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SN74LS122DR2

Manufacturer: MOT

Retriggerable Monostable Multivibrators

Partnumber Manufacturer Quantity Availability
SN74LS122DR2 MOT 49815 In Stock

Description and Introduction

Retriggerable Monostable Multivibrators The SN74LS122DR2 is a monostable multivibrator (one-shot) integrated circuit manufactured by Texas Instruments.  

### **Specifications:**  
- **Logic Family:** LS (Low-Power Schottky)  
- **Function:** Retriggerable Monostable Multivibrator  
- **Number of Circuits:** 1  
- **Output Type:** Standard  
- **Propagation Delay Time:** Typically 35 ns  
- **Supply Voltage Range:** 4.75V to 5.25V  
- **Operating Temperature Range:** 0°C to 70°C  
- **Package:** SOIC-16  
- **Trigger Type:** Positive or Negative Edge  
- **Pulse Width Adjustable:** Yes (via external resistor and capacitor)  

### **Descriptions:**  
The SN74LS122DR2 is a retriggerable monostable multivibrator designed to generate precise output pulses of a duration determined by external timing components (resistor and capacitor). It can be triggered by either a positive or negative edge input and remains stable in the absence of a trigger signal.  

### **Features:**  
- Retriggerable for extended pulse width  
- Clear input for immediate termination of output pulse  
- Wide range of output pulse widths (adjustable via external RC components)  
- Compatible with TTL logic levels  
- Low power consumption typical of LS family  
- Available in surface-mount SOIC-16 package  

For exact timing calculations, refer to the datasheet for external component selection guidelines.

Application Scenarios & Design Considerations

Retriggerable Monostable Multivibrators

Alternative Part Number

  • CD74HC123E --: Monostable multivibrator in the same function class; CMOS version offers lower power and is a common drop-in for LS122 retriggerable one-shot applications.
  • MC14538BCP --: Dual precision retriggerable monostable multivibrator, functionally equivalent to the LS122 one-shot with similar timing capabilities.
  • 74HC221 --: Dual retriggerable monostable multivibrator with clear/reset, widely available and suitable as a functional replacement for the LS122 timing circuit.
  • 74LS122 --: Same 74LS122 retriggerable monostable multivibrator function with identical logic family and pinout; TI is the primary source for 74LS series and offers broad availability.
  • MC74LS122N --: Direct functional equivalent monostable multivibrator in the 74LS family from a major second source, suitable as a drop-in replacement for the logic function.
  • SN74LS123N --: Dual retriggerable monostable multivibrator in the same 74LS family; electrically similar and usable when one half of the dual device replaces the single unit, with pinout review required.

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