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參數資料
| 型號： | MM74HCT688J |
| 廠商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分類： | 算術邏輯單元 |
| 英文描述： | HCT SERIES, 8-BIT IDENTITY COMPARATOR, INVERTED OUTPUT, CDIP20 |
| 封裝： | DIP-20 |
| 文件頁數： | 1/4頁 |
| 文件大小： | 101K |
| 代理商： | MM74HCT688J |
TLF5371
MM54HCT688MM74HCT688
8-Bit
Magnitude
Comparator
(Equality
Detector)
February 1988
MM54HCT688MM74HCT688
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-
cate 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 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
MM54HCTMM74HCT 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
All inputs are protected from damage due to static dis-
charge by diodes to VCC and ground
Features
Y
TTL input compatible
Y
Typical propagation delay 20 ns
Y
Low quiescent current 80 mA maximum (74HCT Series)
Y
Large output current 4 mA
Y
Same as HCT521
Logic Diagrams
TLF5371 – 2
C1995 National Semiconductor Corporation
RRD-B30M105Printed in U S A
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相關代理商/技術參數 |
參數描述 |
|---|---|
| MM74HCT688WM92 | 制造商:National Semiconductor 功能描述:74HCT688 36/TUBE NSC S1I2B |
| MM74HCT688WMX | 制造商:Rochester Electronics LLC 功能描述:- Bulk |
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| MM74HCT74_05 | 制造商:FAIRCHILD 制造商全稱:Fairchild Semiconductor 功能描述:Dual D-Type Flip-Flop with Preset and Clear |
| MM74HCT74_08 | 制造商:FAIRCHILD 制造商全稱:Fairchild Semiconductor 功能描述:MM74HCT74 Dual D-Type Flip-Flop with Preset and Clear |
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