Texas Instruments SN54F283J Datasheet
SN54F283, SN74F283
4-BIT BINARY FULL ADDERS
WITH FAST CARRY
SDFS069A – D2932, MARCH 1987 – REVISED OCTOBER 1993
• 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 (Σ) 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.
SN54F283 ...J PACKAGE
SN74F283 ...D OR N PACKAGE
SN54F283 . . . FK PACKAGE
A2
Σ1
NC
A1
B1
NC – No internal connection
(TOP VIEW)
Σ2
B2
A2
Σ1
A1
B1
C0
GND
(TOP VIEW)
B2ΣNC
3212019
4
5
6
7
8
910111213
C0
1
2
3
4
5
6
7
8
2
GND
16
15
14
13
12
11
10
NC
V
CC
B3
A3
Σ3
A4
B4
Σ4
C4
9
CC
V
B3
A3
18
Σ3
17
NC
16
A4
15
B4
14
4
C4
Σ
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
†
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.
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.
†
Σ
0
P
Σ
3
Q
CO
A1
A2
A3
A4
B1
B2
B3
B4
C0
5
3
14
12
6
2
15
11
7
0
3
0
3
CI
4
Σ1
1
Σ2
13
Σ3
10
Σ4
9
C4
Copyright 1993, Texas Instruments Incorporated
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
2–1
SN54F283, SN74F283
4-BIT BINARY FULL ADDERS
WITH FAST CARRY
SDFS069A – D2932, MARCH 1987 – REVISED OCT OBER 1993
logic diagram (positive logic)
11
B4
12
A4
10
9
C4
Σ4
15
B3
14
A3
2
B2
3
A2
6
B1
5
A1
7
C0
Pin numbers shown are for the D, J, and N packages.
13
Σ3
1
Σ2
4
Σ1
2–2
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
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