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MM74HC221AN from NS,National Semiconductor

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MM74HC221AN

Manufacturer: NS

Dual Non-Retriggerable Monostable Multivibrator

Partnumber Manufacturer Quantity Availability
MM74HC221AN NS 21 In Stock

Description and Introduction

Dual Non-Retriggerable Monostable Multivibrator # Discover the MM74HC221AN: A High-Performance Dual Monostable Multivibrator  

The MM74HC221AN is a versatile and reliable dual monostable multivibrator from the high-speed CMOS (HC) family, designed for precision timing applications. This IC features two independent retriggerable monostable circuits, each offering adjustable pulse widths controlled by external resistors and capacitors. With its advanced HC technology, the MM74HC221AN delivers fast propagation delays, low power consumption, and robust noise immunity, making it ideal for digital systems requiring precise timing control.  

## Key Features  

- **Dual Independent Monostable Circuits**: Each multivibrator operates independently, allowing simultaneous or sequential timing functions.  
- **Retriggerable Operation**: The output pulse can be extended by retriggering, ensuring flexibility in dynamic applications.  
- **Wide Operating Voltage Range (2V to 6V)**: Compatible with both 3.3V and 5V logic systems.  
- **Adjustable Pulse Width**: Timing is determined by external RC components, enabling customization for various applications.  
- **High Noise Immunity**: Built-in Schmitt-trigger inputs enhance signal integrity in noisy environments.  
- **Low Power Consumption**: CMOS technology ensures efficient operation, reducing overall system power demands.  

## Applications  

The MM74HC221AN is widely used in digital circuits where precise timing is critical, including:  
- Pulse width modulation (PWM)  
- Frequency division and signal delay  
- Debounce circuits for switches and sensors  
- Sequential timing in automation and control systems  

Engineers and designers favor the MM74HC221AN for its reliability, ease of integration, and consistent performance across industrial, automotive, and consumer electronics applications.  

For those seeking a high-quality timing solution, the MM74HC221AN stands out as a dependable choice, combining precision, efficiency, and versatility in a compact DIP package.

Application Scenarios & Design Considerations

Dual Non-Retriggerable Monostable Multivibrator

Alternative Part Number

  • SN74HC221AN --: Same 74HC221 dual monostable multivibrator function in a DIP-16 package, direct pin-compatible replacement from the current TI portfolio.
  • CD74HC221E --: Harris/Intersil-origin 74HC221 monostable in DIP-16, electrically equivalent with compatible pinout and supply range.
  • MC74HC221ANG --: ON Semiconductor 74HC221 dual monostable multivibrator in DIP-16, same logic family and function as the original National part.

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