Semiconductor Components Industries, LLC, 2001
June, 2001 – Rev. 7 1Publication Order Number:
SN74LS283/D
SN74LS283
4-Bit Binary Full Adder
with Fast Carry
The SN74LS283 is a high-speed 4-Bit Binary Full Adder with
internal carry lookahead. It accepts two 4-bit binary words (A1–A4,
B1–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).
GUARANTEED OPERATING RANGES
Symbol Parameter Min Typ Max Unit
VCC Supply Voltage 4.75 5.0 5.25 V
TAOperating Ambient
Temperature Range 0 25 70 °C
IOH Output Current – High –0.4 mA
IOL Output Current – Low 8.0 mA
LOW
POWER
SCHOTTKY
Device Package Shipping
ORDERING INFORMATION
SN74LS283N 16 Pin DIP 2000 Units/Box
SN74LS283D SOIC–16
SOIC
D SUFFIX
CASE 751B
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38 Units/Rail
PLASTIC
N SUFFIX
CASE 648
16
1
16
1
SN74LS283DR2 SOIC–16 2500/Tape & Reel
SN74LS283M SOEIAJ–16 See Note 1
SN74LS283MEL SOEIAJ–16
1. For ordering information on the EIAJ version of
the SOIC package, please contact your local
ON Semiconductor representative.
See Note 1
SOEIAJ
M SUFFIX
CASE 966
16
1
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SN74LS283
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2
CONNECTION DIAGRAM DIP (TOP VIEW)
Operand A Inputs
Operand B Inputs
Carry Input
Sum Outputs
Carry Output
A1 - A4
B1 - B4
C0
1 - 4
C4
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.
5 U.L.
NOTES:
a) 1 TTL Unit Load (U.L.) = 40 A HIGH/1.6 mA LOW.
HIGH LOW
(Note a)LOADING
PIN NAMES
LOGIC SYMBOL
NOTE:
The Flatpak version has the same
pinouts (Connection Diagram) as
the Dual InLine Package.
5 3 14 12 6 2 15 11
97
4 1 13 10
A1A2A3A4B1B2B3B4
∑1∑2∑3∑4
VCC = PIN 16
GND = PIN 8
C0C4
14 13 12 11 10 9
123456 7
16 15
8
VCC
Σ2
B3A3Σ3A4Σ4
B4C4
B2A2Σ1A1B1C0GND
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LOGIC DIAGRAM
C0A1B1A2B2A3B3A4B4
∑1∑2∑3∑4C4
VCC = PIN 16
GND = PIN 8
= PIN NUMBERS
C1C2C3
14
1
267 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.
C0 + (A1 + B1) + 2(A2 + B2) + 4(A3 + B 3) + 8(A4 + B4) = ∑1 + 2
∑2 + 4 ∑3 + 8 ∑4 + 16C4
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:
C0A1A2A3A4B1B2B3B4∑1∑2∑3∑4C4
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.
SN74LS283
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4
FUNCTIONAL TRUTH TABLE
C (n–1) AnBn∑nCn
L L L L L
L L H H L
L H L H L
L H H L H
H L L H L
H L H L H
H H L L H
H H H H H
C1–C3 are generated internally
C0 is an external input
C4 is an output generated internally
DC CHARACTERISTICS OVER OPERATING TEMPERATURE RANGE (unless otherwise specified)
Limits
Symbol Parameter Min Typ Max Unit Test Conditions
VIH Input HIGH Voltage 2.0 V Guaranteed Input HIGH Voltage for
All Inputs
VIL Input LOW Voltage 0.8 VGuaranteed Input LOW Voltage for
All Inputs
VIK Input Clamp Diode Voltage –0.65 –1.5 V VCC = MIN, IIN = –18 mA
VOH Output HIGH Voltage 2.7 3.5 V VCC = MIN, IOH = MAX, VIN = VIH
or VIL per Truth Table
V
Out
p
ut LOW Voltage
0.25 0.4 V IOL = 4.0 mA VCC = VCC MIN,
V V or V
VOL Output LOW Voltage 0.35 0.5 V IOL = 8.0 mA VIN = VIL or VIH
per Truth Table
C020 µA
V= MAX V =27V
I
In
p
ut HIGH Current
Any A or B 40 µAVCC = MAX, VIN = 2.7 V
IIH Input HIGH Current C00.1 mA
V= MAX V =70V
Any A or B 0.2 mA VCC = MAX, VIN = 7.0 V
I
In
p
ut LOW Current
C0–0.4 mA
VMAX V 04V
IIL Input LOW Current Any A or B –0.8 mA VCC = MAX, VIN = 0.4 V
IOS Short Circuit Current (Note 1) –20 –100 mA VCC = MAX
I
CC
Power Supply Current
Total, Output HIGH 34 mA V
CC
= MAX
ICC
Total, Output LOW 39
mA
VCC
=
MAX
Note 1: Not more than one output should be shorted at a time, nor for more than 1 second.
