Page 20 - EE2449_TTL_Datasheet

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 (A 1 –A 4 , B 1 –B 4 ) and a
Carry Input (C 0 ). It generates the binary Sum outputs ∑ 1 –∑ 4 ) and the Carry 4-BIT BINARY FULL ADDER
Output (C 4 ) from the most significant bit. The LS83A operates with either WITH FAST CARRY
active HIGH or active LOW operands (positive or negative logic). The
SN54/74LS283 is recommended for new designs since it is identical in LOW POWER SCHOTTKY
function with this device and features standard corner power pins.

CONNECTION DIAGRAM DIP (TOP VIEW)
B 4 S 4 C 4 C 0 GND B 1 A 1 S 1
16 15 14 13 12 11 10 9 J SUFFIX
CERAMIC
CASE 620-09
NOTE:
16
The Flatpak version has the 1
same pinouts (Connection
Diagram) as the Dual In-Line
Package.
1 2 3 4 5 6 7 8 N SUFFIX
A 4 S 3 A 3 B 3 V CC S 2 B 2 A 2 PLASTIC
CASE 648-08
PIN NAMES LOADING (Note a) 16
1
HIGH LOW
A 1 –A 4 Operand A Inputs 1.0 U.L. 0.5 U.L.
B 1 –B 4 Operand B Inputs 1.0 U.L. 0.5 U.L.
C 0 Carry Input 0.5 U.L. 0.25 U.L. D SUFFIX
S 1 –S 4 Sum Outputs (Note b) 10 U.L. 5 (2.5) U.L. 16 SOIC
C 4 Carry Output (Note b) 10 U.L. 5 (2.5) U.L. 1 CASE 751B-03
NOTES:
a) 1 TTL Unit Load (U.L.) = 40 mA 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) ORDERING INFORMATION
Temperature Ranges.
SN54LSXXJ Ceramic
SN74LSXXN Plastic
LOGIC DIAGRAM SN74LSXXD SOIC
C 0 A 1 B 1 A 2 B 2 A 3 B 3 A 4 B 4 V CC = PIN 5
13 10 11 8 7 3 4 1 16 GND = PIN 12
= PIN NUMBERS
LOGIC SYMBOL

10 11 8 7 3 4 1 16

B 1 A 2 B 2 A 3 B 3 A 4 B 4
13 C 0 C 4 14
∑ 1 ∑ 2 ∑ 3 ∑ 4 C 4

96 2 15 14

C 1 C 2 C 3

9 6 2 15 14
∑ 1 ∑ 2 ∑ 3 ∑ 4 C 4

FAST AND LS TTL DATA
5-80
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