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SN74LS257BMEL

Manufacturer: TI, MOT

Quad 2-Input Multiplexer with 3-State Outputs

Partnumber Manufacturer Quantity Availability
SN74LS257BMEL TI, MOT 5201 In Stock

Description and Introduction

Quad 2-Input Multiplexer with 3-State Outputs The SN74LS257BMEL is a quad 2-line to 1-line data selector/multiplexer with 3-state outputs, manufactured by Texas Instruments.  

### **Specifications:**  
- **Logic Type:** Data Selector/Multiplexer  
- **Number of Circuits:** 4  
- **Number of Input Lines:** 2  
- **Number of Output Lines:** 1 (per circuit)  
- **Output Type:** 3-State  
- **Supply Voltage (VCC):** 4.75V to 5.25V  
- **Operating Temperature Range:** -55°C to +125°C  
- **Package / Case:** SOIC-16  
- **Mounting Type:** Surface Mount  
- **Propagation Delay Time:** 15ns (typical)  
- **High-Level Output Current:** -2.6mA  
- **Low-Level Output Current:** 24mA  

### **Descriptions:**  
The SN74LS257BMEL is a high-speed TTL logic device that selects one of two data sources and routes it to a common output. It features 3-state outputs, allowing multiple devices to share a common bus without interference.  

### **Features:**  
- **Quad 2-to-1 Multiplexer:** Four independent selectors in one package.  
- **3-State Outputs:** Enable/disable functionality for bus-oriented applications.  
- **Low Power Consumption:** Typical power dissipation of 32mW.  
- **TTL-Compatible Inputs:** Works with standard TTL logic levels.  
- **Wide Operating Temperature Range:** Suitable for industrial and military applications.  
- **High-Speed Operation:** Fast propagation delay for efficient data routing.  

This information is based solely on the manufacturer's datasheet and technical documentation.

Application Scenarios & Design Considerations

Quad 2-Input Multiplexer with 3-State Outputs

Alternative Part Number

  • DM74LS257BN --: Same LS257 quad 2-to-1 multiplexer function with 3-state outputs, widely available and pin-compatible in DIP/SOIC packages.
  • 74LS257APC --: Direct functional equivalent of the LS257 multiplexer from the same logic family, suitable drop-in replacement for most designs.
  • MC74LS257AN --: Another LS257 quad 2-to-1 data selector/multiplexer with 3-state outputs, electrically compatible and commonly stocked.
  • SN74LS257BD --: Equivalent LS257 multiplexer in SOIC package, suitable when board layout allows surface-mount instead of the original SOIC-wide variant.
  • 74LS257AP --: Direct functional equivalent quad 2-line to 1-line data selector/multiplexer, different naming, good availability and similar electrical characteristics.

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