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参数资料
| 型号： | MM74HC688J |
| 厂商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分类： | 算术逻辑单元 |
| 英文描述： | HC/UH SERIES, 8-BIT IDENTITY COMPARATOR, INVERTED OUTPUT, CDIP20 |
| 封装： | DIP-20 |
| 文件页数： | 1/4页 |
| 文件大小： | 120K |
| 代理商： | MM74HC688J |
TLF5018
MM54HC688MM74HC688
8-Bit
Magnitude
Comparator
(Equality
Detector)
January 1988
MM54HC688MM74HC688
8-Bit Magnitude Comparator (Equality Detector)
General Description
This equality detector utilizes advanced silicon-gate CMOS
technology to compare bit for bit two 8-bit words and indi-
cates whether or not they are equal The PeQ 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
This device is useful in memory block decoding applica-
tions where memory block enable signals must be generat-
ed from computer address information
The comparator’s output can drive 10 low power Schottky
equivalent loads This comparator is functionally and pin
compatible to the 54LS68874LS688 All inputs are protect-
ed from damage due to static discharge by diodes to VCC
and ground
Features
Y
Typical propagation delay 20 ns
Y
Wide power supply range 2 – 6V
Y
Low quiescent current 80 mA (74 Series)
Y
Large output current 4 mA (74 Series)
Y
Same as ’HC521
Connection and Logic Diagrams
Dual-In-Line Package
TLF5018 – 1
Top View
Order Number MM54HC688 or MM74HC688
Truth Table
Inputs
Data
Enable
PQ
G
PeQ
P e QL
L
P l QL
H
P k QL
H
XH
H
TLF5018 – 2
C1995 National Semiconductor Corporation
RRD-B30M115Printed in U S A
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MM74HC688MTC | 功能描述:校验器 IC 8-Bit Mag Comparator RoHS:否 制造商:STMicroelectronics 产品: 比较器类型: 通道数量: 输出类型:Push-Pull 电源电压-最大:5.5 V 电源电压-最小:1.1 V 补偿电压（最大值）:6 mV 电源电流（最大值）:1350 nA 响应时间: 最大工作温度:+ 125 C 安装风格:SMD/SMT 封装 / 箱体:SC-70-5 封装:Reel |
| MM74HC688MTC_Q | 功能描述:校验器 IC 8-Bit Mag Comparator RoHS:否 制造商:STMicroelectronics 产品: 比较器类型: 通道数量: 输出类型:Push-Pull 电源电压-最大:5.5 V 电源电压-最小:1.1 V 补偿电压（最大值）:6 mV 电源电流（最大值）:1350 nA 响应时间: 最大工作温度:+ 125 C 安装风格:SMD/SMT 封装 / 箱体:SC-70-5 封装:Reel |
| MM74HC688MTCX | 功能描述:校验器 IC 8-Bit Mag Comparator RoHS:否 制造商:STMicroelectronics 产品: 比较器类型: 通道数量: 输出类型:Push-Pull 电源电压-最大:5.5 V 电源电压-最小:1.1 V 补偿电压（最大值）:6 mV 电源电流（最大值）:1350 nA 响应时间: 最大工作温度:+ 125 C 安装风格:SMD/SMT 封装 / 箱体:SC-70-5 封装:Reel |
| MM74HC688N | 功能描述:校验器 IC 8-Bit Mag Comparator RoHS:否 制造商:STMicroelectronics 产品: 比较器类型: 通道数量: 输出类型:Push-Pull 电源电压-最大:5.5 V 电源电压-最小:1.1 V 补偿电压（最大值）:6 mV 电源电流（最大值）:1350 nA 响应时间: 最大工作温度:+ 125 C 安装风格:SMD/SMT 封装 / 箱体:SC-70-5 封装:Reel |
| MM74HC688N | 制造商:Fairchild Semiconductor Corporation 功能描述:IC 74HC CMOS 74HC688 DIP20 6V |
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