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SN74LS21NSR from TI,Texas Instruments

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SN74LS21NSR

Manufacturer: TI, TEXAS

Dual 4-input positive-AND gates

Partnumber Manufacturer Quantity Availability
SN74LS21NSR TI, TEXAS 1429 In Stock

Description and Introduction

Dual 4-input positive-AND gates The SN74LS21NSR is a dual 4-input positive-AND gate manufactured by Texas Instruments. Below are its specifications, descriptions, and features:

### **Specifications:**
- **Logic Type:** AND Gate  
- **Number of Circuits:** 2  
- **Number of Inputs:** 4 per gate  
- **Supply Voltage (VCC):** 4.75V to 5.25V  
- **Operating Temperature Range:** 0°C to +70°C  
- **Package / Case:** SOIC-14  
- **Mounting Type:** Surface Mount  
- **Propagation Delay Time:** 15ns (typical)  
- **Output Current:** 8mA (High), 16mA (Low)  
- **Power Dissipation:** 20mW per gate (typical)  

### **Descriptions:**
- The SN74LS21NSR is a dual 4-input AND gate IC that performs logical AND operations.  
- It is part of Texas Instruments' LS (Low-Power Schottky) family, offering a balance of speed and power efficiency.  
- Designed for use in digital logic applications, including computing, industrial control, and signal processing.  

### **Features:**
- **Low Power Consumption:** Optimized for reduced power usage.  
- **High Noise Immunity:** Improved resistance to electrical noise.  
- **Schottky Clamped:** Ensures fast switching speeds.  
- **Wide Operating Voltage Range:** Supports standard TTL levels.  
- **Surface-Mount Package (SOIC-14):** Suitable for compact PCB designs.  

For detailed electrical characteristics and application notes, refer to the official Texas Instruments datasheet.

Application Scenarios & Design Considerations

Dual 4-input positive-AND gates

Alternative Part Number

  • DM74LS21N --: Same dual 4-input AND gate function in LS TTL logic, widely available and pin-compatible in DIP package.
  • 74LS21PC --: Equivalent 74LS21 dual 4-input AND gate from a different series prefix, suitable direct functional replacement.
  • MC74LS21DR2G --: SOIC-packaged dual 4-input AND gate with matching LS TTL characteristics, good surface-mount alternative.

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