SN74LS283
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5
AC CHARACTERISTICS (TA = 25°C, VCC = 5.0 V)
Limits
Symbol Parameter Min Typ Max Unit Test Conditions
tPLH
tPHL Propagation Delay, C0 Input
to Any Σ Output 16
15 24
24 ns
tPLH
tPHL Propagation Delay, Any A or B Input
to Σ Outputs 15
15 24
24 ns CL = 15 pF
tPLH
tPHL Propagation Delay, C0 Input
to C4 Output 11
11 17
22 ns
CL
=
15
F
Figures 1 & 2
tPLH
tPHL Propagation Delay, Any A or B Input
to C4 Output 11
12 17
17 ns
Figure 1. Figure 2.
VIN
VOUT
1.3 V
1.3 V
1.3 V
1.3 V
VIN
VOUT
tPHL tPLH tPLH tPHL
AC WAVEFORMS
SN74LS283
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PACKAGE DIMENSIONS
N SUFFIX
PLASTIC PACKAGE
CASE 648–08
ISSUE R
NOTES:
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.
–A–
B
FC
S
HGD
J
L
M
16 PL
SEATING
18
916
K
PLANE
–T–
M
A
M
0.25 (0.010) T
DIM MIN MAX MIN MAX
MILLIMETERSINCHES
A0.740 0.770 18.80 19.55
B0.250 0.270 6.35 6.85
C0.145 0.175 3.69 4.44
D0.015 0.021 0.39 0.53
F0.040 0.70 1.02 1.77
G0.100 BSC 2.54 BSC
H0.050 BSC 1.27 BSC
J0.008 0.015 0.21 0.38
K0.110 0.130 2.80 3.30
L0.295 0.305 7.50 7.74
M0 10 0 10
S0.020 0.040 0.51 1.01
D SUFFIX
PLASTIC SOIC PACKAGE
CASE 751B–05
ISSUE J
NOTES:
1. DIMENSIONING AND TOLERANCING PER ANSI
Y14.5M, 1982.
2. CONTROLLING DIMENSION: MILLIMETER.
3. DIMENSIONS A AND B DO NOT INCLUDE
MOLD PROTRUSION.
4. MAXIMUM MOLD PROTRUSION 0.15 (0.006)
PER SIDE.
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.
18
16 9
SEATING
PLANE
F
J
M
RX 45
G
8 PLP
–B–
–A–
M
0.25 (0.010) B S
–T–
D
K
C
16 PL
S
B
M
0.25 (0.010) A S
T
DIM MIN MAX MIN MAX
INCHESMILLIMETERS
A9.80 10.00 0.386 0.393
B3.80 4.00 0.150 0.157
C1.35 1.75 0.054 0.068
D0.35 0.49 0.014 0.019
F0.40 1.25 0.016 0.049
G1.27 BSC 0.050 BSC
J0.19 0.25 0.008 0.009
K0.10 0.25 0.004 0.009
M0 7 0 7
P5.80 6.20 0.229 0.244
R0.25 0.50 0.010 0.019

SN74LS283
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PACKAGE DIMENSIONS
HE
A1
DIM MIN MAX MIN MAX
INCHES
--- 2.05 --- 0.081
MILLIMETERS
0.05 0.20 0.002 0.008
0.35 0.50 0.014 0.020
0.18 0.27 0.007 0.011
9.90 10.50 0.390 0.413
5.10 5.45 0.201 0.215
1.27 BSC 0.050 BSC
7.40 8.20 0.291 0.323
0.50 0.85 0.020 0.033
1.10 1.50 0.043 0.059
0
0.70 0.90 0.028 0.035
--- 0.78 --- 0.031
A1
HE
Q1
LE
10 0
10
LEQ1
NOTES:
1. DIMENSIONING AND TOLERANCING PER ANSI
Y14.5M, 1982.
2. CONTROLLING DIMENSION: MILLIMETER.
3. DIMENSIONS D AND E DO NOT INCLUDE MOLD
FLASH OR PROTRUSIONS AND ARE MEASURED
AT THE PARTING LINE. MOLD FLASH OR
PROTRUSIONS SHALL NOT EXCEED 0.15 (0.006)
PER SIDE.
4. TERMINAL NUMBERS ARE SHOWN FOR
REFERENCE ONLY.
5. THE LEAD WIDTH DIMENSION (b) DOES NOT
INCLUDE DAMBAR PROTRUSION. ALLOWABLE
DAMBAR PROTRUSION SHALL BE 0.08 (0.003)
TOTAL IN EXCESS OF THE LEAD WIDTH
DIMENSION AT MAXIMUM MATERIAL CONDITION.
DAMBAR CANNOT BE LOCATED ON THE LOWER
RADIUS OR THE FOOT. MINIMUM SPACE
BETWEEN PROTRUSIONS AND ADJACENT LEAD
TO BE 0.46 ( 0.018).
M
L
DETAIL P
VIEW P
c
A
b
e
M
0.13 (0.005) 0.10 (0.004)
1
16 9
8
D
Z
E
A
b
c
D
E
e
L
M
Z
M SUFFIX
SOEIAJ PACKAGE
CASE 966–01
ISSUE O
SN74LS283
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8
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Phone: 81–3–5740–2700
Email: r14525@onsemi.com
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For additional information, please contact your local
Sales Representative.
SN74LS283/D
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