数据搜索系统,热门电子元器件搜索
Selected language     Chinese  ▼
部分名称
         详细搜索


54F182LM Datasheet(数据表) 2 Page - National Semiconductor (TI)

[Old version datasheet] Texas Instruments acquired National semiconductor.
部件型号  54F182LM
说明  Carry Lookahead Generator
下载  8 Pages
Scroll/Zoom Zoom In 100% Zoom Out
制造商  NSC [National Semiconductor (TI)]
网页  http://www.national.com
标志 

   
 2 page
background image
Unit LoadingFan Out
54F74F
Pin Names
Description
UL
Input IIH IIL
HIGHLOW
Output IOH IOL
Cn
Carry Input
1020
20 mA b12 mA
G0 G2
Carry Generate Inputs (Active LOW)
10140
20 mA b84 mA
G1
Carry Generate Input (Active LOW)
10160
20 mA b96 mA
G3
Carry Generate Input (Active LOW)
1080
20 mA b48 mA
P0 P1
Carry Propagate Inputs (Active LOW)
1080
20 mA b48 mA
P2
Carry Propagate Input (Active LOW)
1060
20 mA b36 mA
P3
Carry Propagate Input (Active LOW)
1040
20 mA b24 mA
CnaxbCnaz
Carry Outputs
50333
b
1 mA20 mA
G
Carry Generate Output (Active LOW)
50333
b
1 mA20 mA
P
Carry Propagate Output (Active LOW)
50333
b
1 mA20 mA
Functional Description
The ’F182 carry lookahead generator accepts up to four
pairs of Active LOW Carry Propagate (P0–P3) and Carry
Generate (G0–G3) signals and an Active HIGH Carry input
(Cn) and provides anticipated Active HIGH carries (Cn a x
Cnay Cnaz) across four groups of binary adders The
’F182 also has Active LOW Carry Propagate (P) and Carry
Generate (G) outputs which may be used for further levels
of lookahead The logic equations provided at the outputs
are
Cnax e G0 a P0Cn
Cnay e G1 a P1G0 a P1P0Cn
Cnaz e G2 a P2G1 a P2P1G0 a P2P1P0Cn
G
e
G3 a P3G2 a P3P2G1 a P3P2P1G0
P
e
P2P2P1P0
Also the ’F182 can be used with binary ALUs in an active
LOW or active HIGH input operand mode The connections
(Figure 1) to and from the ALU to the carry lookahead gen-
erator are identical in both cases Carries are rippled be-
tween lookahead blocks The critical speed path follows the
circled numbers There are several possible arrangements
for the carry interconnects but all achieve about the same
speed A 28-bit ALU is formed by dropping the last ’F181 or
’F381
TLF9492 – 5
FIGURE 1 32-Bit ALU with Rippled Carry between 16-Bit Lookahead ALUs
ALUs may be either ’F181 or ’F381
2




HTML 页

1  2  3  4  5  6  7  8 


数据表 下载



相关电子零件

部件型号部件说明Html View制造商
74F182Carry Lookahead Generator 1 2 3 4 5 MoreFairchild Semiconductor
SN54LS182CARRY LOOKAHEAD GENERATOR LOW POWER SCHOTTKY 1 2 3 4 Motorola, Inc
HD74HC182Look-Ahead Carry Generator 1 2 3 4 5 MoreHitachi Semiconductor
CD40182BMSCMOS Look-Ahead Carry Generator 1 2 3 4 5 MoreIntersil Corporation
74F182Look-ahead carry generator 1 2 3 4 5 MoreNXP Semiconductors
100179Carry Look-Ahead Generator 1 2 3 4 5 MoreNXP Semiconductors
74HC182Look-ahead carry generator 1 2 3 4 5 MoreNXP Semiconductors
DM74S182Look-Ahead Carry Generator 1 2 3 4 5 Fairchild Semiconductor
HCC40182BLOOK-AHEAD CARRY GENERATOR 1 2 3 4 5 MoreSTMicroelectronics
HD74AC182Carry Lookhead Generator 1 2 3 4 5 MoreHitachi Semiconductor

链接网址

ALLDATASHEET是否为您带来帮助?  [ DONATE ]  

关于 Alldatasheet    |   广告服务   |   联系我们   |   隐私政策   |   书签   |   链接交换   |   制造商名单
All Rights Reserved© Alldatasheet.com


Mirror Sites
English : Alldatasheet.com  , Alldatasheet.net  |   Chinese : Alldatasheetcn.com  |   German : Alldatasheetde.com  |   Japanese : Alldatasheet.jp  |   Russian : Alldatasheetru.com
Korean : Alldatasheet.co.kr   |   Spanish : Alldatasheet.es  |   French : Alldatasheet.fr  |   Italian : Alldatasheetit.com  |   Portuguese : Alldatasheetpt.com  |   Polish : Alldatasheet.pl