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SNJ54LS47J from TI,Texas Instruments

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SNJ54LS47J

Manufacturer: TI, TM

BCD-to-Seven-Segment Decoders/Drivers

Partnumber Manufacturer Quantity Availability
SNJ54LS47J TI, TM 78 In Stock

Description and Introduction

BCD-to-Seven-Segment Decoders/Drivers The SNJ54LS47J is a BCD-to-Seven-Segment Decoder/Driver manufactured by Texas Instruments (TI). Below are its specifications, descriptions, and features based on available factual information:

### **Specifications:**  
- **Manufacturer:** Texas Instruments (TI)  
- **Series:** 54LS  
- **Logic Type:** BCD-to-Seven-Segment Decoder/Driver  
- **Technology:** Low-Power Schottky (LS)  
- **Operating Voltage:** 4.5V to 5.5V  
- **Output Type:** Open-Collector  
- **Number of Inputs:** 4 (BCD)  
- **Number of Outputs:** 7 (Seven-Segment)  
- **Propagation Delay:** Typically 27ns  
- **Operating Temperature Range:** -55°C to +125°C (Military Grade)  
- **Package Type:** Ceramic DIP (Dual In-Line Package)  
- **Pin Count:** 16  

### **Descriptions:**  
The SNJ54LS47J is designed to convert Binary-Coded Decimal (BCD) input into active-low outputs suitable for driving common-anode seven-segment LED displays. It includes internal pull-down resistors and lamp test functionality.  

### **Features:**  
- **BCD-to-Seven-Segment Decoding:** Converts 4-bit BCD input to seven-segment outputs.  
- **Open-Collector Outputs:** Allows direct drive of common-anode displays.  
- **Lamp Test Input:** Enables testing of all segments.  
- **Ripple Blanking Input/Output:** Supports blanking for leading/trailing zeros.  
- **High Noise Immunity:** Typical of LS technology.  
- **Wide Operating Temperature Range:** Suitable for military applications.  

This information is based on TI's official documentation for the SNJ54LS47J.

Application Scenarios & Design Considerations

BCD-to-Seven-Segment Decoders/Drivers

Alternative Part Number

  • DM74LS47N --: Same BCD-to-seven-segment decoder function in the LS family, widely available and pin-compatible in DIP package.
  • MC74LS47N --: Direct functional equivalent of the 54LS47 decoder with open-collector outputs, commonly used as a drop-in replacement.
  • CD74HC47E --: CMOS BCD-to-seven-segment decoder with similar logic function, suitable when lower power consumption is acceptable.
  • SN74LS47N --: Commercial-grade version of the same LS47 decoder function, electrically equivalent for most non-military applications.

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