SN74S139AN

Product Overview

• Category: Integrated Circuit (IC)
• Use: Decoder/Demultiplexer
• Characteristics: Dual 2-to-4 Line Decoder/Demultiplexer, TTL Logic Level
• Package: DIP (Dual In-line Package)
• Essence: High-performance digital logic device for decoding and demultiplexing applications
• Packaging/Quantity: Available in tubes or reels, quantity varies based on supplier

Specifications

• Supply Voltage Range: 4.75V to 5.25V
• Input Voltage Range: 0V to VCC
• Output Voltage Range: 0V to VCC
• Operating Temperature Range: -40°C to +85°C
• Propagation Delay Time: 10ns (typical)
• Output Current: ±8mA
• Power Dissipation: 500mW (max)

Detailed Pin Configuration

The SN74S139AN has a total of 16 pins, which are assigned as follows:

1. GND (Ground)
2. A0 (Address Input 0)
3. A1 (Address Input 1)
4. E1 (Enable Input 1)
5. Y0 (Output 0)
6. Y1 (Output 1)
7. GND (Ground)
8. Y2 (Output 2)
9. Y3 (Output 3)
10. E2 (Enable Input 2)
11. A2 (Address Input 2)
12. A3 (Address Input 3)
13. VCC (Positive Power Supply)
14. Y4 (Output 4)
15. Y5 (Output 5)
16. GND (Ground)

Functional Features

• Dual 2-to-4 line decoder/demultiplexer functionality
• TTL (Transistor-Transistor Logic) compatible inputs and outputs
• Low power consumption
• High-speed operation
• Wide operating temperature range

Advantages and Disadvantages

Advantages: - Versatile decoder/demultiplexer for various applications - Compatible with TTL logic levels - Fast propagation delay time - Low power consumption

Disadvantages: - Limited output current capacity - Requires external pull-up resistors for proper operation

Working Principles

The SN74S139AN is designed to decode two address inputs (A0 and A1) and enable inputs (E1 and E2) to select one of four possible outputs. The selected output is determined by the combination of address inputs and enable inputs.

When the enable inputs are active (low), the decoder/demultiplexer decodes the address inputs and activates the corresponding output line. The selected output line goes low, while all other output lines remain high.

Detailed Application Field Plans

The SN74S139AN can be used in various applications, including but not limited to:

1. Memory decoding: Selecting specific memory locations based on address inputs
2. Data routing: Dividing data streams into multiple channels based on address inputs
3. Address decoding: Enabling specific devices or peripherals based on address inputs
4. Signal demultiplexing: Distributing a single input signal to multiple outputs based on address inputs

Detailed and Complete Alternative Models

Some alternative models that offer similar functionality to the SN74S139AN include:

1. 74HC139: CMOS Logic Dual 2-to-4 Line Decoder/Demultiplexer
2. CD74HCT139: High-Speed CMOS Logic Dual 2-to-4 Line Decoder/Demultiplexer
3. MC74HC139: High-Performance Silicon-Gate CMOS Dual 2-to-4 Line Decoder/Demultiplexer

These alternative models provide comparable features and can be used as substitutes for the SN74S139AN in various applications.

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