CD74HCT139EG4

Product Overview

• Category: Integrated Circuit (IC)
• Use: Decoder/Demultiplexer
• Characteristics: High-speed, CMOS logic, dual 2-to-4 line decoder/demultiplexer
• Package: 16-pin SOIC (Small Outline Integrated Circuit)
• Essence: Converts binary input signals into corresponding output lines
• Packaging/Quantity: Available in reels of 2500 units

Specifications

• Supply Voltage Range: 2V to 6V
• Input Voltage Range: 0V to VCC
• Output Voltage Range: 0V to VCC
• Maximum Operating Frequency: 25 MHz
• Propagation Delay Time: 15 ns (typical)
• Low Power Consumption: 4µA (maximum)

Detailed Pin Configuration

The CD74HCT139EG4 has a total of 16 pins. The pin configuration is as follows:

1. A0 - Binary input line A0
2. A1 - Binary input line A1
3. GND - Ground reference voltage
4. Y0 - Output line Y0
5. Y1 - Output line Y1
6. Y2 - Output line Y2
7. Y3 - Output line Y3
8. VCC - Positive power supply voltage
9. E1 - Enable input 1
10. E2 - Enable input 2
11. B - Binary input line B
12. C - Binary input line C
13. Y4 - Output line Y4
14. Y5 - Output line Y5
15. Y6 - Output line Y6
16. Y7 - Output line Y7

Functional Features

• Dual 2-to-4 Line Decoder/Demultiplexer: Can decode two separate 2-bit binary inputs into four output lines
• High-Speed Operation: Capable of operating at frequencies up to 25 MHz
• CMOS Logic: Utilizes complementary metal-oxide-semiconductor technology for low power consumption and high noise immunity
• Enable Inputs: Allows the user to enable or disable the decoder/demultiplexer functionality

Advantages and Disadvantages

Advantages: - High-speed operation enables quick data processing - Low power consumption makes it suitable for battery-powered devices - CMOS logic provides excellent noise immunity - Compact SOIC package allows for easy integration into circuit designs

Disadvantages: - Limited number of output lines (4 in total) - Requires external components for complete functionality - Not suitable for applications requiring a larger number of input/output lines

Working Principles

The CD74HCT139EG4 is a decoder/demultiplexer IC that converts binary input signals into corresponding output lines. It consists of two separate 2-to-4 line decoders, each capable of decoding a 2-bit binary input into four output lines. The enable inputs (E1 and E2) control the functionality of the decoder/demultiplexer.

When the enable inputs are active (high), the decoder/demultiplexer operates normally, converting the binary inputs (A0, A1, B, C) into the corresponding output lines (Y0-Y7). When one or both of the enable inputs are inactive (low), all output lines are forced to a high impedance state.

Detailed Application Field Plans

The CD74HCT139EG4 can be used in various applications, including:

1. Address Decoding: Used in microcontrollers and memory systems to decode address signals and select specific memory locations.
2. Data Routing: Enables the selection of specific data paths in multiplexing applications, such as data buses and communication systems.
3. Signal Demultiplexing: Splits a single input signal into multiple output signals, allowing for data distribution in communication networks.
4. Code Conversion: Converts binary codes into other formats, such as Gray code or BCD (Binary Coded Decimal).

Detailed and Complete Alternative Models

1. 74HC139: Similar dual 2-to-4 line decoder/demultiplexer IC with slightly different electrical characteristics.
2. CD74HCT238: 3-to-8 line decoder/demultiplexer IC with similar functionality but a larger number of input/output lines.
3. SN74LS138: Another popular 3-to-8 line decoder/demultiplexer IC with different logic technology (TTL) and electrical characteristics.

These alternative models provide similar functionality to the CD74HCT139EG4 and can be used as substitutes depending on specific requirements and design constraints.

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