Cautions Keep safety first your circuit designs! Renesas Technolo

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Cautions Keep safety first your circuit designs! Renesas Technolo

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Cautions
Keep safety first your circuit designs! Renesas Technology Corporation puts maximum effort into making semiconductor products better more reliable, there always possibility that trouble occur with them. Trouble with semiconductors lead personal injury, fire property damage. Remember give consideration safety when making your circuit designs, with appropriate measures such placement substitutive, auxiliary circuits, (ii) nonflammable material (iii) prevention against malfunction mishap. Notes regarding these materials These materials intended reference assist customers selection Renesas Technology Corporation product best suited customer's application; they convey license under intellectual property rights, other rights, belonging Renesas Technology Corporation third party. Renesas Technology Corporation assumes responsibility damage, infringement third-party's rights, originating product data, diagrams, charts, programs, algorithms, circuit application examples contained these materials. information contained these materials, including product data, diagrams, charts, programs algorithms represents information products time publication these materials, subject change Renesas Technology Corporation without notice product improvements other reasons. therefore recommended that customers contact Renesas Technology Corporation authorized Renesas Technology Corporation product distributor latest product information before purchasing product listed herein. information described here contain technical inaccuracies typographical errors. Renesas Technology Corporation assumes responsibility damage, liability, other loss rising from these inaccuracies errors. Please also attention information published Renesas Technology Corporation various means, including Renesas Technology Corporation Semiconductor home page (http://www.renesas.com). When using information contained these materials, including product data, diagrams, charts, programs, algorithms, please sure evaluate information total system before making final decision applicability information products. Renesas Technology Corporation assumes responsibility damage, liability other loss resulting from information contained herein. Renesas Technology Corporation semiconductors designed manufactured device system that used under circumstances which human life potentially stake. Please contact Renesas Technology Corporation authorized Renesas Technology Corporation product distributor when considering product contained herein specific purposes, such apparatus systems transportation, vehicular, medical, aerospace, nuclear, undersea repeater use. prior written approval Renesas Technology Corporation necessary reprint reproduce whole part these materials. these products technologies subject Japanese export control restrictions, they must exported under license from Japanese government cannot imported into country other than approved destination. diversion reexport contrary export control laws regulations Japan and/or country destination prohibited. Please contact Renesas Technology Corporation further details these materials products contained therein.
HD74AC182/HD74ACT182
Carry Lookahead Generator
ADE-205-378 1st. Edition Sep. 2000 Description
HD74AC182/HD74ACT182 high-speed carry lookahead generator. generally used with HD74AC181 HD74AC381 4-bit arithmetic logic unit provide high-speed lookahead over word lengths more than four bits.
Features
Outputs Source/Sink HD74ACT182 TTL-Compatible Inputs
Arrangement
(Top view)
Cn+X Cn+y Cn+z
HD74AC182/HD74ACT182
Logic Symbol
Cn+x Cn+y Cn+z
Names
Carry Input Carry Generate Inputs (Active Low) Carry Generate Input (Active Low) Carry Generate Input (Active Low) Carry Propagate Inputs (Active Low) Carry Propagate Input (Active Low) Carry Propagate Input (Active Low) Carry Outputs Carry Generate Output (Active Low) Carry Propagate Output (Active Low)
HD74AC182/HD74ACT182
Logic Diagram
Cn+x
Cn+y
Cn+z
Please note that this diagram provided only understanding logic operations should used estimate propagation delays.
Functional Description
HD74AC182/HD74ACT182 carry lookahead generator accepts four pairs Active Carry Propagate Carry Generate signals Active High Carry input (Cn) provides anticipated Active High carries across four groups binary adders. HD74AC182/HD74ACT182 also Active Carry Propagate Carry Generate outputs which used further level lookahead. logic equations provided outputs are: P0Cn P1G0 P1P0C P2G1 P2P1G0 P2P1P P3G2 P3P2G1 P3P2P Also, HD74AC182/HD74ACT182 used with binary ALUs active active High input operand mode. connections (Figure from carry lookahead generator identical both cases. Carries rippled between lookahead blocks. critical speed path follows circled numbers. There several possible arrangements carry interconnects, achieve about same speed. 28-bit formed dropping last HD74AC182/HD74ACT182.
