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SN54LS148J from TI,Texas Instruments

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SN54LS148J

Manufacturer: TI

10-LINE-TO-4-LINE AND 8-LINE-TO-3-LINE PRIORITY ENCODERS

Partnumber Manufacturer Quantity Availability
SN54LS148J TI 300 In Stock

Description and Introduction

10-LINE-TO-4-LINE AND 8-LINE-TO-3-LINE PRIORITY ENCODERS The SN54LS148J is a 8-line to 3-line priority encoder manufactured by Texas Instruments (TI).  

### **Specifications:**  
- **Logic Type**: Priority Encoder  
- **Number of Inputs**: 8 (active LOW)  
- **Number of Outputs**: 3 (binary coded, active LOW)  
- **Supply Voltage**: 4.5V to 5.5V  
- **Operating Temperature Range**: -55°C to +125°C (Military Grade)  
- **Package**: 16-pin CDIP (Ceramic Dual In-line Package)  
- **Technology**: LS (Low-Power Schottky)  
- **Propagation Delay**: Typically 30ns  
- **Current Consumption**: Low power consumption (LS family)  

### **Descriptions and Features:**  
- **Priority Encoding**: Highest priority input (I7) is encoded first if multiple inputs are active.  
- **Active-Low Inputs/Outputs**: Inputs and outputs are active LOW (logic '0' indicates an active state).  
- **Enable Input (EI)**: Allows cascading multiple encoders.  
- **Group Select (GS)**: Indicates when any input is active.  
- **Enable Output (EO)**: Used for expansion to larger encoders (remains HIGH when no inputs are active).  
- **Military-Grade Reliability**: Designed for harsh environments.  

This encoder is commonly used in digital systems for interrupt handling, keyboard encoding, and address decoding.

Application Scenarios & Design Considerations

10-LINE-TO-4-LINE AND 8-LINE-TO-3-LINE PRIORITY ENCODERS

Alternative Part Number

  • DM54LS148J --: Direct pin-compatible 8-to-3 priority encoder in the same 54LS logic family and ceramic DIP package, functionally equivalent to the SN54LS148J.
  • MC54LS148L --: Second-source 54LS148 priority encoder with identical function and pinout, suitable as a drop-in replacement in military-temperature applications.
  • CD74HCT148E --: CMOS HCT-family 8-to-3 priority encoder with the same logic function and pinout; usable where HCT input thresholds and commercial temperature range are acceptable.

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