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SNJ54LS21W from TI,Texas Instruments

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SNJ54LS21W

Manufacturer: TI

Dual 4-Input Positive-AND Gates
Partnumber Manufacturer Quantity Availability
SNJ54LS21W TI 58 In Stock

Description and Introduction

Dual 4-Input Positive-AND Gates The SNJ54LS21W is a dual 4-input positive-AND gate manufactured by Texas Instruments (TI).  

### **Specifications:**  
- **Logic Type:** AND Gate  
- **Number of Circuits:** 2  
- **Number of Inputs per Gate:** 4  
- **Supply Voltage (VCC):** 4.5V to 5.5V  
- **Operating Temperature Range:** -55°C to +125°C (Military Grade)  
- **Package Type:** Ceramic Flatpack (W)  
- **Propagation Delay:** Typically 15ns at 5V  
- **Output Current (High/Low):** -0.4mA / 8mA  

### **Descriptions and Features:**  
- High-speed, low-power Schottky (LS) technology  
- Dual 4-input AND gate in a single package  
- Fully compatible with TTL logic levels  
- Designed for military and aerospace applications  
- Ceramic flatpack packaging for high-reliability environments  

This device is part of TI’s 54LS series, which is qualified for extended temperature and harsh conditions.

Application Scenarios & Design Considerations

Dual 4-Input Positive-AND Gates

Alternative Part Number

  • 74LS21PC --: Same dual 4-input AND gate function in a standard 74LS series DIP package, widely available and pin-compatible in function.
  • DM74LS21N --: Direct functional equivalent dual 4-input AND gate from another major logic vendor, suitable as a drop-in replacement in most designs.
  • MC74LS21N --: Equivalent 74LS21 dual 4-input AND gate from a different manufacturer series, usable as an alternative when TI parts are unavailable.

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