SN74F283N [TI]
4-BIT BINARY FULL ADDERS WITH FAST CARRY; 4位二进制全加器与快速进位
| 型号： | SN74F283N |
| 厂家： | 
TEXAS INSTRUMENTS |
| 描述： | 4-BIT BINARY FULL ADDERS WITH FAST CARRY |
| 文件： | 总5页 (文件大小：83K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
SN54F283, SN74F283
4-BIT BINARY FULL ADDERS
WITH FAST CARRY
SDFS069A – D2932, MARCH 1987 – REVISED OCTOBER 1993
SN54F283 . . . J PACKAGE
SN74F283 . . . D OR N PACKAGE
(TOP VIEW)
• Full-Carry Look-Ahead Across the
Four Bits
• Systems Achieve Partial Look-Ahead
Performance With the Economy of Ripple
Carry
V
Σ2
B2
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
CC
B3
A3
Σ3
A4
B4
Σ4
C4
• Package Options Include Plastic
Small-Outline Packages, Ceramic Chip
Carriers, and Standard Plastic and Ceramic
300-mil DIPs
A2
Σ1
A1
B1
C0
GND
description
The ′F283 is a full adder that performs the addition
of two 4-bit binary words. The sum (Σ) outputs are
provided for each bit and the resultant carry (C4)
output is obtained from the fourth bit.
SN54F283 . . . FK PACKAGE
(TOP VIEW)
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.
3
2
1
20 19
18
A3
Σ3
NC
A4
B4
A2
Σ1
4
5
6
7
8
17
16
15
14
NC
A1
B1
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.
9 10 11 12 13
NC – No internal connection
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
Σ
5
A1
A2
A3
A4
B1
B2
B3
B4
C0
0
4
Σ1
1
Σ2
13
Σ3
10
Σ4
3
0
14
12
6
P
Σ
3
0
3
2
Q
15
11
7
9
CO
C4
3
CI
†
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.
Copyright 1993, Texas Instruments Incorporated
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.
2–1
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
SN54F283, SN74F283
4-BIT BINARY FULL ADDERS
WITH FAST CARRY
SDFS069A – D2932, MARCH 1987 – REVISED OCTOBER 1993
logic diagram (positive logic)
9
C4
11
B4
12
A4
10
Σ4
15
B3
13
14
Σ3
A3
2
B2
1
Σ2
3
A2
6
B1
4
Σ1
5
A1
7
C0
Pin numbers shown are for the D, J, and N packages.
2–2
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
SN54F283, SN74F283
4-BIT BINARY FULL ADDERS
WITH FAST CARRY
SDFS069A – D2932, MARCH 1987 – REVISED OCTOBER 1993
FUNCTION TABLE
OUTPUTS
INPUTS
WHEN C0 = L
WHEN C2 = L
WHEN C0 = H
WHEN C2 = H
A1
A3
L
B1
A2
A4
L
B2
B4
L
Σ1
Σ3
L
Σ2
Σ4
L
C2
C4
L
Σ1
Σ3
H
L
Σ2
Σ4
L
C2
C4
L
B3
L
H
L
L
L
L
H
H
L
L
L
H
H
H
H
L
L
H
H
L
L
L
L
L
L
L
H
L
L
L
H
H
H
H
L
L
H
H
L
L
H
H
H
H
L
L
L
L
L
H
L
L
L
H
H
L
L
H
H
H
L
H
H
L
L
L
L
L
H
L
L
H
L
H
H
L
L
H
H
H
H
H
H
H
H
L
H
H
H
L
H
L
H
L
L
L
H
H
L
L
H
H
H
H
H
H
H
H
H
L
L
L
L
L
H
L
L
H
H
H
H
H
H
H
L
L
H
H
H
H
L
L
L
H
L
L
H
H
L
L
H
H
H
H
H
L
L
H
H
H
NOTE: Input conditions at A1, B1, A2, B2, and C0 are used to determine outputs Σ1
and Σ2 and the value of the internal carry C2. The values at C2, A3, B3, A4,
and B4 are then used to determine outputs Σ3, Σ4, and C4.
†
absolute maximum ratings over operating free-air temperature range (unless otherwise noted)
Supply voltage range, V
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –0.5 V to 7 V
CC
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.
2–3
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
SN54F283, SN74F283
4-BIT BINARY FULL ADDERS
WITH FAST CARRY
SDFS069A – D2932, MARCH 1987 – REVISED OCTOBER 1993
recommended operating conditions
SN54F283
SN74F283
UNIT
MIN NOM
MAX
MIN NOM
MAX
V
V
V
Supply voltage
4.5
2
5
5.5
4.5
2
5
5.5
V
V
CC
IH
IL
High-level input voltage
Low-level input voltage
Input clamp current
0.8
–18
– 1
0.8
–18
– 1
20
V
I
I
I
mA
mA
mA
°C
IK
High-level output current
Low-level output current
Operating free-air temperature
OH
OL
20
T
A
–55
125
0
70
electrical characteristics over recommended operating free-air temperature range (unless
otherwise noted)
SN54F283
SN74F283
PARAMETER
TEST CONDITIONS
UNIT
V
†
†
MIN TYP
MAX
MIN TYP
MAX
V
V
V
V
CC
V
CC
V
CC
V
CC
V
CC
V
CC
= 4.5 V,
= 4.5 V
= 4.75 V,
= 4.5 V
= 5.5 V,
= 5.5 V,
I = –18 mA
I
–1.2
–1.2
IK
I
I
I
= – 1 mA
= – 1 mA
= 20 mA
2.5
3.4
0.3
2.5
2.7
3.4
0.3
OH
OH
OL
V
OH
OL
0.5
0.1
0.5
0.1
V
I
I
V = 7 V
I
mA
µA
I
IH
V = 2.7 V
I
20
20
Any A or B
C0
– 1.2
– 0.6
–150
55
– 1.2
– 0.6
–150
55
I
V
= 5.5 V,
V = 0.5 V
mA
IL
CC
I
‡
I
I
V
V
= 5.5 V,
= 5.5 V,
V = 0
O
–60
–60
mA
mA
OS
CC
CC
V = 4.5 V
I
36
36
CC
†
‡
All typical values are at V
= 5 V, T = 25°C.
A
CC
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)
V
C
R
= 5 V,
= 50 pF,
= 500 Ω,
= 25°C
V
C
R
= 4.5 V to 5.5 V,
= 50 pF,
CC
L
L
CC
L
L
= 500Ω,
= MIN to MAX
FROM
(INPUT)
TO
(OUTPUT)
§
PARAMETER
UNIT
T
A
T
A
′F283
TYP
6.6
6.6
6.6
6.6
5.3
5
SN54F283
SN74F283
MIN
2.7
3.2
3.2
2.7
2.7
2.2
2.7
2.2
MAX
9.5
9.5
9.5
9.5
7.5
7
MIN
2.7
3.2
3.2
2.7
2.7
2.2
2.7
2.2
MAX
MIN
2.7
3.2
3.2
2.7
2.7
2.2
2.7
2.2
MAX
t
t
t
t
t
t
t
t
14
14
10.5
10.5
10.5
10.5
8.5
8
PLH
PHL
PLH
PHL
PLH
PHL
PLH
PHL
C0
A or B
C0
Σ
ns
ns
ns
ns
14
Σ
14
10.5
10
C4
C4
5.3
4.9
7.5
7
10.5
10
8.5
8
A or B
§
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.
2–4
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
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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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