SN74LV138ADG4

Product Overview

• Category: Integrated Circuit (IC)
• Use: Decoder/Demultiplexer
• Characteristics: Low-voltage, 3-to-8 line decoder/demultiplexer
• Package: SOIC (Small Outline Integrated Circuit)
• Essence: Converts binary information to a corresponding output based on the input selection
• Packaging/Quantity: Available in reels of 2500 pieces

Specifications

• Supply Voltage Range: 1.65V to 5.5V
• High-Level Input Voltage: 2V to VCC + 0.5V
• Low-Level Input Voltage: -0.5V to 0.8V
• High-Level Output Current: -12mA
• Low-Level Output Current: 12mA
• Operating Temperature Range: -40°C to 85°C

Detailed Pin Configuration

The SN74LV138ADG4 has a total of 16 pins:

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 (Positive Power Supply)
16. GND (Ground)

Functional Features

The SN74LV138ADG4 is a low-voltage decoder/demultiplexer IC that takes a 3-bit binary input and generates an active-low output based on the input selection. It features two enable inputs (E1 and E2) that control the operation of the decoder/demultiplexer. When both enable inputs are high, all outputs are in a high-impedance state.

Advantages and Disadvantages

Advantages: - Low-voltage operation allows for compatibility with a wide range of systems - Compact SOIC package enables space-saving integration - High-speed operation for efficient decoding/demultiplexing

Disadvantages: - Limited to 3-bit input, restricting the number of possible combinations - Not suitable for applications requiring higher bit decoding

Working Principles

The SN74LV138ADG4 operates by using the input address lines (A0, A1, and A2) to select one of the eight output lines (Y0 to Y7). The enable inputs (E1 and E2) control the activation of the decoder/demultiplexer. When both enable inputs are high, the outputs are disabled.

Detailed Application Field Plans

The SN74LV138ADG4 is commonly used in various digital systems where decoding or demultiplexing is required. Some application fields include:

1. Address decoding in microcontrollers and microprocessors
2. Memory selection in RAM and ROM systems
3. Data routing in communication systems
4. Signal demultiplexing in multimedia devices
5. Control signal generation in industrial automation

Detailed and Complete Alternative Models

1. SN74LV139A: Dual 2-to-4 line decoder/demultiplexer
2. SN74HC138: 3-to-8 line decoder/demultiplexer with higher voltage tolerance
3. CD74HC238: 3-to-8 line decoder/demultiplexer with complementary outputs

These alternative models offer similar functionality but may have different voltage ranges, package types, or additional features.

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