TC74AC138FTEL

Product Overview

• Category: Integrated Circuit (IC)
• Use: Decoder/Demultiplexer
• Characteristics: High-speed, low-power consumption
• Package: TSSOP (Thin Shrink Small Outline Package)
• Essence: Decodes binary input signals into multiple output lines
• Packaging/Quantity: Tape and Reel, 2500 units per reel

Specifications

• Supply Voltage: 2.0V to 6.0V
• Input Voltage: 0V to VCC
• Output Voltage: 0V to VCC
• Maximum Operating Frequency: 74 MHz
• Number of Inputs: 3
• Number of Outputs: 8
• Propagation Delay Time: 5 ns (typical)

Detailed Pin Configuration

The TC74AC138FTEL has a total of 16 pins, which are assigned as follows:

1. GND - Ground
2. A0 - Binary Input 0
3. A1 - Binary Input 1
4. A2 - Binary Input 2
5. Y0 - Output 0
6. Y1 - Output 1
7. Y2 - Output 2
8. Y3 - Output 3
9. Y4 - Output 4
10. Y5 - Output 5
11. Y6 - Output 6
12. Y7 - Output 7
13. E1 - Enable Input 1
14. E2 - Enable Input 2
15. VCC - Power Supply
16. NC - No Connection

Functional Features

• Decodes 3-bit binary inputs into 8 output lines
• Enables individual output lines based on the input combination
• Low power consumption due to advanced CMOS technology
• High-speed operation allows for efficient signal decoding

Advantages and Disadvantages

Advantages: - High-speed operation enables quick signal decoding - Low power consumption makes it suitable for battery-powered devices - Compact TSSOP package saves board space - Wide supply voltage range allows for versatile applications

Disadvantages: - Limited number of inputs and outputs restricts complex decoding operations - Propagation delay may affect timing-sensitive applications

Working Principles

The TC74AC138FTEL is a decoder/demultiplexer IC that converts binary input signals into multiple output lines. It utilizes a combination of logic gates to enable specific output lines based on the input combination. The enable inputs (E1 and E2) control the activation of the output lines, while the binary inputs (A0, A1, and A2) determine which output lines are enabled.

Detailed Application Field Plans

The TC74AC138FTEL 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 data selection and routing in multiplexing applications, such as data buses and communication systems.
3. Display Control: Controls the activation of different segments or digits in LED displays, allowing for dynamic content presentation.
4. Signal Demultiplexing: Splits a single input signal into multiple output signals, useful in audio/video distribution systems.

Detailed and Complete Alternative Models

1. 74HC138: Similar functionality with a wider supply voltage range (2V to 6V).
2. CD74AC138: Higher operating frequency (100 MHz) but with a smaller package (SOIC).

These alternative models offer similar decoding capabilities with slight variations in specifications and packaging options.

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