54121 - Monostable Multivibrator

Product Overview

National Semiconductor

Datasheet Details

Part number	54121
Manufacturer	National Semiconductor
File Size	128.44 KB
Description	Monostable Multivibrator
Datasheet	54121 Datasheet
Additional preview pages of the 54121 datasheet.

Product details

Description

The DM54 74121 is a monostable multivibrator featuring both positive and negative edge triggering with complementary outputs An internal 2kX timing resistor is provided for design convenience minimizing component count and layout problems This device can be used with a single external capacitor Inputs (A) are active-low trigger transition inputs and input (B) is an active-high transition Schmitt-trigger input that allows jitter-free triggering from inputs with transition rates as slow as 1 volt

Features

Y Y Triggered from active-high transition or active-low transition inputs Variable pulse width from 30 ns to 28 seconds Connection Diagram Dual-In-Line Package Function Table Inputs A1 L X X H H A2 X L X H B H H L X H H H Q L L L L Outputs Q H H H H v H v v L X H L X TL F 6538.
1 v X L u u e High Logic Level e Low Logic Level e Can Be Either Low or High e Positive Going Transition e Negative Going Transition e A Positive Pulse e A Negative Pulse u v Order Number 54121DMQB 5412.

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Published: Apr 1, 2005 |