SN54F283, SN74F283
4-BIT BINARY FULL ADDERS
WITH FAST CARRY
SDFS069A D2932, MARCH 1987 REVISED OCTOBER 1993
Copyright
1993, Texas Instruments Incorporated
21
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
Full-Carry Look-Ahead Across the
Four Bits
Systems Achieve Partial Look-Ahead
Performance With the Economy of Ripple
Carry
Package Options Include Plastic
Small-Outline Packages, Ceramic Chip
Carriers, and Standard Plastic and Ceramic
300-mil DIPs
description
The
F283 is a full adder that performs the addition
of two 4-bit binary words. The sum (
) outputs are
provided for each bit and the resultant carry (C4)
output is obtained from the fourth bit.
The device features full internal look-ahead
across all four bits generating the carry term C4 in
typically 5.7 ns. This capability provides the
system designer with partial look-ahead
performance at the economy and reduced
package count of a ripple-carry implementation.
The adder logic, including the carry, is
implemented in its true form. End-around carry
can be accomplished without the need for logic or
level inversion.
The
F283 can be used with either all-active-high
(positive logic) or all-active-low (negative logic)
operands.
The SN54F283 is characterized for operation over
the full military temperature range of 55
C to
125
C. The SN74F283 is characterized for
operation from 0
C to 70
C.
logic symbol
0
6
B1
0
5
A1
3
A2
14
A3
3
12
A4
2
B2
15
B3
3
11
B4
CI
7
C0
C4
9
CO
1
4
0
1
13
10
3
2
3
4
P
Q
This symbol is in accordance with ANSI/IEEE Std 91-1984 and IEC Publication 617-12.
Pin numbers shown are for the D, J, and N packages.
SN54F283 . . . J PACKAGE
SN74F283 . . . D OR N PACKAGE
(TOP VIEW)
3
2
1 20 19
9 10 11 12 13
4
5
6
7
8
18
17
16
15
14
A3
3
NC
A4
B4
A2
1
NC
A1
B1
SN54F283 . . . FK PACKAGE
(TOP VIEW)
B2
NC
C4
4
B3
C0
GND
NC
NC No internal connection
V
CC
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
2
B2
A2
1
A1
B1
C0
GND
V
CC
B3
A3
3
A4
B4
4
C4
2
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of Texas Instruments
standard warranty. Production processing does not necessarily include
testing of all parameters.
SN54F283, SN74F283
4-BIT BINARY FULL ADDERS
WITH FAST CARRY
SDFS069A D2932, MARCH 1987 REVISED OCTOBER 1993
22
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
logic diagram (positive logic)
11
12
B4
A4
15
14
B3
A3
2
3
B2
A2
6
5
B1
A1
C0
7
1
2
3
4
C4
9
10
13
1
4
Pin numbers shown are for the D, J, and N packages.
SN54F283, SN74F283
4-BIT BINARY FULL ADDERS
WITH FAST CARRY
SDFS069A D2932, MARCH 1987 REVISED OCTOBER 1993
23
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
FUNCTION TABLE
OUTPUTS
INPUTS
WHEN C0 = L
WHEN C0 = H
WHEN C2 = L
WHEN C2 = H
A1
B1
A2
B2
1
2
C2
1
2
C2
A3
B3
A4
B4
3
4
C4
3
4
C4
L
L
L
L
L
L
L
H
L
L
H
L
L
L
H
L
L
L
H
L
L
H
L
L
H
L
L
L
H
L
H
H
L
L
L
H
L
H
H
L
L
L
H
L
L
H
L
H
H
L
H
L
H
L
H
H
L
L
L
H
L
H
H
L
H
H
L
L
L
H
H
H
H
L
L
L
H
H
L
H
L
L
L
H
L
H
L
H
H
L
H
L
L
H
H
H
L
L
L
H
L
H
L
H
H
H
L
L
L
H
H
H
L
H
L
L
H
H
L
H
L
L
H
H
L
L
H
H
L
H
H
L
H
H
H
L
H
L
H
H
L
H
H
H
H
L
H
L
H
H
H
H
H
H
L
H
H
H
H
H
NOTE: Input conditions at A1, B1, A2, B2, and C0 are used to determine outputs
1
and
2 and the value of the internal carry C2. The values at C2, A3, B3, A4,
and B4 are then used to determine outputs
3,
4, and C4.
