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MM74HC123AJ from NSC,National Semiconductor

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MM74HC123AJ

Manufacturer: NSC, NS

Dual Retriggerable Monostable Multivibrator

Partnumber Manufacturer Quantity Availability
MM74HC123AJ NSC, NS 37 In Stock

Description and Introduction

Dual Retriggerable Monostable Multivibrator **Precision Timing with the MM74HC123AJ Dual Retriggerable Monostable Multivibrator**  

In modern electronics, precise timing control is essential for applications ranging from pulse generation to signal delay. The **MM74HC123AJ** is a high-performance, dual retriggerable monostable multivibrator designed to meet these demands with reliability and efficiency.  

Built using advanced high-speed CMOS technology, the MM74HC123AJ offers low power consumption while maintaining robust noise immunity. Each of its two independent multivibrators can be triggered by either a positive or negative edge, providing flexibility in circuit design. The device features retriggerable functionality, allowing pulse extension during active operation—ideal for applications requiring adjustable timing intervals.  

Key specifications include a wide operating voltage range (2V to 6V), making it compatible with both 3.3V and 5V systems. The output pulse width is determined by external timing components (resistor and capacitor), enabling precise customization for diverse timing requirements. Additionally, the MM74HC123AJ includes a direct clear input for immediate pulse termination, enhancing control in time-critical applications.  

Common uses include:  
- **Pulse shaping and stretching** in digital systems  
- **Debounce circuits** for mechanical switches  
- **Timing generators** in embedded designs  
- **Sequential logic synchronization**  

Engineers favor the MM74HC123AJ for its consistent performance, compact SOIC package, and industry-standard pinout, ensuring easy integration into existing designs. Whether for prototyping or production, this component delivers accuracy and versatility in timing solutions.  

For applications demanding dependable pulse control, the MM74HC123AJ stands as a proven choice, combining precision with the efficiency of modern CMOS technology.

Application Scenarios & Design Considerations

Dual Retriggerable Monostable Multivibrator

Alternative Part Number

  • SN74HC123AN --: Same 74HC123 dual retriggerable monostable multivibrator function in a DIP-16 package, direct pin-compatible replacement from the current TI portfolio.
  • CD74HC123E --: Harris/Intersil-lineage 74HC123 monostable in DIP-16, electrically equivalent with the same trigger and reset inputs.
  • MC74HC123ANG --: Motorola-lineage 74HC123 dual monostable in a 16-pin DIP, pin-compatible and widely available as a second source.
  • SN74HC123N --: Pin-compatible 74HC123 monostable multivibrator in PDIP, widely available and electrically equivalent to the original NS part.
  • 74HC123N --: Standard 74HC123 dual monostable in DIP package from a major logic supplier, suitable drop-in replacement for the original device.

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