參數(shù)資料
型號(hào): SN74LS283DRE4
廠商: Texas Instruments, Inc.
英文描述: 4 BIT BINARY FULL ADDERS WITH FAST CARRY
中文描述: 4位二進(jìn)制全加器與快速進(jìn)
文件頁數(shù): 3/8頁
文件大?。?/td> 126K
代理商: SN74LS283DRE4
SN74LS283
http://onsemi.com
3
LOGIC DIAGRAM
C
0
A
1
B
1
A
2
B
2
A
3
B
3
A
4
B
4
1
2
3
4
C
4
V
CC
= PIN 16
GND = PIN 8
= PIN NUMBERS
C
1
C
2
C
3
14
1
2
6
7
3
4
5
9
11
12
10
13
15
FUNCTIONAL DESCRIPTION
The LS283 adds two 4-bit binary words (A plus B) plus
the incoming carry. The binary sum appears on the sum
outputs (
1
4
) and outgoing carry (C4) outputs.
C
0
+ (A
1
+ B
1
) + 2(A
2
+ B
2
) + 4(A
3
+ B
3
) + 8(A
4
+ B
4
) =
1
+ 2
2
+ 4
3
+ 8
4
+ 16C
4
Where: (+) = plus
Due to the symmetry of the binary add function the LS283
can be used with either all inputs and outputs active HIGH
(positive logic) or with all inputs and outputs active LOW
(negative logic). Note that with active HIGH inputs, Carry
Input can not be left open, but must be held LOW when no
carry in is intended.
Example:
C
0
A
1
A
2
A
3
A
4
B
1
B
2
B
3
B
4
1
2
3
4
C
4
logic levels
L
L
H
L
H
H
L
L
H
H
H
L
L
H
Active HIGH
0
0
1
0
1
1
0
0
1
1
1
0
0
1
(10+9=19)
Active LOW
1
1
0
1
0
0
1
1
0
0
0
1
1
0
(carry+5+6=12)
Interchanging inputs of equal weight does not affect the operation, thus C
0
, A
1
, B
1
, can be arbitrarily assigned to pins 7, 5 or 3.
相關(guān)PDF資料
PDF描述
SN74LS283D LOW POWER SCHOTTKY
SN74LS283N LOW POWER SCHOTTKY
SN74LS290D DECADE COUNTER; 4-BIT BINARY COUNTER
SN54LS290J Octal D-Type Flip-Flop with 3-State Outputs; Package: TSSOP 20 LEAD; No of Pins: 20; Container: Tape and Reel; Qty per Container: 2500
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