Datasheet > 74F182

74F182

更新时间： 2024-09-24 22:45:55

品牌	Logo	应用领域
恩智浦 - NXP		/
页数	文件大小	规格书
6页	58K
描述
Look-ahead carry generator

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中文翻译

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数据手册

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74F182 数据手册

Philips Semiconductors

Product specification

Look-ahead carry generator

74F182

FEATURES

PIN CONFIGURATION

• Provides carry look-ahead across a group of four ALUs

• Multi-level look-ahead for high speed arithmetic operation over

long word lengths

15 P2

14 G2

DESCRIPTION

13 Cn

The 74F182 is a high speed carry look-ahead generator. It accepts

up to four pairs of active-Low Carry Propagate (P0, P1, P2, P3) and

Carry Generate (G0, G1, G2, G3) signals and an active-High Carry

input (Cn) and provides anticipated active-High carries (Cn+x, Cn+y,

Cn+z) across four groups of binary adders. The 74F182 also has

active-Low Carry Propagate (P) Carry Generate (G) outputs which

may be used for further levels of look-ahead.

12 Cn+x

11 Cn+y

GND

Cn+z

SF00725

The logic equations provided at the outputs are:

Cn+x = G0+P0Cn

TYPICAL

PROPAGATION

DELAY

TYPICAL

SUPPLY CURRENT

(TOTAL)

Cn+y = G1+P1G0+P1P0Cn

Cn+z = G2+P2G1+P2P1G0+P2P1P0Cn

G = G3+P3G2+P3P2G1+P3P2P1G0

P = P3P2P1P0

TYPE

74F182

5.0ns

21mA

The 74F182 can also be used with binary ALUs in an active-Low or

active-High input operand mode. The connections to and from the

ALU to the carry look-ahead generator are identical in both cases.

ORDERING INFORMATION

ORDER CODE

DESCRIPTION

COMMERCIAL RANGE

= 5V ±10%, T

= 0°C to +70°C

amb

16-pin plastic DIP

16-pin plastic SO

N74F182N

N74F182D

INPUT AND OUTPUT LOADING AND FAN-OUT TABLE

PINS

DESCRIPTION

74FAST (U.L.) HIGH/LOW

LOAD VALUE HIGH/LOW

50µA/1.2mA

Carry input

2.5/2.0

2.5/14.0

2.5/16.0

2.5/8.0

2.5/6.0

2.5/4.0

50/33

G0, G2

Carry generate inputs (active-Low)

Carry generate input (active-Low)

Carry propagate inputs (active-Low)

Carry propagate input (active-Low)

Carry outputs

50µA/8.4mA

50µA/9.6mA

50µA/4.8mA

P0, P1

50µA/4.8mA

50µA/3.6mA

50µA/2.4mA

Cn+x–Cn+z

1.0mA/20mA

Carry generate output (active-Low)

Carry propagate output (active-Low)

50/33

NOTE:

One (1.0) FAST unit load is defined as: 20µA in the High state and 0.6mA in the Low state.

1991 Apr 15

853–1161 02162

12 3 4 5 6

中文翻译

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与74F182相关器件

型号	品牌	获取价格	描述	数据表
74F182D	YAGEO	获取价格	Look-Ahead Carry Generator, F/FAST Series, 4-Bit, TTL, PDSO16,
74F182DC	FAIRCHILD	获取价格	Look-Ahead Carry Generator, F/FAST Series, 4-Bit, TTL, CDIP16, CERAMIC, DIP-16
74F182DCQM	ROCHESTER	获取价格	Look-Ahead Carry Generator,
74F182DCQR	ROCHESTER	获取价格	Look-Ahead Carry Generator, F/FAST Series, 4-Bit, TTL, CDIP16, CERAMIC, DIP-16
74F182D-T	YAGEO	获取价格	Look-Ahead Carry Generator, F/FAST Series, 4-Bit, TTL, PDSO16,
74F182FC	FAIRCHILD	获取价格	Look-Ahead Carry Generator, TTL, CDFP16,
74F182FCQM	FAIRCHILD	获取价格	Look-Ahead Carry Generator, TTL, CDFP16,
74F182FCQM	ROCHESTER	获取价格	Look-Ahead Carry Generator,
74F182FCQR	FAIRCHILD	获取价格	Look-Ahead Carry Generator, TTL, CDFP16,
74F182L1C	FAIRCHILD	获取价格	Look-Ahead Carry Generator, F/FAST Series, 4-Bit, TTL, CQCC20, CERAMIC, LCC-20