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SN74122N from TI,Texas Instruments

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SN74122N

Manufacturer: TI

RETRIGGERABLE MONOSTABLE MULTIVIBRATORS

Partnumber Manufacturer Quantity Availability
SN74122N TI 83 In Stock

Description and Introduction

RETRIGGERABLE MONOSTABLE MULTIVIBRATORS The SN74122N is a retriggerable monostable multivibrator manufactured by Texas Instruments (TI).  

### **Specifications:**  
- **Supply Voltage (VCC):** 4.75V to 5.25V (standard 5V operation)  
- **Power Dissipation:** 500mW (max)  
- **Operating Temperature Range:** 0°C to 70°C  
- **Propagation Delay:** Typically 45ns  
- **Output Current (High/Low):** -0.4mA / 16mA  
- **Trigger Inputs:** Two active-low (A1, A2) and two active-high (B1, B2)  
- **Retriggerable:** Yes (can be extended by additional pulses)  
- **Timing Adjustable:** Via external resistor (Rext) and capacitor (Cext)  

### **Descriptions:**  
The SN74122N is a monostable multivibrator that generates a single output pulse when triggered. It is retriggerable, meaning the pulse width can be extended by applying additional trigger pulses before the initial pulse ends. The output pulse duration is determined by an external resistor and capacitor.  

### **Features:**  
- Retriggerable for extended pulse width  
- Clear input for immediate termination of output pulse  
- Two types of trigger inputs (active-low and active-high)  
- Adjustable pulse width via external components  
- Compatible with TTL logic levels  
- Available in 16-pin DIP (Dual In-line Package)  

This information is sourced from Texas Instruments' official documentation.

Application Scenarios & Design Considerations

RETRIGGERABLE MONOSTABLE MULTIVIBRATORS

Alternative Part Number

  • MC74122P --: Direct functional equivalent of the 74122 retriggerable monostable multivibrator in a DIP package, widely available from a different manufacturer.
  • DM74122N --: Pin-compatible 74122 monostable multivibrator in DIP-14, same logic function and TTL levels with a different series prefix.
  • 74LS122N --: Low-power Schottky version of the 74122 with identical pinout and function, offering lower power consumption as a drop-in replacement.
  • CD74HC122E --: High-speed CMOS retriggerable monostable multivibrator with the same 122 function and DIP-14 pinout, offering wider supply range and lower power.
  • MC14538BCP --: Dual precision retriggerable monostable multivibrator that can replace the 122 function in DIP-14, widely available and functionally similar.

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