Monostable Multivibrators

Monostable multivibrators, or one-shot multivibrators, feature a stable and unstable state and are digital logic integrated circuits that are used as timers and are designed to produce a single (high or low) output pulse. Their unstable state resulting from the trigger impulse is a transient state, and the circuit returns to its stable state immediately after elapsing the fixed time. 

These ICs are also referred to as ½ stable type multivibrators because they feature two transistors added with a resistor network and one resistor-capacitor that determine the time length before returning the triggered circuit to its stable state.

Why Use a Monostable Multivibrator?

This device requires a single pulse for its operation, eliminating the need for multiple pulses. Furthermore, they are cost-effective, easily constructed, and feature simple designs. 

Monostable Multivibrator Types

These multivibrators are classified into two types and include:  

• Re-triggerable Monostable Multivibrators: These multivibrators are re-triggerable with repeated triggering pulses and remain in an unstable state. 
• Non-re-triggerable Monostable Multivibrators: These devices remain intact in an unstable state for a specified time period.

Monostable Multivibrators Packaging Options

These multivibrators are available in a wide range of pin numbers and IC package types, such as:

Types of Basic IC Package 

• Ball Grid Array 
• Dual In-Line Package 
• Quad Flat Package 
• Single In-Line Package 

Variants of QFP Packaging 

• Low-Profile Quad Flat Package 
• Thin Quad Flat Package

Variants of BGA Packaging 

• Plastic-Ball Grid Array 
• Tape-Ball Grid Array 

What are Monostable Multivibrators Used for?

• These devices are ideal for generating specialized circuit timed delay.
• They are also suitable for temporary memories and pulse detection in electronic devices used as a timer.