CD74HCT138MTG4

Product Overview

• Category: Integrated Circuit
• Use: Decoder/Demultiplexer
• Characteristics: High-Speed CMOS Logic, 3-to-8 Line Decoder/Demultiplexer
• Package: TSSOP (Thin Shrink Small Outline Package)
• Essence: The CD74HCT138MTG4 is a decoder/demultiplexer IC that converts a binary input into a corresponding output line. It is commonly used in digital electronics for addressing and decoding purposes.
• Packaging/Quantity: The CD74HCT138MTG4 is typically sold in reels or tubes, with a quantity 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: 15 ns (max) at 5V supply voltage
• Output Current: ±25mA
• Number of Inputs: 3
• Number of Outputs: 8

Pin Configuration

The CD74HCT138MTG4 has a total of 16 pins. The pin configuration is as follows:

1. GND (Ground)
2. A2 (Binary Input 2)
3. A1 (Binary Input 1)
4. A0 (Binary Input 0)
5. E1 (Enable Input 1)
6. Y0 (Output 0)
7. Y1 (Output 1)
8. Y2 (Output 2)
9. Y3 (Output 3)
10. Y4 (Output 4)
11. Y5 (Output 5)
12. Y6 (Output 6)
13. Y7 (Output 7)
14. E2 (Enable Input 2)
15. VCC (Positive Power Supply)
16. GND (Ground)

Functional Features

• Converts a 3-bit binary input into one of the eight corresponding output lines.
• Enables easy decoding and demultiplexing of digital signals.
• High-speed operation with minimal propagation delay time.
• Wide supply voltage range allows compatibility with various digital systems.
• Low power consumption.

Advantages and Disadvantages

Advantages: - Fast and efficient decoding/demultiplexing functionality. - Wide operating temperature range. - Compact TSSOP package for space-saving designs. - Low power consumption.

Disadvantages: - Limited number of inputs and outputs. - Requires external enable inputs for full functionality.

Working Principles

The CD74HCT138MTG4 works based on the principles of combinational logic. The three binary input lines (A2, A1, A0) determine which of the eight output lines (Y0 to Y7) will be active. The enable inputs (E1 and E2) control the overall operation of the decoder/demultiplexer. When the enable inputs are activated, the selected output line becomes active, while all other output lines remain inactive.

Detailed Application Field Plans

The CD74HCT138MTG4 is widely used in various digital applications, including but not limited to:

1. Address decoding in microcontrollers and microprocessors.
2. Memory selection and expansion in computer systems.
3. Data routing and selection in multiplexers.
4. Signal demultiplexing in communication systems.
5. Control signal generation in industrial automation.

Detailed and Complete Alternative Models

1. SN74LS138N: Similar 3-to-8 line decoder/demultiplexer IC from Texas Instruments.
2. CD74HC138E: High-speed CMOS logic decoder/demultiplexer from Texas Instruments.
3. 74HCT138: Standard 3-to-8 line decoder/demultiplexer IC.

These alternative models offer similar functionality and can be used as substitutes for the CD74HCT138MTG4 in various applications.

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