SN74LS283DR2 [ONSEMI]
LS SERIES, 4-BIT ADDER/SUBTRACTOR, PDSO16, PLASTIC, SOIC-16;
| 型号： | SN74LS283DR2 |
| 厂家： | 
ONSEMI |
| 描述： | LS SERIES, 4-BIT ADDER/SUBTRACTOR, PDSO16, PLASTIC, SOIC-16 光电二极管 逻辑集成电路 |
| 文件： | 总8页 (文件大小：125K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
The SN74LS283 is a high-speed 4-Bit Binary Full Adder with
internal carry lookahead. It accepts two 4-bit binary words (A –A
1
4,
B –B ) and a Carry Input (C ). It generates the binary Sum outputs
1
4
0
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(∑ –∑ ) and the Carry Output (C ) from the most significant bit. The
1
4
4
LS283 operates with either active HIGH or active LOW operands
(positive or negative logic).
LOW
POWER
SCHOTTKY
GUARANTEED OPERATING RANGES
Symbol
Parameter
Supply Voltage
Min
4.75
0
Typ
5.0
25
Max
5.25
70
Unit
V
V
CC
T
A
Operating Ambient
Temperature Range
°C
I
Output Current – High
Output Current – Low
–0.4
8.0
mA
mA
OH
I
OL
16
1
PLASTIC
N SUFFIX
CASE 648
16
1
SOIC
D SUFFIX
CASE 751B
ORDERING INFORMATION
Device
Package
16 Pin DIP
16 Pin
Shipping
SN74LS283N
SN74LS283D
2000 Units/Box
2500/Tape & Reel
Semiconductor Components Industries, LLC, 1999
1
Publication Order Number:
December, 1999 – Rev. 6
SN74LS283/D
SN74LS283
CONNECTION DIAGRAM DIP (TOP VIEW)
V
CC
B
3
A
3
Σ
A
4
B
4
Σ
C
4
3
4
16
15
14
13
12
11
10
9
NOTE:
The Flatpak version has the same
pinouts (Connection Diagram) as
the Dual In-Line Package.
1
2
3
4
5
6
8
7
Σ
B
2
A
2
Σ
A
1
B
1
C
0
GND
2
1
LOADING (Note a)
HIGH
LOW
PIN NAMES
A – A
Operand A Inputs
Operand B Inputs
Carry Input
Sum Outputs
Carry Output
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 U.L.
1
4
B – B
1
4
C
0
1
–
4
C
4
5 U.L.
NOTES:
a) 1 TTL Unit Load (U.L.) = 40 A HIGH/1.6 mA LOW.
LOGIC SYMBOL
5
3 14 12 6 2 15 11
A
1
A
2
A A
B
1
B
2
B B
3 4
3
4
7
9
C
0
C
4
∑
∑ ∑ ∑
2 3
1
4
4
1 13 10
V
CC
= PIN 16
GND = PIN 8
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2
SN74LS283
LOGIC DIAGRAM
C
0
A
1
B
1
A
2
B
2
A
3
B
3
A
4
B
4
7
5
6
2
14
15
12
11
3
C
1
C
2
C
3
4
10
13
1
9
∑
∑
∑
∑
C
4
V
CC
= PIN 16
1
2
3
4
GND = PIN 8
= PIN NUMBERS
FUNCTIONAL DESCRIPTION
The LS283 adds two 4-bit binary words (A plus B) plus
the incoming carry. The binary sum appears on the sum
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.
outputs (∑ –∑ ) and outgoing carry (C4) outputs.
1
4
C0 + (A1 + B1) + 2(A2 + B2) + 4(A3 + B3) + 8(A4 + B4) = ∑1 + 2
∑2 + 4 ∑3 + 8 ∑4 + 16C4
Where: (+) = plus
Example:
C
A
A
A
A
B
B
B
B
∑
∑
∑
∑
C
4
0
1
2
3
4
1
2
3
4
1
2
3
4
logic levels
Active HIGH
Active LOW
L
L
H
L
H
1
0
H
L
L
H
H
1
0
H
1
0
L
L
H
0
1
0
1
1
0
0
1
1
0
0
1
0
1
1
0
0
1
0
1
1
0
(10+9=19)
(carry+5+6=12)
Interchanging inputs of equal weight does not affect the operation, thus C , A , B , can be arbitrarily assigned to pins 7, 5 or 3.
