SN74LS139ANSR

Product Overview

Category

SN74LS139ANSR belongs to the category of integrated circuits (ICs).

Use

This product is commonly used in digital electronics for decoding applications.

Characteristics

• Low-power Schottky (LS) technology
• Dual 2-line to 4-line decoder/demultiplexer
• High-speed operation
• Wide operating voltage range: 2V to 6V
• Low power consumption
• TTL compatible inputs

Package

SN74LS139ANSR is available in a small-outline package (SOIC) with 16 pins.

Essence

The essence of SN74LS139ANSR lies in its ability to decode two binary inputs into four mutually exclusive outputs.

Packaging/Quantity

SN74LS139ANSR is typically packaged in reels and comes in quantities of 2500 units per reel.

Specifications

• Supply Voltage Range: 2V to 6V
• Input Voltage Range: 0V to VCC
• Output Voltage Range: 0V to VCC
• Operating Temperature Range: -40°C to +85°C
• Propagation Delay Time: 15ns (max)
• Power Dissipation: 22mW (typ)

Detailed Pin Configuration

1. GND (Ground)
2. A1 (Input A1)
3. A0 (Input A0)
4. E (Enable Input)
5. Y0 (Output Y0)
6. Y1 (Output Y1)
7. Y2 (Output Y2)
8. Y3 (Output Y3)
9. VCC (Supply Voltage)

Functional Features

SN74LS139ANSR is a dual 2-line to 4-line decoder/demultiplexer. It takes two binary inputs, A1 and A0, and an enable input, E. Based on the combination of these inputs, it generates four mutually exclusive outputs, Y0 to Y3. The enable input allows the user to control the decoding operation.

Advantages and Disadvantages

Advantages

• High-speed operation enables efficient decoding in digital circuits.
• Wide operating voltage range makes it compatible with various power supply levels.
• Low power consumption helps in reducing overall energy consumption.
• TTL compatible inputs ensure compatibility with other TTL logic devices.

Disadvantages

• Limited number of inputs and outputs restricts its application in complex decoding scenarios.
• Propagation delay time may affect timing-sensitive applications.

Working Principles

SN74LS139ANSR works based on the principle of combinational logic. It uses a combination of AND and NOT gates to decode the binary inputs into mutually exclusive outputs. The enable input controls the decoding operation, allowing the user to activate or deactivate the decoder as needed.

Detailed Application Field Plans

SN74LS139ANSR finds applications in various fields, including: 1. Address decoding in microprocessors and memory systems. 2. Data routing and selection in multiplexers and demultiplexers. 3. Control signal generation in digital systems. 4. Logic circuit design and implementation.

Detailed and Complete Alternative Models

Some alternative models that offer similar functionality to SN74LS139ANSR are: 1. 74HC139: High-speed CMOS logic dual 2-to-4 line decoder/demultiplexer. 2. CD74HC139: High-speed CMOS logic dual 2-to-4 line decoder/demultiplexer. 3. SN54LS139: Low-power Schottky logic dual 2-to-4 line decoder/demultiplexer.

These alternative models can be considered based on specific requirements and compatibility with existing systems.

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