absolute maximum ratings over operating free-air temperature range (unless otherwise noted)
Supply voltage range, V
CC
0.5 V to 7 V
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Input voltage range (see Note 1)
1.2 V to 7 V
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Input current range
30 mA to 5 mA
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Voltage range applied to any output in the high state
0.5 V to V
CC
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Current into any output in the low state
40 mA
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Operating free-air temperature range: SN54F283
55
C to 125
C
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
SN74F283
0
C to 70
C
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Storage temperature range
65
C to 150
C
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Stresses beyond those listed under "absolute maximum ratings" may cause permanent damage to the device. These are stress ratings only and
functional operation of the device at these or any other conditions beyond those indicated under "recommended operating conditions" is not
implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.
NOTE 1: The input voltage ratings may be exceeded provided the input current ratings are observed.
SN54F283, SN74F283
4-BIT BINARY FULL ADDERS
WITH FAST CARRY
SDFS069A D2932, MARCH 1987 REVISED OCTOBER 1993
24
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
recommended operating conditions
SN54F283
SN74F283
UNIT
MIN
NOM
MAX
MIN
NOM
MAX
UNIT
VCC
Supply voltage
4.5
5
5.5
4.5
5
5.5
V
VIH
High-level input voltage
2
2
V
VIL
Low-level input voltage
0.8
0.8
V
IIK
Input clamp current
18
18
mA
IOH
High-level output current
1
1
mA
IOL
Low-level output current
20
20
mA
TA
Operating free-air temperature
55
125
0
70
C
electrical characteristics over recommended operating free-air temperature range (unless
otherwise noted)
PARAMETER
TEST CONDITIONS
SN54F283
SN74F283
UNIT
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
MIN
TYP
MAX
UNIT
VIK
VCC = 4.5 V,
II = 18 mA
1.2
1.2
V
VOH
VCC = 4.5 V
IOH = 1 mA
2.5
3.4
2.5
3.4
V
VOH
VCC = 4.75 V,
IOH = 1 mA
2.7
V
VOL
VCC = 4.5 V
IOL = 20 mA
0.3
0.5
0.3
0.5
V
II
VCC = 5.5 V,
VI = 7 V
0.1
0.1
mA
IIH
VCC = 5.5 V,
VI = 2.7 V
20
20
A
IIL
Any A or B
VCC = 5 5 V
VI = 0 5 V
1.2
1.2
mA
IIL
C0
VCC = 5.5 V,
VI = 0.5 V
0.6
0.6
mA
IOS
VCC = 5.5 V,
VO = 0
60
150
60
150
mA
ICC
VCC = 5.5 V,
VI = 4.5 V
36
55
36
55
mA
All typical values are at VCC = 5 V, TA = 25
C.
Not more than one output should be shorted at a time, and the duration of the short circuit should not exceed one second.
switching characteristics (see Note 2)
PARAMETER
FROM
(INPUT)
TO
(OUTPUT)
VCC = 5 V,
CL = 50 pF,
RL = 500
,
TA = 25
C
VCC = 4.5 V to 5.5 V,
CL = 50 pF,
RL = 500
,
TA = MIN to MAX
UNIT
(INPUT)
(OUTPUT)
F283
SN54F283
SN74F283
MIN
TYP
MAX
MIN
MAX
MIN
MAX
tPLH
C0
2.7
6.6
9.5
2.7
14
2.7
10.5
ns
tPHL
C0
3.2
6.6
9.5
3.2
14
3.2
10.5
ns
tPLH
A or B
3.2
6.6
9.5
3.2
14
3.2
10.5
ns
tPHL
A or B
2.7
6.6
9.5
2.7
14
2.7
10.5
ns
tPLH
C0
C4
2.7
5.3
7.5
2.7
10.5
2.7
8.5
ns
tPHL
C0
C4
2.2
5
7
2.2
10
2.2
8
ns
tPLH
A or B
C4
2.7
5.3
7.5
2.7
10.5
2.7
8.5
ns
tPHL
A or B
C4
2.2
4.9
7
2.2
10
2.2
8
ns
For conditions shown as MIN or MAX, use the appropriate value specified under recommended operating conditions.
NOTE 2: Load circuits and waveforms are shown in Section 1.
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accordance with TI's standard warranty. Testing and other quality control techniques are utilized to the extent
TI deems necessary to support this warranty. Specific testing of all parameters of each device is not necessarily
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Copyright
1998, Texas Instruments Incorporated
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