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SN74AS138 from TI,Texas Instruments

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SN74AS138

Manufacturer: TI

3-Line To 8-Line Decoders/Demultiplexers

Partnumber Manufacturer Quantity Availability
SN74AS138 TI 47 In Stock

Description and Introduction

3-Line To 8-Line Decoders/Demultiplexers The SN74AS138 is a 3-line to 8-line decoder/demultiplexer manufactured by Texas Instruments (TI).  

### **Specifications:**  
- **Logic Type**: Decoder/Demultiplexer  
- **Number of Input Lines**: 3  
- **Number of Output Lines**: 8 (active-low)  
- **Supply Voltage Range**: 4.5V to 5.5V  
- **Operating Temperature Range**: 0°C to 70°C  
- **Propagation Delay**: Typically 9ns (max 15ns) at 5V  
- **Power Dissipation**: 150mW (typical)  
- **Package Options**: PDIP, SOIC, TSSOP  

### **Descriptions:**  
The SN74AS138 decodes three binary address inputs (A0, A1, A2) into one of eight mutually exclusive outputs (Y0-Y7). It features three enable inputs (G1, G2A, G2B) that must be in the correct state (G1 high, G2A and G2B low) for the device to operate.  

### **Features:**  
- **High-Speed Operation**: Optimized for AS (Advanced Schottky) performance.  
- **Active-Low Outputs**: Outputs are low when selected.  
- **Multiple Enable Inputs**: Allows for easy expansion to larger decoders.  
- **Low Power Consumption**: Designed for efficient power usage.  
- **Wide Operating Voltage**: Compatible with standard 5V TTL systems.  

This device is commonly used in memory addressing, data routing, and logic function generation.

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