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SN54F138J from TI,Texas Instruments

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SN54F138J

Manufacturer: TI

3-Line To 8-Line Decoders/Demultiplexers

Partnumber Manufacturer Quantity Availability
SN54F138J TI 600 In Stock

Description and Introduction

3-Line To 8-Line Decoders/Demultiplexers The SN54F138J is a 3-to-8 line decoder/demultiplexer manufactured by Texas Instruments (TI).  

### **Specifications:**  
- **Logic Type:** Decoder/Demultiplexer  
- **Number of Input Lines:** 3 (A0, A1, A2)  
- **Number of Output Lines:** 8 (active-low outputs: Y0-Y7)  
- **Supply Voltage Range (VCC):** 4.5V to 5.5V  
- **Operating Temperature Range:** -55°C to +125°C (military-grade)  
- **Package Type:** Ceramic DIP (Dual In-line Package)  
- **Technology:** TTL (Transistor-Transistor Logic)  
- **Propagation Delay:** Typically 11 ns  
- **Current Consumption (ICC):** 12 mA (max)  

### **Descriptions:**  
The SN54F138J decodes a 3-bit binary input into one of eight mutually exclusive active-low outputs. It also features three enable inputs (two active-low and one active-high) to control operation.  

### **Features:**  
- **3-to-8 Line Decoding:** Converts 3-bit binary input into one of eight outputs.  
- **Demultiplexing Capability:** Can function as a demultiplexer with the enable inputs.  
- **Active-Low Outputs:** Outputs are low when selected.  
- **Enable Inputs:** G1 (active-high), G2A and G2B (active-low) for chip control.  
- **High-Speed Operation:** Optimized for fast switching applications.  
- **Military Temperature Range:** Suitable for harsh environments.  

This device is part of TI’s SN54F series, designed for reliability in demanding applications.

Application Scenarios & Design Considerations

3-Line To 8-Line Decoders/Demultiplexers

Alternative Part Number

  • 74F138PC --: Same 3-to-8 line decoder/demultiplexer function in the F logic family, commercial temperature range, DIP package; pin-compatible with the SN54F138J for benchtop use.
  • MC74F138N --: Direct functional equivalent 3-to-8 decoder in F TTL family with identical pinout in a 16-pin DIP, widely available as a second-source replacement.
  • CD74FCT138E --: FCT-family 3-to-8 decoder with similar speed and pinout in DIP; usable substitute when F-family parts are unavailable, though input thresholds differ slightly.

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