74HC283DB datasheet(5/20 Pages) PHILIPS

5 / 20 page

9397 750 13811

Product data sheet

Rev. 03 — 11 November 2004

5 of 20

Philips Semiconductors

74HC283

4-bit binary full adder with fast carry

6.2 Pin description

Functional description

7.1 Function table

[1]

H = HIGH voltage level;

L = LOW voltage level.

[2]

Example for active HIGH: 10 + 9 (0 + 1010 + 1001) = 19 (10011).

[3]

Example for active LOW: 5 + 6 (1 + 0101 + 0110) = 12 (01100).

Table 3:

Pin description

Symbol

Description

sum output 2

B operand input 2

A operand input 2

sum output 1

A operand input 1

B operand input 1

CIN

carry input

GND

ground (0 V)

COUT

carry output

sum output 4

B operand input 4

A operand input 4

sum output 3

A operand input 3

B operand input 3

VCC

positive supply voltage

Table 4:

Function table [1]

Pins

Input

Output

CIN

COUT

Logic levels

Active HIGH [2]

0101010011

011

Active LOW [3]

1010101100

100

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