Overview
The SN74LS139ADR is a dual 2-line to 4-line decoder/demultiplexer integrated circuit produced by Texas Instruments. This component is part of the 74LS series and is designed for high-performance applications, particularly in memory decoding and data transmission systems. It features two fully independent 2-to-4 line decoders/demultiplexers in a single 16-pin SOIC package, making it highly versatile for various digital circuit designs.
Key Specifications
| Parameter | Value |
|---|---|
| Package Type | 16-SOIC (0.154", 3.90mm Width) |
| Pins | 16 |
| Operating Temperature Range | 0°C to 70°C |
| Voltage Supply Source | Single Supply |
| Voltage - Supply | 4.75 V ~ 5.25 V |
| Current - Output High, Low | 400µA, 8mA |
| Mounting Type | Surface Mount |
| Circuit | 1 x 2:4 |
| Independent Circuits | 2 |
Key Features
- Designed specifically for high-speed applications such as memory decoders and data transmission systems.
- Schottky clamped for high performance to suppress line-ringing and simplify system design.
- Two fully independent 2-to-4 line decoders/demultiplexers in a single package.
- Active-low enable input can be used as a data line in demultiplexing applications.
- Fully buffered inputs, each representing only one normalized load to its driving circuit.
Applications
The SN74LS139ADR is suitable for a variety of high-performance digital applications, including:
- Memory decoding systems to minimize system decoding delays.
- Data routing and transmission systems requiring short propagation delay times.
- High-speed memory systems utilizing fast-enable circuits.
- General-purpose decoding and demultiplexing in digital circuits.
Q & A
- What is the SN74LS139ADR used for? The SN74LS139ADR is used as a dual 2-line to 4-line decoder/demultiplexer in high-performance digital applications such as memory decoding and data transmission systems.
- What package types are available for the SN74LS139ADR? The SN74LS139ADR is available in a 16-pin SOIC package among other options like PDIP and SOP.
- What is the operating temperature range of the SN74LS139ADR? The operating temperature range is from 0°C to 70°C.
- What is the voltage supply range for the SN74LS139ADR? The voltage supply range is from 4.75 V to 5.25 V.
- How many independent decoders/demultiplexers are in the SN74LS139ADR? There are two fully independent 2-to-4 line decoders/demultiplexers.
- What is the purpose of the Schottky clamping in the SN74LS139ADR? The Schottky clamping is used to suppress line-ringing and simplify system design.
- Can the SN74LS139ADR be used in surface mount applications? Yes, the SN74LS139ADR is suitable for surface mount applications.
- What are the typical output currents for the SN74LS139ADR? The typical output currents are 400µA for high and 8mA for low.
- Is the SN74LS139ADR RoHS compliant? Yes, the SN74LS139ADR is RoHS compliant.
- Where can I find detailed specifications and datasheets for the SN74LS139ADR? Detailed specifications and datasheets can be found on the Texas Instruments website and other electronic component distributors like Heisener and LCSC.
