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SN74HCT138NSR from TI/PBF,Texas Instruments

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SN74HCT138NSR

Manufacturer: TI/PBF, TI

3-Line To 8-Line Decoders/Demultiplexers

Partnumber Manufacturer Quantity Availability
SN74HCT138NSR TI/PBF, TI 5850 In Stock

Description and Introduction

3-Line To 8-Line Decoders/Demultiplexers The SN74HCT138NSR is a 3-to-8 line decoder/demultiplexer manufactured by Texas Instruments (TI).  

### **Specifications:**  
- **Technology Family:** HCT  
- **Supply Voltage Range:** 4.5V to 5.5V  
- **Operating Temperature Range:** -40°C to 85°C  
- **Package:** SOIC (16-pin)  
- **Logic Type:** Decoder/Demultiplexer  
- **Number of Input Lines:** 3  
- **Number of Output Lines:** 8  
- **Output Current:** ±6 mA  
- **Propagation Delay:** 19 ns (typical)  
- **Input Capacitance:** 3 pF  
- **Low Power Consumption:** 80 µA (max)  

### **Descriptions:**  
The SN74HCT138NSR decodes three binary address inputs (A0, A1, A2) into one of eight mutually exclusive outputs (Y0-Y7). It features three enable inputs (two active-low and one active-high) for cascading and control.  

### **Features:**  
- **3-to-8 Line Decoding:** Converts 3-bit input to 8 output lines.  
- **Demultiplexing Capability:** Can function as a 1-to-8 demultiplexer.  
- **Active-Low Outputs:** Outputs are low when selected.  
- **Multiple Enable Inputs:** Two active-low (G1, G2A, G2B) and one active-high (G1) for flexible control.  
- **High Noise Immunity:** Typical CMOS noise immunity.  
- **Balanced Propagation Delays:** Ensures consistent timing.  
- **Wide Operating Voltage:** Supports 4.5V to 5.5V operation.  
- **Pb-Free (PBF) Package:** Compliant with RoHS standards.  

This information is strictly based on the manufacturer's datasheet.

Application Scenarios & Design Considerations

3-Line To 8-Line Decoders/Demultiplexers

Alternative Part Number

  • CD74HCT138M --: Same 3-to-8 line decoder/demultiplexer function in HCT logic family, SOIC package, direct functional equivalent with different series prefix.
  • MC74HCT138ADR2G --: Pin-compatible 3-to-8 decoder/demultiplexer in HCT family, SOIC package, widely available second source.
  • 74HCT138D --: Standard 3-to-8 line decoder in HCT logic, SOIC-16 package, functionally equivalent alternate source.
  • MC74HCT138ADG --: HCT-family 3-to-8 decoder with matching truth table and pinout, SOIC package, widely available second-source alternative.

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