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SN74LS155ADR from TEXAS

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SN74LS155ADR

Manufacturer: TEXAS, TI, TI

Dual 2-Line To 4-Line Decoders/Demultiplexers

Partnumber Manufacturer Quantity Availability
SN74LS155ADR TEXAS, TI, TI 8100 In Stock

Description and Introduction

Dual 2-Line To 4-Line Decoders/Demultiplexers The SN74LS155ADR is a dual 2-line to 4-line decoder/demultiplexer manufactured by Texas Instruments (TI).  

### **Specifications:**  
- **Logic Family:** LS (Low-Power Schottky)  
- **Function:** Dual 2-to-4 Line Decoder/Demultiplexer  
- **Supply Voltage (VCC):** 4.75V to 5.25V (nominal 5V)  
- **Operating Temperature Range:** 0°C to 70°C  
- **Package Type:** SOIC-16  
- **Output Type:** Active-Low  
- **Propagation Delay:** Typically 15ns  
- **Power Dissipation:** Low power consumption  

### **Descriptions:**  
The SN74LS155ADR consists of two independent 2-to-4 decoders with common 2-bit binary address inputs and separate enable inputs. Each decoder provides four mutually exclusive active-low outputs. It can also function as a demultiplexer when the enable input is used as a data input.  

### **Features:**  
- **Dual Decoder/Demultiplexer:** Two independent 2-to-4 decoders in a single package.  
- **Active-Low Outputs:** Outputs are low when selected.  
- **Common Address Inputs:** Shared address lines for both decoders.  
- **Separate Enable Inputs:** Individual enable controls for each decoder.  
- **Schottky Technology:** Provides high speed while maintaining low power consumption.  
- **Wide Operating Voltage:** Designed for 5V TTL systems.  
- **Standard SOIC-16 Package:** Suitable for surface-mount applications.  

This device is commonly used in digital systems for address decoding, memory selection, and data routing applications.

Application Scenarios & Design Considerations

Dual 2-Line To 4-Line Decoders/Demultiplexers

Alternative Part Number

  • DM74LS155AN --: Same 74LS155 dual 2-to-4 line decoder/demultiplexer function in a DIP package from a different series prefix, electrically compatible.
  • MC74LS155AD --: Equivalent 74LS155 decoder/demultiplexer with matching logic function and pinout, different manufacturer series naming.
  • SN74LS156DR --: Same decoder/demultiplexer family with open-collector outputs; functionally similar and often used as a substitute when output drive differs acceptably.
  • SN74LS156N --: Same LS logic family decoder/demultiplexer with open-collector outputs, suitable when output drive requirements match and a DIP package is acceptable.
  • CD74HCT155E --: HCT-family equivalent dual 2-to-4 decoder with TTL-compatible inputs, offering a lower-power CMOS alternative for the same logic function.
  • MC74LS155AN --: Direct functional equivalent dual 2-to-4 decoder/demultiplexer in LS TTL family with a distinct MC prefix, suitable as a drop-in logic replacement.

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