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MM54C221 Datasheet

Part Number MM54C221
Manufacturers National
Logo National
Description Dual Monostable Multivibrator
Datasheet MM54C221 DatasheetMM54C221 Datasheet (PDF)

MM54C221 MM74C221 Dual Monostable Multivibrator February 1988 MM54C221 MM74C221 Dual Monostable Multivibrator General Description The MM54C221 MM74C221 dual monostable multivibrator is a monolithic complementary MOS integrated circuit Each multivibrator features a negative-transition-triggered input and a positive-transition-triggered input either of which can be used as an inhibit input and a clear input Once fired the output pulses are independent of further transitions of the A and B inputs.

  MM54C221   MM54C221






Dual Monostable Multivibrator

MM54C221 MM74C221 Dual Monostable Multivibrator February 1988 MM54C221 MM74C221 Dual Monostable Multivibrator General Description The MM54C221 MM74C221 dual monostable multivibrator is a monolithic complementary MOS integrated circuit Each multivibrator features a negative-transition-triggered input and a positive-transition-triggered input either of which can be used as an inhibit input and a clear input Once fired the output pulses are independent of further transitions of the A and B inputs and are a function of the external timing components CEXT and REXT The pulse width is stable over a wide range of temperature and VCC Pulse stability will be limited by the accuracy of external timing components The pulse width is approximately defined by the relationship tW(OUT) CEXT REXT For further information and applications see AN-138 Features Y Y Y Y Wide supply voltage range Guaranteed noise margin High noise immunity Low power TTL compatibility 4 5V to 15V 1 0V 0 45 VCC (typ ) fan out of 2 driving 74L Connection Diagrams Timing Component Dual-In-Line Package TL F 5904 – 1 TL F 5904 – 2 Top View Order Number MM54C221 or MM74C221 Truth Table Inputs Clear L X X H H A X H X L B X X L Q L L L Outputs Q H H H H L e e e e e e e u v X u H High level Low level Transition from low to high Transition from high to low One high level pulse One low level pulse Irrelevant v C1995 National Semiconductor Corporation TL F 5904 RRD-B30M105 Printed in U S A Absolute Maximum Ratin.


2005-05-09 : MM54C221    MM54C240    MM54C244    MM54C42    MM54C74    MM54C85    MM54C86    MM54C89    MM54C90    MM54C901   


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