = PIN 12

= PIN NUMBERS

C1

C2

C3

C0 A1

B1

A2

B2

A3 B3

A4

B4

C4

∑1

∑2

∑3

∑4

15

3

4

10

11

16

1

2

6

7

9

13

8

14