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參數(shù)資料
| 型號(hào)： | SN54F283FK |
| 廠商： | Texas Instruments, Inc. |
| 英文描述： | 4-BIT BINARY FULL ADDERS WITH FAST CARRY |
| 中文描述： | 4位二進(jìn)制全加器與快速進(jìn) |
| 文件頁(yè)數(shù)： | 1/5頁(yè) |
| 文件大小： | 81K |
| 代理商： | SN54F283FK |
SN54F283, SN74F283
4-BIT BINARY FULL ADDERS
WITH FAST CARRY
SDFS069A – D2932, MARCH 1987 – REVISED OCTOBER 1993
Copyright
1993, Texas Instruments Incorporated
2–1
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 (
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
performance at the economy and reduced
package count of a ripple-carry implementation.
partial
look-ahead
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
Σ
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
Σ
1
Σ
2
Σ
3
4
0
1
13
10
3
Σ
4
P
Q
Σ
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
Σ
3
NC
A4
B4
A2
Σ
1
NC
A1
B1
SN54F283 . . . FK PACKAGE
(TOP VIEW)
B
Σ
2
N
C
4
Σ
B
C
G
N
NC – No internal connection
V
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
Σ
2
B2
A2
Σ
1
A1
B1
C0
GND
V
CC
B3
A3
Σ
3
A4
B4
Σ
4
C4
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.
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