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SN74HCT139DR from TI,Texas Instruments

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SN74HCT139DR

Manufacturer: TI, FSC

Dual 2-Line To 4-Line Decoders/Demultiplexers

Partnumber Manufacturer Quantity Availability
SN74HCT139DR TI, FSC 1700 In Stock

Description and Introduction

Dual 2-Line To 4-Line Decoders/Demultiplexers The SN74HCT139DR is a dual 2-line to 4-line decoder/demultiplexer manufactured by Texas Instruments (TI).  

### **Specifications:**  
- **Logic Type**: Decoder/Demultiplexer  
- **Number of Circuits**: 2  
- **Number of Input Lines**: 2 (per decoder)  
- **Number of Output Lines**: 4 (per decoder)  
- **Supply Voltage Range**: 4.5V to 5.5V  
- **High-Level Input Voltage (Min)**: 2V  
- **Low-Level Input Voltage (Max)**: 0.8V  
- **Operating Temperature Range**: -40°C to +85°C  
- **Package Type**: SOIC (16-pin)  
- **Output Type**: Standard  
- **Propagation Delay Time**: 18ns (typical at 5V)  
- **Current - Output High, Low**: 4mA, 4mA  
- **Mounting Type**: Surface Mount  

### **Descriptions:**  
The SN74HCT139DR consists of two independent 2-to-4 decoders that accept two binary-weighted inputs (A0, A1) and provide four mutually exclusive active-low outputs (Y0-Y3). Each decoder has an active-low enable input (E), which, when high, disables all outputs.  

### **Features:**  
- **High-Speed CMOS Logic**  
- **Low Power Consumption**  
- **Compatible with TTL Inputs**  
- **Schmitt-Trigger Inputs for Noise Immunity**  
- **Wide Operating Voltage Range**  
- **ESD Protection Exceeds 2000V (HBM)**  

This device is commonly used in address decoding, memory selection, and data routing applications.

Application Scenarios & Design Considerations

Dual 2-Line To 4-Line Decoders/Demultiplexers

Alternative Part Number

  • CD74HCT139M --: Same HCT logic family dual 2-to-4 decoder/demultiplexer in SOIC package, directly pin-compatible with equivalent function and voltage levels.
  • MC74HCT139ADR2G --: Second-source HCT dual 2-to-4 decoder in SOIC-16, same pinout and logic function, suitable drop-in replacement.
  • 74HCT139D,653 --: Standard 74HCT dual 2-to-4 decoder in SO16 package, functionally and pin compatible alternative from a major logic supplier.
  • MC74HCT139ADG --: HCT logic dual 2-to-4 decoder in SOIC-16 with equivalent function and pinout, suitable direct replacement.

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