MM74HC688

更新时间： 2024-11-20 23:02:43

品牌	Logo	应用领域
飞兆/仙童 - FAIRCHILD		比较器
页数	文件大小	规格书
6页	89K
描述
8-Bit Magnitude Comparator (Equality Detector)

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数据手册

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MM74HC688 数据手册

September 1983

Revised February 1999

MM74HC688

8-Bit Magnitude Comparator (Equality Detector)

The comparator’s output can drive 10 low power Schottky

General Description

equivalent loads. This comparator is functionally and pin

compatible to the 74LS688. All inputs are protected from

damage due to static discharge by diodes to V_CCand

The MM74HC688 equality detector utilizes advanced sili-

con-gate CMOS technology to compare bit for bit two 8-bit

words and indicates whether or not they are equal. The

P=Q output indicates equality when it is LOW. A single

active low enable is provided to facilitate cascading of sev-

eral packages and enable comparison of words greater

than 8 bits.

ground.

Features

■ Typical propagation delay: 20 ns

■ Wide power supply range: 2–6V

■ Low quiescent current: 80 µA (74 Series)

■ Large output current: 4 mA (74 Series)

■ Same as HC521

This device is useful in memory block decoding applica-

tions, where memory block enable signals must be gener-

ated from computer address information.

Ordering Code:

Order Number Package Number

Package Description

MM74HC688WM

MM74HC688SJ

MM74HC688MTC

MM74HC688N

M20B

M20D

MTC20

N20A

20-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-013, 0.300” Wide

20-Lead Small Outline Package (SOP), EIAJ TYPE II, 5.3mm Wide

20-Lead Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153, 4.4mm Wide

20-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300” Wide

Devices also available in Tape and Reel. Specify by appending the suffix letter “X” to the ordering code.

Connection Diagram

Logic Diagram

Pin Assignments for DIP

Top View

Truth Table

Inputs

Data

P,Q

Enable

P = Q

P > Q

P < Q

DS005018.prf

www.fairchildsemi.com

12 3 4 5 6

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与MM74HC688相关器件

型号	品牌	获取价格	描述	数据表
MM74HC688J/A+	NSC	获取价格	IC,MAGNITUDE COMPARATOR,HC-CMOS,DIP,20PIN,CERAMIC
MM74HC688MTC	FAIRCHILD	获取价格	8-Bit Magnitude Comparator (Equality Detector)
MM74HC688MTC	ROCHESTER	获取价格	Magnitude Comparator, HC/UH Series, 8-Bit, Inverted Output, CMOS, PDSO20, 4.40 MM, MO-153,
MM74HC688MTCX	ROCHESTER	获取价格	Magnitude Comparator, HC/UH Series, 8-Bit, Inverted Output, CMOS, PDSO20, 4.40 MM, MO-153,
MM74HC688N	ROCHESTER	获取价格	Magnitude Comparator, HC/UH Series, 8-Bit, Inverted Output, CMOS, PDIP20, 0.300 INCH, PLAS
MM74HC688N	FAIRCHILD	获取价格	8-Bit Magnitude Comparator (Equality Detector)
MM74HC688N/A+	NSC	获取价格	IC,MAGNITUDE COMPARATOR,HC-CMOS,DIP,20PIN,PLASTIC
MM74HC688N_NL	FAIRCHILD	获取价格	暂无描述
MM74HC688SJ	FAIRCHILD	获取价格	8-Bit Magnitude Comparator (Equality Detector)
MM74HC688SJ	ROCHESTER	获取价格	Magnitude Comparator, HC/UH Series, 8-Bit, Inverted Output, CMOS, PDSO20, 5.30 MM, EIAJ TY