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MM74HC123A PDF预览

MM74HC123A

更新时间: 2024-11-17 22:46:07
品牌 Logo 应用领域
飞兆/仙童 - FAIRCHILD 振荡器
页数 文件大小 规格书
9页 118K
描述
Dual Retriggerable Monostable Multivibrator

MM74HC123A 数据手册

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September 1983  
Revised February 1999  
MM74HC123A  
Dual Retriggerable Monostable Multivibrator  
put pulse equation is simply: PW = (REXT) (CEXT); where  
General Description  
PW 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 VCC and ground.  
The MM74HC123A high speed monostable multivibrators  
(one shots) utilize advanced silicon-gate CMOS technol-  
ogy. They feature speeds comparable to low power Schot-  
tky TTL circuitry while retaining the low power and high  
noise immunity characteristic of CMOS circuits.  
Features  
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 MM74HC123A  
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  
Wide power supply range: 2V–6V  
Low quiescent current: 80 µA maximum (74HC Series)  
Low input current: 1 µA maximum  
Fanout of 10 LS-TTL loads  
Simple pulse width formula T = RC  
Wide pulse range: 400 ns to (typ)  
Part to part variation: ±5% (typ)  
The MM74HC123A is retriggerable. That is it may be trig-  
gered repeatedly while their outputs are generating a pulse  
and the pulse will be extended.  
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.  
Ordering Code:  
Order Number  
MM74HC123AM  
MM74HC123ASJ  
MM74HC123AMTC  
MM74HC123AN  
Package Number  
M16A  
Package Description  
16-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-012, 0.150” Narrow  
16-Lead Small Outline Package (SOP), EIAJ TYPE II, 5.3mm Wide  
16-Lead Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153, 4.4mm Wide  
16-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300” Wide  
M16D  
MTC16  
N16E  
Devices also available in Tape and Reel. Specify by appending the suffix letter “X” to the ordering code.  
Timing Component  
Connection Diagram  
Pin Assignment for DIP, SOIC, SOP and TSSOP  
Note: Pin 6 and Pin 14 must be hard-wired to GND.  
Top View  
© 1999 Fairchild Semiconductor Corporation  
DS005206.prf  
www.fairchildsemi.com  

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