MOTOROLA SN74LS283D

SN54/74LS283
4-BIT BINARY FULL ADDER
WITH FAST CARRY
The SN54 / 74LS283 is a high-speed 4-Bit Binary Full Adder with internal
carry lookahead. It accepts two 4-bit binary words (A1 – A4, B 1 – 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 LS283 operates with either active HIGH or active LOW operands (positive or negative logic).
4-BIT BINARY FULL ADDER
WITH FAST CARRY
LOW POWER SCHOTTKY
CONNECTION DIAGRAM DIP (TOP VIEW)
VCC
16
B3
15
A3
14
Σ3
13
A4
12
B4
11
Σ4
10
C4
9
J SUFFIX
CERAMIC
CASE 620-09
16
NOTE:
The Flatpak version
has the same pinouts
(Connection Diagram) as
the Dual In-Line Package.
1
Σ2
2
B2
3
A2
4
Σ1
5
A1
PIN NAMES
A1 – A4
B1–B4
C0
∑1 – ∑4
C4
Operand A Inputs
Operand B Inputs
Carry Input
Sum Outputs (Note b)
Carry Output (Note b)
6
B1
7
C0
1
N SUFFIX
PLASTIC
CASE 648-08
16
8
GND
1
16
LOADING (Note a)
HIGH
LOW
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.
D SUFFIX
SOIC
CASE 751B-03
1
ORDERING INFORMATION
SN54LSXXXJ
SN74LSXXXN
SN74LSXXXD
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.
Ceramic
Plastic
SOIC
LOGIC SYMBOL
5
3 14 12 6 2 15 11
A1 A2 A3 A4 B1 B2 B3 B4
7
C0
C4
∑1 ∑2 ∑3 ∑4
4
1 13 10
VCC = PIN 16
GND = PIN 8
FAST AND LS TTL DATA
5-1
9
SN54/74LS283
LOGIC DIAGRAM
C0
A1
7
B1
5
A2
6
B2
A3
C1
4
∑1
VCC = PIN 16
GND = PIN 8
= PIN NUMBERS
B3
A4
15
14
2
3
C2
∑2
11
C3
10
13
1
B4
12
∑3
9
∑4
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.
C4
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.
C0 + (A1 + B1) + 2(A2 + B2) + 4(A3 + B3) + 8(A4 + B4) = ∑1 + 2 ∑2
+ 4 ∑3 + 8 ∑4 + 16C4
Where: (+) = plus
Example:
C0
A1
A2
A3
A4
B1
B2
B3
B4
∑1
∑2
∑3
∑4
C4
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 C0, A1, B1, can be arbitrarily assigned to pins 7, 5 or 3.
FAST AND LS TTL DATA
5-2
SN54/74LS283
FUNCTIONAL TRUTH TABLE
C (n – 1)
An
Bn
∑n
Cn
L
L
L
L
H
H
H
H
L
L
H
H
L
L
H
H
L
H
L
H
L
H
L
H
L
H
H
L
H
L
L
H
L
L
L
H
L
H
H
H
C1 – C3 are generated internally
C0 is an external input
C4 is an output generated internally
GUARANTEED OPERATING RANGES
Symbol
Parameter
Min
Typ
Max
Unit
VCC
Supply Voltage
54
74
4.5
4.75
5.0
5.0
5.5
5.25
V
TA
Operating Ambient Temperature Range
54
74
– 55
0
25
25
125
70
°C
IOH
Output Current — High
54, 74
– 0.4
mA
IOL
Output Current — Low
54
74
4.0
8.0
mA
DC CHARACTERISTICS OVER OPERATING TEMPERATURE RANGE (unless otherwise specified)
Limits
Symbol
Min
Parameter
VIH
Input HIGH Voltage
VIL
Input LOW Voltage
VIK
Input Clamp Diode Voltage
VOH
Output HIGH Voltage
VOL
Output LOW Voltage
IIH
Max
Unit
2.0
54
0.7
74
0.8
– 0.65
– 1.5
Test Conditions
V
Guaranteed Input HIGH Voltage for
All Inputs
V
Guaranteed Input LOW Voltage for
All Inputs
V
VCC = MIN, IIN = – 18 mA
54
2.5
3.5
V
74
2.7
3.5
V
VCC = MIN, IOH = MAX, VIN = VIH
or VIL per Truth Table
54, 74
0.25
0.4
V
IOL = 4.0 mA
74
0.35
0.5
V
IOL = 8.0 mA
C0
20
µA
Any A or B
40
µA
C0
0.1
mA
Any A or B
0.2
mA
C0
– 0.4
mA
Any A or B
– 0.8
mA
– 100
mA
VCC = MAX
Power Supply Current
Total, Output HIGH
34
mA
VCC = MAX
Total, Output LOW
39
Input HIGH Current
IIL
Input LOW Current
IOS
Short Circuit Current (Note 1)
ICC
Typ
– 20
Note 1: Not more than one output should be shorted at a time, nor for more than 1 second.
FAST AND LS TTL DATA
5-3
VCC = VCC MIN,
VIN = VIL or VIH
per Truth Table
VCC = MAX, VIN = 2.7 V
VCC = MAX, VIN = 7.0 V
VCC = MAX, VIN = 0.4 V
SN54/74LS283
AC CHARACTERISTICS (TA = 25°C, VCC = 5.0 V)
Limits
Typ
Max
Unit
tPLH
tPHL
Symbol
Propagation Delay, C0 Input
to Any Σ Output
Parameter
16
15
24
24
ns
tPLH
tPHL
Propagation Delay, Any A or B Input
to Σ Outputs
15
15
24
24
ns
tPLH
tPHL
Propagation Delay, C0 Input
to C4 Output
11
11
17
22
ns
tPLH
tPHL
Propagation Delay, Any A or B Input
to C4 Output
11
12
17
17
ns
Min
Test Conditions
CL = 15 pF
Figures 1 & 2
AC WAVEFORMS
VIN
1.3 V
VIN
tPHL
VOUT
tPLH
1.3 V
tPLH
1.3 V
1.3 V
VOUT
Figure 1
Figure 2
FAST AND LS TTL DATA
5-4
tPHL