MC74ACT139DTR2

Product Overview

• Category: Integrated Circuit (IC)
• Use: Decoder/Demultiplexer
• Characteristics: High-speed, low-power consumption
• Package: SOIC-16
• Essence: Digital logic decoder/demultiplexer
• Packaging/Quantity: Tape and Reel, 2500 units per reel

Specifications

• Logic Family: ACT
• Number of Inputs: 2
• Number of Outputs: 4
• Supply Voltage: 2.0V to 6.0V
• Operating Temperature Range: -40°C to +85°C
• Propagation Delay: 5 ns (typical)
• Output Current: ±24 mA
• Input Capacitance: 3 pF (typical)

Detailed Pin Configuration

The MC74ACT139DTR2 has a total of 16 pins arranged 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 (Supply Voltage)
9. B1 (Input B1)
10. B0 (Input B0)
11. G1 (Enable Input G1)
12. G2A (Enable Input G2A)
13. G2B (Enable Input G2B)
14. Y0 (Output Y0)
15. Y1 (Output Y1)
16. Y2 (Output Y2)

Functional Features

The MC74ACT139DTR2 is a dual 2-to-4 decoder/demultiplexer IC. It takes two binary inputs (A0 and A1) and two enable inputs (G1 and G2) to generate four outputs (Y0, Y1, Y2, and Y3). The decoder/demultiplexer is designed to convert the binary input combination into a specific output line.

The enable inputs (G1 and G2) control the operation of the decoder. When G1 is low, the decoder is disabled, and all outputs are in a high-impedance state. When G1 is high, the decoder is enabled, and the outputs are determined by the binary input combination (A0 and A1).

The MC74ACT139DTR2 operates at high speed with low power consumption, making it suitable for various digital logic applications.

Advantages and Disadvantages

Advantages: - High-speed operation - Low-power consumption - Compact package size - Wide operating voltage range - Multiple outputs for versatile applications

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

Working Principles

The MC74ACT139DTR2 works based on the principles of digital logic decoding. It uses combinational logic circuits to decode the binary input combination into a specific output line. The enable inputs control the operation of the decoder, enabling or disabling the outputs based on their logic levels.

When the decoder is enabled, the binary input combination determines which output line will be active. For example, if A0 = 0 and A1 = 1, the output Y2 will be active, while the other outputs remain inactive.

Detailed Application Field Plans

The MC74ACT139DTR2 can be used in various applications that require decoding or demultiplexing of binary signals. Some potential application fields include:

1. Address Decoding: Used in microcontrollers and memory systems to decode address lines and select specific memory locations.
2. Data Routing: Used in data communication systems to route data signals to different destinations based on the input combination.
3. Display Control: Used in multiplexed display systems to select specific segments or digits for driving LED or LCD displays.
4. Signal Demultiplexing: Used in digital communication systems to demultiplex a single data stream into multiple channels.

Detailed and Complete Alternative Models

1. SN74ACT139N: Similar dual 2-to-4 decoder/demultiplexer IC from Texas Instruments.
2. CD74ACT139E: Dual 2-to-4 decoder/demultiplexer IC from ON Semiconductor.
3. 74HC139: Dual 2-to-4 decoder/demultiplexer IC from NXP Semiconductors.

These alternative models offer similar functionality and can be used as substitutes for the MC74ACT139DTR2 in various applications.

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