SN74HCT139DR

Product Overview

• Category: Integrated Circuit (IC)
• Use: Decoder/Demultiplexer
• Characteristics: High-speed, CMOS technology
• Package: SOIC (Small Outline Integrated Circuit)
• Essence: Dual 2-to-4 line decoder/demultiplexer
• Packaging/Quantity: Tape and Reel, 2500 pieces per reel

Specifications

• Supply Voltage Range: 2V to 6V
• Input Voltage Range: 0V to VCC
• Output Voltage Range: 0V to VCC
• Maximum Operating Frequency: 25 MHz
• Number of Inputs: 2
• Number of Outputs: 4
• Logic Family: HCT (High-Speed CMOS)

Detailed Pin Configuration

The SN74HCT139DR has a total of 16 pins. The pin configuration is as follows:

1. GND (Ground)
2. A0 (Input A0)
3. A1 (Input A1)
4. Y0 (Output Y0)
5. Y1 (Output Y1)
6. Y2 (Output Y2)
7. Y3 (Output Y3)

8. VCC (Positive Power Supply)

9. /G (Enable Input)

10. /Y0 (Inverted Output Y0)
11. /Y1 (Inverted Output Y1)
12. /Y2 (Inverted Output Y2)
13. /Y3 (Inverted Output Y3)
14. /A0 (Inverted Input A0)
15. /A1 (Inverted Input A1)
16. GND (Ground)

Functional Features

The SN74HCT139DR is a dual 2-to-4 line decoder/demultiplexer IC. It takes two binary inputs (A0 and A1) and decodes them into four mutually exclusive outputs (Y0, Y1, Y2, and Y3). The /G (Enable) input controls the operation of the decoder/demultiplexer. When /G is low, the outputs are enabled based on the input values. When /G is high, all outputs are in a high-impedance state.

Advantages and Disadvantages

Advantages: - High-speed operation - Wide supply voltage range - Low power consumption - Compact SOIC package - Easy to use and integrate into circuits

Disadvantages: - Limited number of inputs and outputs - Not suitable for complex decoding applications

Working Principles

The SN74HCT139DR operates based on CMOS technology. It uses a combination of logic gates to decode the binary inputs and generate the corresponding outputs. The /G input enables or disables the output signals based on its logic level. The IC operates within a specified supply voltage range and can handle high-frequency signals with minimal delay.

Detailed Application Field Plans

The SN74HCT139DR is commonly used in various digital systems and applications, including:

1. Address decoding in microcontrollers and microprocessors.
2. Memory selection and control in RAM and ROM devices.
3. Data routing and selection in multiplexers and data selectors.
4. Signal demultiplexing in communication systems.
5. Control signal generation in digital circuits.

Detailed and Complete Alternative Models

1. 74HC139: Similar dual 2-to-4 line decoder/demultiplexer IC with TTL logic family.
2. CD74HC139: Dual 2-to-4 line decoder/demultiplexer IC with high-speed CMOS logic.
3. MC74HCT139: Dual 2-to-4 line decoder/demultiplexer IC with Schottky TTL logic.

These alternative models provide similar functionality and can be used as replacements for the SN74HCT139DR in various applications.

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