TC74VHCT138AFTEL

Basic Information Overview

• Category: Integrated Circuit (IC)
• Use: Decoding and demultiplexing digital signals
• Characteristics: High-speed operation, low power consumption, wide operating voltage range
• Package: TSSOP (Thin Shrink Small Outline Package)
• Essence: 3-to-8 line decoder/demultiplexer
• Packaging/Quantity: Tape and Reel, 2500 pieces per reel

Specifications

• Supply Voltage Range: 2.0V to 5.5V
• Input Voltage Range: 0V to VCC
• Output Voltage Range: 0V to VCC
• Operating Temperature Range: -40°C to +85°C
• Maximum Propagation Delay Time: 7 ns
• Maximum Quiescent Current: 4 μA

Detailed Pin Configuration

The TC74VHCT138AFTEL has a total of 16 pins. The pin configuration is as follows:

1. GND (Ground)
2. A0 (Address Input 0)
3. A1 (Address Input 1)
4. A2 (Address Input 2)
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 (Supply Voltage)
16. NC (No Connection)

Functional Features

• Decodes a 3-bit binary input into one of eight outputs
• Demultiplexes the selected output based on the enable inputs
• High-speed operation allows for quick signal processing
• Low power consumption makes it suitable for battery-powered devices
• Wide operating voltage range provides flexibility in various applications

Advantages and Disadvantages

Advantages: - Fast propagation delay time ensures efficient signal decoding - Low quiescent current minimizes power consumption - Wide supply voltage range allows for compatibility with different systems

Disadvantages: - Limited to 3-bit input decoding, not suitable for higher bit counts - TSSOP package may require careful handling during assembly

Working Principles

The TC74VHCT138AFTEL operates by accepting a 3-bit binary input (A0, A1, A2) and decoding it into one of eight possible outputs (Y0 to Y7). The selected output is determined by the combination of the address inputs and the enable inputs (E1, E2). When the enable inputs are active, the corresponding output is enabled, allowing the demultiplexing of the input signal.

Detailed Application Field Plans

The TC74VHCT138AFTEL can be used in various applications, including: 1. Address decoding in microcontrollers and microprocessors 2. Memory selection in digital systems 3. Data routing in communication systems 4. Signal demultiplexing in data acquisition systems 5. Control logic in industrial automation

Detailed and Complete Alternative Models

1. SN74LS138: Similar 3-to-8 line decoder/demultiplexer from Texas Instruments
2. CD74HC138: High-speed CMOS 3-to-8 line decoder/demultiplexer from Texas Instruments
3. MC14538B: Dual 1-of-4 decoder/demultiplexer from ON Semiconductor

These alternative models offer similar functionality and can be considered as substitutes for the TC74VHCT138AFTEL.

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