MM74HCT688

更新时间： 2024-11-23 05:08:31

品牌	Logo	应用领域
美国国家半导体 - NSC		比较器
页数	文件大小	规格书
4页	106K
描述
8-Bit Magnitude Comparator (Equality Detector)

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数据手册

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MM74HCT688 数据手册

February 1988

MM54HCT688/MM74HCT688

8-Bit Magnitude Comparator (Equality Detector)

General Description

This equality detector utilizes advanced silicon-gate CMOS

MM54HCT/MM74HCT devices are intended to interface be-

tween TTL and NMOS components and standard CMOS

devices. These parts are also plug in replacements for LS-

TTL devices and can be used to reduce power consumption

in existing designs.

technology to compare bit for bit two 8-bit words and indi-

cate whether or not they are equal. The P Q output indi-

cates equality when it is low. A single active low enable is

provided to facilitate cascading of several packages and en-

able comparison of words greater than 8 bits.

All inputs are protected from damage due to static dis-

charge by diodes to V

This device is useful in memory block decoding applica-

tions, where memory block enable signals must be generat-

ed from computer address information.

and ground.

Features

The comparator combines the low power consumption of

CMOS, but inputs are compatible with TTL logic levels, and

the output can drive 10 low power Schottky equivalent

loads.

TTL input compatible

Typical propagation delay: 20 ns

Low quiescent current: 80 mA maximum (74HCT Series)

Large output current: 4 mA

Same as HCT521

Logic Diagrams

TL/F/5371–2

1995 National Semiconductor Corporation

TL/F/5371

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

12 3 4

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MM74HCT688J	NSC	获取价格	IC HCT SERIES, 8-BIT IDENTITY COMPARATOR, INVERTED OUTPUT, CDIP20, DIP-20, Arithmetic Circ
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MM74HCT688N	NSC	获取价格	IC HCT SERIES, 8-BIT IDENTITY COMPARATOR, INVERTED OUTPUT, PDIP20, DIP-20, Arithmetic Circ
MM74HCT688N/A+	TI	获取价格	IC,MAGNITUDE COMPARATOR,HCT-CMOS,DIP,20PIN,PLASTIC
MM74HCT688N/B+	TI	获取价格	IC,MAGNITUDE COMPARATOR,HCT-CMOS,DIP,20PIN,PLASTIC
MM74HCT688WM	TI	获取价格	HCT SERIES, 8-BIT IDENTITY COMPARATOR, INVERTED OUTPUT, PDSO20, PLASTIC, SO-20
MM74HCT688WM/A+	TI	获取价格	IC,MAGNITUDE COMPARATOR,HCT-CMOS,SOP,20PIN,PLASTIC
MM74HCT688WMX	TI	获取价格	HCT SERIES, 8-BIT IDENTITY COMPARATOR, INVERTED OUTPUT, PDSO20, PLASTIC, SO-20
MM74HCT688WMX	ROCHESTER	获取价格	HCT SERIES, 8-BIT IDENTITY COMPARATOR, INVERTED OUTPUT, PDSO20, PLASTIC, SO-20
MM74HCT74	FAIRCHILD	获取价格	Dual D-Type Flip-Flop with Preset and Clear