MM74HC181

更新时间： 2024-11-21 04:20:39

品牌	Logo	应用领域
美国国家半导体 - NSC		/
页数	文件大小	规格书
10页	154K
描述
Arithmetic Logic Units/Function Generators

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中文翻译

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数据手册

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MM74HC181 数据手册

January 1988

MM54HC181/MM74HC181

Arithmetic Logic Units/Function Generators

General Description

These arithmetic logic units (ALU)/function generators uti-

lize advanced silicon-gate CMOS technology. They possess

the high noise immunity and low power consumption of

standard CMOS integrated circuits, as well as the ability to

drive 10 LS-TTL loads.

If high speed is not of importance, a ripple-carry input (C )

and a ripple-carry output (C

4) are available. However,

the ripple-carry delay has also been minimized so that arith-

metic manipulations for small word lengths can be per-

formed without external circuitry.

The MM54HC181/MM74HC181 are arithmetic logic unit

(ALU)/function generators that have a complexity of 75

equivalent gates on a monolithic chip. These circuits per-

form 16 binary arithmetic operations on two 4-bit words as

shown in Tables 1 and 2. These operations are selected by

the four function-select lines (S0, S1, S2, S3) and include

addition, subtraction, decrement, and straight transfer.

When performing arithmetic manipulations, the internal car-

ries must be enabled by applying a low-level voltage to the

mode control input (M). A full carry look-ahead scheme is

made available in these devices for fast, simultaneous carry

generation by means of two cascade-outputs (pins 15 and

17) for the four bits in the package. When used in conjunc-

tion with the MM54HC182 or MM74HC182, full carry look-

ahead circuits, high-speed arithmetic operations can be per-

formed. The method of cascading HC182 circuits with these

ALU’s to provide multi-level full carry look-ahead is illustrat-

ed under typical applications data for the MM54HC182/

MM74HC182.

Features

Full look-ahead for high-speed operations on

long words

Arithmetic operating modes:

Addition

Subtraction

Shift operand a one position magnitude comparison

Plus twelve other arithmetic operations

Logic function modes:

Exclusive-OR

Comparator

AND, NAND, OR, NOR

Plus ten other logic operations

Wide operating voltage range: 2V–6V

Low input current: 1 mA maximum

Low quiescent current: 80 mA maximum

Connection Diagram

Pin Designations

Dual-In-Line Package

Designation

A3, A2, A1, A0

B3, B2, B1, B0

Pin Nos.

Function

19, 21, 23, 2

18, 20, 22, 1

Word A Inputs

Word B Inputs

Function-Select

Inputs

S3, S2, S1, S0

3, 4, 5, 6

Inv. Carry Input

Mode Control

Input

F3, F2, F1, F0

13, 11, 10, 9

Function Outputs

Comparator Outputs

Carry Propagate

Output

Inv. Carry Output

Carry Generate

Output

Supply Voltage

Ground

TL/F/5320–1

Top View

GND

Order Number MM54HC181 or MM74HC181

1995 National Semiconductor Corporation

TL/F/5320

RRD-B30M105/Printed in U. S. A.

12 3 4 5 6 7...10

中文翻译

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与MM74HC181相关器件

型号	品牌	获取价格	描述	数据表
MM74HC181J	NSC	获取价格	Arithmetic Logic Units/Function Generators
MM74HC181N	NSC	获取价格	Arithmetic Logic Units/Function Generators
MM74HC181N/A+	NSC	获取价格	IC,FIXED POINT ALU,HC-CMOS,DIP,24PIN,PLASTIC
MM74HC181N/B+	NSC	获取价格	IC,FIXED POINT ALU,HC-CMOS,DIP,24PIN,PLASTIC
MM74HC181WM	ROCHESTER	获取价格	HC/UH SERIES, 4-BIT ARITHMETIC LOGIC UNIT, PDSO24, PLASTIC, SO-24
MM74HC181WMX	TI	获取价格	HC/UH SERIES, 4-BIT ARITHMETIC LOGIC UNIT, PDSO24, PLASTIC, SO-24
MM74HC182J/A+	TI	获取价格	IC,LOOK-AHEAD CARRY GENERATOR,HC-CMOS,DIP,16PIN,CERAMIC
MM74HC182M	TI	获取价格	IC HC/UH SERIES, 4-BIT LOOK-AHEAD CARRY GENERATOR, PDSO16, PLASTIC, SO-16, Arithmetic Circ
MM74HC182M/A+	TI	获取价格	IC,LOOK-AHEAD CARRY GENERATOR,HC-CMOS,SOP,16PIN,PLASTIC
MM74HC182N	TI	获取价格	HC/UH SERIES, 4-BIT LOOK-AHEAD CARRY GENERATOR, PDIP16, N16E, 16 PIN

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