SN74LV138AD

Product Overview

• Category: Integrated Circuit
• Use: Decoding/Demultiplexing
• Characteristics: Low-voltage, high-speed, 3-to-8 line decoder/demultiplexer
• Package: SOIC (Small Outline Integrated Circuit)
• Essence: Efficiently decodes binary information for various applications
• Packaging/Quantity: Available in reels of 2500 units

Specifications

• Supply Voltage: 2V to 5.5V
• High-Level Input Voltage: 2V to VCC
• Low-Level Input Voltage: GND to 0.8V
• Output Voltage: 0V to VCC
• Operating Temperature Range: -40°C to 85°C
• Propagation Delay (Max): 10ns at 5V
• Power Dissipation (Max): 33mW at 5V

Detailed Pin Configuration

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

Functional Features

• Decodes three binary weighted address inputs into eight mutually exclusive outputs
• Ideal for memory address decoding or demultiplexing applications
• High-speed operation and low power consumption
• Wide supply voltage range allows compatibility with various systems

Advantages and Disadvantages

Advantages

• Low-voltage operation enables integration into battery-powered devices
• High-speed performance suits time-critical applications
• Small package size saves board space
• Versatile application in digital systems

Disadvantages

• Limited output current capability
• Sensitivity to voltage fluctuations in noisy environments

Working Principles

The SN74LV138AD operates by decoding the input address lines A0, A1, and A2 to select one of the eight outputs based on the binary value presented at the inputs. The enable inputs E1 and E2 control the operation, allowing the device to be activated or deactivated as needed.

Detailed Application Field Plans

• Memory address decoding in microcontroller-based systems
• Demultiplexing data in communication interfaces
• Address selection in memory modules and storage devices
• Control signal generation in digital control systems

Detailed and Complete Alternative Models

• SN74LS138: Similar functionality but operates at higher voltages
• CD74HC238: Compatible alternative with different package options
• 74F138: Faster operating speed but requires higher power supply voltage

In conclusion, the SN74LV138AD is a versatile and efficient decoder/demultiplexer integrated circuit suitable for a wide range of digital system applications. Its low-voltage operation, high-speed performance, and compact package make it an attractive choice for designers seeking reliable address decoding solutions.

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