HD74AC182/HD74ACT182
Truth Table
Inputs High Voltage Level Voltage Level Immaterial Outputs
HD74AC182/HD74ACT182
Characteristics (unless otherwise specified)
Item Maximum quiescent supply current Maximum quiescent supply current Maximum ICC/input (HD74ACT182) Symbol Unit Condition ground, Worst case ground, 25°C Worst case
Characteristics: HD74AC182
+25°C Item Propagation delay Propagation delay Propagation delay Propagation delay Propagation delay Propagation delay Note: Symbol (V)*1 10.5 11.5 10.5 10.5 12.0 10.0 12.0 10.0 13.0 10.5 14.0 11.5 -40°C +85°C 11.5 11.5 13.0 11.0 13.0 11.0 14.0 11.5 15.5 12.5 Unit
Voltage Range Voltage Range
HD74AC182/HD74ACT182
Characteristics: HD74ACT182
+25°C Item Propagation delay Propagation delay Propagation delay Propagation delay Propagation delay Propagation delay Note: Symbol (V)*1 10.0 10.0 11.0 11.0 11.0 12.5 -40°C +85°C 10.0 11.0 12.0 12.0 12.0 13.5 Unit
Voltage Range
Capacitance
Item Input capacitance Power dissipation capacitance Symbol 50.0 Unit Condition
HD74AC182/HD74ACT182
Package Dimensions
Unit:
19.20 20.00
1.11
7.40
6.30
0.51
2.54 5.06
7.62
2.54 0.25
0.48 0.10
0.25 0.05
Hitachi Code JEDEC EIAJ Mass (reference value)
0.13
DP-16 Conforms Conforms 1.07
Unit:
10.06 10.5
*0.22 0.05 0.20 0.04
0.80
0.20 7.80 0.30
2.20
1.15 0.70 0.20
1.27 *0.42 0.08 0.40 0.06
0.12
Hitachi Code JEDEC EIAJ Mass (reference value) FP-16DA Conforms 0.24
*Dimension including plating thickness Base material dimension
0.10 0.10
0.15
HD74AC182/HD74ACT182
Unit:
10.3
3.95
1.27 0.635
0.14 0.04 1.75 *0.22 0.03 0.20 0.03
0.11
6.10 0.30
1.08
0.10
0.67 0.60 0.20
*0.42 0.08 0.40 0.06
0.15 0.25
*Dimension including plating thickness Base material dimension
Hitachi Code JEDEC EIAJ Mass (reference value)
FP-16DN Conforms Conforms 0.15
Unit:
5.00 5.30
4.40
0.08 *0.22 0.07
0.65 6.40 0.20 0.50 0.10
0.20 0.06
0.13 0.65
*0.17 0.05 0.15 0.04
1.10
0.10
0.07 +0.03 -0.04
*Dimension including plating thickness Base material dimension
Hitachi Code JEDEC EIAJ Mass (reference value)
TTP-16DA 0.05
HD74AC182/HD74ACT182
Cautions
Hitachi neither warrants grants licenses rights Hitachi's third party's patent, copyright, trademark, other intellectual property rights information contained this document. Hitachi bears responsibility problems that arise with third party's rights, including intellectual property rights, connection with information contained this document. Products product specifications subject change without notice. Confirm that have received latest product standards specifications before final design, purchase use. Hitachi makes every attempt ensure that products high quality reliability. However, contact Hitachi's sales office before using product application that demands especially high quality reliability where failure malfunction directly threaten human life cause risk bodily injury, such aerospace, aeronautics, nuclear power, combustion control, transportation, traffic, safety equipment medical equipment life support. Design your application that product used within ranges guaranteed Hitachi particularly maximum rating, operating supply voltage range, heat radiation characteristics, installation conditions other characteristics. Hitachi bears responsibility failure damage when used beyond guaranteed ranges. Even within guaranteed ranges, consider normally foreseeable failure rates failure modes semiconductor devices employ systemic measures such failsafes, that equipment incorporating Hitachi product does cause bodily injury, fire other consequential damage operation Hitachi product. This product designed radiation resistant. permitted reproduce duplicate, form, whole part this document without written approval from Hitachi. Contact Hitachi's sales office questions regarding this document Hitachi semiconductor products.
Hitachi, Ltd.
Semiconductor Integrated Circuits. Nippon Bldg., 2-6-2, Ohte-machi, Chiyoda-ku, Tokyo 100-0004, Japan Tel: Tokyo (03) 3270-2111 Fax: (03) 3270-5109
NorthAmerica Europe Asia Japan
http://sicapac.hitachi-asia.com
Hitachi Asia Ltd. Hitachi Tower Collyer Quay #20-00, Singapore 049318 <65>-538-6533/538-8577 <65>-538-6933/538-3877 http://www.hitachi.com.sg Hitachi Asia Ltd. (Taipei Branch Office) 4/F, 167, North Road, Hung-Kuo Building, Taipei (105), Taiwan <886>-(2)-2718-3666 <886>-(2)-2718-8180 Telex 23222 HAS-TP http://www.hitachi.com.tw Hitachi Asia (Hong Kong) Ltd. Group (Electronic Components) 7/F., North Tower, World Finance Centre, Harbour City, Canton Road Tsim Tsui, Kowloon, Hong Kong <852>-(2)-735-9218 <852>-(2)-730-0281 http://www.hitachi.com.hk
further information write
Hitachi Semiconductor (America) Inc. East Tasman Drive, Jose,CA 95134 Tel: (408) 433-1990 Fax: <1>(408) 433-0223 Hitachi Europe GmbH Electronic Components Group Dornacher Strae D-85622 Feldkirchen, Munich Germany Tel: <49> (89) 9180-0 Fax: <49> (89) Hitachi Europe Ltd. Electronic Components Group. Whitebrook Park Lower Cookham Road Maidenhead Berkshire 8YA, United Kingdom Tel: <44> (1628) 585000 Fax: <44> (1628) 585160
Copyright Hitachi, Ltd., 2000. rights reserved. Printed Japan.
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