參數(shù)資料
型號： SN54AS882AFK
廠商： Texas Instruments, Inc.
英文描述： 32-BIT LOOK-AHEAD CARRY GENERATORS
中文描述： 32位色彩前進位發(fā)生器
文件頁數(shù)： 1/9頁
文件大?。?/td> 139K
代理商： SN54AS882AFK
SN54AS882A, SN74AS882A
32-BIT LOOK-AHEAD CARRY GENERATORS
SDAS235 – D2661, DECEMBER 1982 – REVISED NOVEMBER 1985
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
Copyright
1985, Texas Instruments Incorporated
1
Directly Compatible With ’AS181B,
’AS1181, ’AS881B, and ’AS1881 ALUs
Package Options Include Plastic Small
Outline Packages, Both Plastic and
Ceramic Chip Carriers, and Standard
Plastic and Ceramic 300-mil DIPs
Capable of Anticipating the Carry Across a
Group of Eight 4-Bit Binary Adders
Cascadable to Perform Look-Ahead Across
n-Bit Adders
Typical Carry Time, C
n
to Any C
n+i
, is Less
Than 6 ns
Dependable Texas Instruments Quality and
Reliability
description
The ’AS882A is a high-speed look-ahead carry
generator capable of anticipating the carry across
a group of eight 4-bit adders permitting the
designer to implement look-ahead for a 32-bit ALU
with a single package or, by cascading ’AS882As,
full look-ahead is possible across n-bit adders.
The SN54AS882A is characterized for operation
over the full military temperature range of –55
°
C
to 125
°
C. The SN74AS882A is characterized for
operation from 0
°
C to 70
°
C.
’AS882A LOGIC EQUATIONS
C
n+8
C
n+16
=
=
G1 + P1G0+P1P0C
n
G3 + P3G2 + P3P2G1 + P3P2P1G0
+ P3P2P1P0C
n
G5 + P5G4 + P5P4G3 + P5P4P3G2
+ P5P4P3P2G1 + P5P4P3P2P1G0
+ P5P4P3P2P1P0C
n
G7 + P7G6 + P7P6G5 + P7P6P5G4
+ P7P6P5P4G3 + P7P6P5P4P3G2
+ P7P6P5P4P3P2G1 + P7P6P5P4P3P2P1G0
+ P7P6P5P4P3P2P1P0C
n
C
n+24
=
C
n+32
=
1
2
3
4
5
6
7
8
9
10
11
12
24
23
22
21
20
19
18
17
16
15
14
13
C
n
G0
P0
G1
P1
C
n + 8
G2
P2
G3
P3
C
n – 16
GND
V
CC
NC
C
n + 32
P7
G7
P6
G6
C
n + 24
P5
G5
P4
G4
SN54AS882A . . . JT PACKAGE
SN74AS882A . . . DW OR NT PACKAGE
(TOP VIEW)
3 2 1
13 14
5
6
7
8
9
10
11
P7
G7
P6
NC
G6
C
n + 24
P5
G1
P1
C
n + 8
NC
G2
P2
G3
4
15 16 17 18
G
N
G
P
G
P
G
N
SN54AS882A . . . FK PACKAGE
SN74AS882A . . . DW OR NT PACKAGE
(TOP VIEW)
28 27 2625
24
23
22
21
20
19
12
P
N
n
C
C
C
n
C
NC – No internal connection
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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