SN74LVC138AGQNR

Product Overview

• Category: Integrated Circuit (IC)
• Use: Decoder/Demultiplexer
• Characteristics:
  • Low-voltage CMOS technology
  • High-speed operation
  • Low power consumption
  • Wide operating voltage range
• Package: VQFN-20
• Essence: A decoder/demultiplexer IC that converts a binary input into a corresponding output line.
• Packaging/Quantity: Tape and reel, 2500 units per reel.

Specifications

• Supply Voltage Range: 1.65V 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: 6 ns
• Maximum Quiescent Current: 2 μA
• Maximum Output Current: ±24 mA

Detailed Pin Configuration

The SN74LVC138AGQNR has a total of 20 pins, which are assigned as follows:

1. GND (Ground)
2. Y0 (Output 0)
3. Y1 (Output 1)
4. Y2 (Output 2)
5. G1 (Enable Input 1)
6. A0 (Address Input 0)
7. A1 (Address Input 1)
8. A2 (Address Input 2)
9. VCC (Supply Voltage)
10. Y3 (Output 3)
11. Y4 (Output 4)
12. Y5 (Output 5)
13. G2A (Enable Input 2A)
14. G2B (Enable Input 2B)
15. NC (No Connection)
16. Y6 (Output 6)
17. Y7 (Output 7)
18. GND (Ground)
19. NC (No Connection)
20. NC (No Connection)

Functional Features

• Converts a 3-bit binary input into one of eight corresponding output lines.
• Enables cascading multiple ICs for larger decoding applications.
• Low power consumption makes it suitable for battery-powered devices.
• High-speed operation allows for efficient data processing.
• Wide operating voltage range ensures compatibility with various systems.

Advantages and Disadvantages

Advantages: - Compact VQFN-20 package saves board space. - Low power consumption extends battery life. - High-speed operation enables quick data processing. - Wide operating voltage range provides flexibility in system design.

Disadvantages: - Limited number of output lines (8) compared to other decoder ICs. - Not suitable for high-voltage applications.

Working Principles

The SN74LVC138AGQNR operates based on the principle of binary decoding. The three address inputs (A0, A1, A2) represent a binary code, which is converted into one of the eight output lines (Y0-Y7). The enable inputs (G1, G2A, G2B) control the functioning of the decoder/demultiplexer. When the enable inputs are active, the selected output line reflects the binary input code.

Detailed Application Field Plans

The SN74LVC138AGQNR finds applications in various fields, including:

1. Digital electronics: Used in microcontrollers, CPUs, and memory systems for address decoding.
2. Communication systems: Employed in multiplexing and demultiplexing circuits.
3. Industrial automation: Integrated into control systems for signal routing and selection.
4. Automotive electronics: Utilized in vehicle control units for decoding sensor inputs.
5. Consumer electronics: Incorporated in remote control systems and audio/video equipment.

Detailed and Complete Alternative Models

1. CD74HC138E: High-speed CMOS logic decoder with similar functionality.
2. 74HC138N: Standard TTL logic decoder with comparable specifications.
3. SN54LS138J: Low-power Schottky TTL decoder/demultiplexer.

These alternative models offer similar decoding capabilities and can be used as substitutes for the SN74LVC138AGQNR in various applications.

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