0
1
1
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3
SN74LS283
FUNCTIONAL TRUTH TABLE
C (n–1)
A
B
∑
C
n
n
n
n
L
L
L
L
L
H
L
H
L
H
L
L
L
L
L
H
L
H
H
H
L
H
H
L
L
H
H
H
H
L
H
L
L
H
H
H
H
L
H
H
C –C are generated internally
1
3
C
0
is an external input
C is an output generated internally
4
DC CHARACTERISTICS OVER OPERATING TEMPERATURE RANGE (unless otherwise specified)
Limits
Min
Typ
Max
Symbol
Parameter
Input HIGH Voltage
Unit
Test Conditions
Guaranteed Input HIGH Voltage for
All Inputs
V
2.0
V
IH
0.8
Guaranteed Input LOW Voltage for
All Inputs
V
V
V
Input LOW Voltage
V
V
V
IL
Input Clamp Diode Voltage
Output HIGH Voltage
–0.65
3.5
–1.5
V
V
= MIN, I = –18 mA
IN
IK
CC
= MIN, I = MAX, V = V
IH
CC
OH
IN
2.7
OH
or V per Truth Table
IL
V
V
= V MIN,
CC
0.25
0.35
0.4
0.5
V
V
I
= 4.0 mA
= 8.0 mA
CC
OL
OL
= V or V
IH
V
OL
Output LOW Voltage
IN
IL
I
per Truth Table
C
20
40
µA
µA
0
V
= MAX, V = 2.7 V
IN
CC
CC
Any A or B
I
IH
Input HIGH Current
Input LOW Current
C
0.1
mA
mA
mA
mA
mA
0
V
= MAX, V = 7.0 V
IN
Any A or B
0.2
C
–0.4
–0.8
–100
0
I
I
V
V
= MAX, V = 0.4 V
IL
CC
IN
Any A or B
Short Circuit Current (Note 1)
–20
= MAX
= MAX
OS
CC
Power Supply Current
Total, Output HIGH
34
39
I
mA
V
CC
CC
Total, Output LOW
Note 1: Not more than one output should be shorted at a time, nor for more than 1 second.
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4
SN74LS283
AC CHARACTERISTICS (T = 25°C, V = 5.0 V)
A
CC
Limits
Symbol
Parameter
Unit
Test Conditions
Min
Typ
Max
t
t
Propagation Delay, C Input
to Any Σ Output
16
15
24
24
PLH
0
ns
PHL
t
t
Propagation Delay, Any A or B Input
to Σ Outputs
15
15
24
24
PLH
PHL
ns
ns
ns
C = 15 pF
Figures 1 & 2
L
t
t
Propagation Delay, C Input
11
11
17
22
PLH
PHL
0
to C Output
4
t
t
Propagation Delay, Any A or B Input
11
12
17
17
PLH
PHL
to C Output
4
AC WAVEFORMS
1.3 V
1.3 V
V
IN
V
IN
t
t
t
t
PHL
PHL
PLH
PLH
V
OUT
1.3 V
1.3 V
V
OUT
Figure 1.
Figure 2.
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5
SN74LS283
PACKAGE DIMENSIONS
N SUFFIX
PLASTIC PACKAGE
CASE 648–08
ISSUE R
NOTES:
–A–
1. DIMENSIONING AND TOLERANCING PER ANSI
Y14.5M, 1982.
2. CONTROLLING DIMENSION: INCH.
3. DIMENSION L TO CENTER OF LEADS WHEN
FORMED PARALLEL.
4. DIMENSION B DOES NOT INCLUDE MOLD FLASH.
5. ROUNDED CORNERS OPTIONAL.
16
1
9
8
B
S
INCHES
DIM MIN MAX
0.740 0.770 18.80 19.55
MILLIMETERS
MIN MAX
F
A
B
C
D
F
C
L
0.250 0.270
0.145 0.175
0.015 0.021
6.35
3.69
0.39
1.02
6.85
4.44
0.53
1.77
0.040
0.70
SEATING
–T–
G
H
J
K
L
M
S
0.100 BSC
0.050 BSC
0.008 0.015
2.54 BSC
1.27 BSC
PLANE
K
M
0.21
0.38
3.30
7.74
10
H
J
0.110
0.295 0.305
10
0.020 0.040
0.130
2.80
7.50
0
G
D 16 PL
0
0.51
1.01
M
M
0.25 (0.010)
T A
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6
SN74LS283
PACKAGE DIMENSIONS
D SUFFIX
PLASTIC SOIC PACKAGE
CASE 751B–05
ISSUE J
–A–
NOTES:
1. DIMENSIONING AND TOLERANCING PER ANSI
Y14.5M, 1982.
2. CONTROLLING DIMENSION: MILLIMETER.
3. DIMENSIONS A AND B DO NOT INCLUDE
MOLD PROTRUSION.
16
1
9
8
–B–
P 8 PL
4. MAXIMUM MOLD PROTRUSION 0.15 (0.006)
PER SIDE.
M
S
0.25 (0.010)
B
5. DIMENSION D DOES NOT INCLUDE DAMBAR
PROTRUSION. ALLOWABLE DAMBAR
PROTRUSION SHALL BE 0.127 (0.005) TOTAL
IN EXCESS OF THE D DIMENSION AT
MAXIMUM MATERIAL CONDITION.
G
MILLIMETERS
DIM MIN MAX
INCHES
MIN
MAX
0.393
0.157
0.068
0.019
0.049
F
A
B
C
D
F
9.80
3.80
1.35
0.35
0.40
10.00 0.386
4.00 0.150
1.75 0.054
0.49 0.014
1.25 0.016
R X 45
K
C
G
J
K
M
P
1.27 BSC
0.050 BSC
–T–
SEATING
PLANE
0.19
0.10
0
0.25 0.008
0.25 0.004
0.009
0.009
7
J
M
D
16 PL
7
0
5.80
0.25
6.20 0.229
0.50 0.010
0.244
0.019
M
S
S
0.25 (0.010)
T B
A
R
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7
SN74LS283
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