SN74LV138ADGVR

Product Overview

• Category: Integrated Circuit (IC)
• Use: Decoder/Demultiplexer
• Characteristics: Low-voltage, 3-to-8 line decoder/demultiplexer
• Package: VSSOP (Very Small Outline Package)
• Essence: Converts binary information to a decoded output
• Packaging/Quantity: Tape and Reel, 2500 units per reel

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 SN74LV138ADGVR 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. /G1 (Enable Input)
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. VCC (Positive Power Supply)
15. /G2A (Enable Input)
16. /G2B (Enable Input)

Functional Features

The SN74LV138ADGVR is a low-voltage decoder/demultiplexer IC that converts a 3-bit binary input into an 8-line output. It features three address inputs (A0, A1, and A2) that determine the selected output line based on the binary input. The /G1 enable input is used to activate the decoder/demultiplexer.

Advantages and Disadvantages

Advantages: - Low-voltage operation allows for compatibility with a wide range of systems - Compact VSSOP package saves board space - High-speed operation for efficient decoding

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

Working Principles

The SN74LV138ADGVR works by utilizing a combination of logic gates to decode the binary input and activate the corresponding output line. The address inputs determine which output line is enabled, while the enable inputs (/G1, /G2A, and /G2B) control the overall operation of the decoder/demultiplexer.

Detailed Application Field Plans

The SN74LV138ADGVR finds applications in various fields, including:

1. Digital Electronics: Used in digital systems for address decoding and signal routing.
2. Memory Systems: Enables selection of specific memory locations in RAM or ROM.
3. Data Multiplexing: Facilitates data routing in communication systems.
4. Control Systems: Allows for precise control of multiple devices based on address inputs.

Detailed and Complete Alternative Models

1. SN74LS138: Similar 3-to-8 line decoder/demultiplexer with TTL-level inputs and outputs.
2. CD74HC138: High-speed CMOS decoder/demultiplexer with similar functionality.
3. 74HCT138: CMOS decoder/demultiplexer with Schmitt-trigger inputs for noise immunity.

These alternative models offer similar functionality to the SN74LV138ADGVR but may have different voltage levels, speed, or package options.

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