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MM74HC123AN

更新时间： 2024-11-17 22:46:07
品牌 Logo 应用领域
美国国家半导体 - NSC 振荡器逻辑集成电路光电二极管PC时钟
页数 文件大小 规格书
6页 200K
描述
Dual Retriggerable Monostable Multivibrator

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中文翻译

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MM74HC123AN 数据手册

 浏览型号MM74HC123AN的Datasheet PDF文件第2页浏览型号MM74HC123AN的Datasheet PDF文件第3页浏览型号MM74HC123AN的Datasheet PDF文件第4页浏览型号MM74HC123AN的Datasheet PDF文件第5页浏览型号MM74HC123AN的Datasheet PDF文件第6页 
January 1988  
MM54HC123A/MM74HC123A  
Dual Retriggerable Monostable Multivibrator  
General Description  
e
The MM54/74HC123A high speed monostable multivibra-  
tors (one shots) utilize advanced silicon-gate CMOS tech-  
nology. They feature speeds comparable to low power  
Schottky TTL circuitry while retaining the low power and  
high noise immunity characteristic of CMOS circuits.  
put pulse equation is simply: PW (R  
) (C  
EXT  
); where PW  
EXT  
is in seconds, R is in ohms, and C is in farads. All inputs are  
protected from damage due to static discharge by diodes to  
V
and ground.  
CC  
Features  
Y
Each multivibrator features both a negative, A, and a posi-  
tive, B, transition triggered input, either of which can be  
used as an inhibit input. Also included is a clear input that  
when taken low resets the one shot. The ’HC123 can be  
triggered on the positive transition of the clear while A is  
held low and B is held high.  
Typical propagation delay: 25 ns  
Y
Wide power supply range: 2V–6V  
Y
Low quiescent current: 80 mA maximum (74HC Series)  
Y
Low input current: 1 mA maximum  
Y
Fanout of 10 LS-TTL loads  
The ’HC123A is retriggerable. That is it may be triggered  
repeatedly while their outputs are generating a pulse and  
the pulse will be extended.  
Y
e
Simple pulse width formula T  
Wide pulse range: 400 ns to  
RC  
Y
Y
Y
%
Part to part variation: 5% (typ)  
(typ)  
g
Pulse width stability over a wide range of temperature and  
supply is achieved using linear CMOS techniques. The out-  
Schmitt Trigger A & B inputs enable infinite signal input  
rise and fall times.  
Connection Diagram  
Dual-In-Line Package  
Timing Component  
Note: Pin 6 and Pin 14 must be  
hard-wired to GND.  
TL/F/5206–2  
TL/F/5206–1  
Top View  
Order Number MM54HC123A or MM74HC123A  
Truth Table  
e
e
e
e
H
High Level  
Inputs  
A
Outputs  
L
Low Level  
Clear  
B
Q
Q
Transition from Low to High  
Transition from High to Low  
One High Level Pulse  
One Low Level Pulse  
Irrelevant  
u
v
L
X
X
H
X
X
X
L
L
H
H
e
É
e
ß
X
L
L
H
e
X
H
H
u
L
É
É
É
ß
ß
ß
u
H
H
v
L
C
1995 National Semiconductor Corporation  
TL/F/5206  
RRD-B30M105/Printed in U. S. A.  
123456

中文翻译

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