SN74LS138NSRG4

Product Overview

Category

SN74LS138NSRG4 belongs to the category of integrated circuits (ICs).

Use

This product is commonly used in digital electronics and computer systems for decoding purposes.

Characteristics

• Low-power Schottky technology
• 3-line to 8-line decoder/demultiplexer
• Active low outputs
• High fan-out capability
• Wide operating temperature range: -40°C to 85°C

Package

SN74LS138NSRG4 is available in a small-outline package (SOIC) with 16 pins.

Essence

The essence of SN74LS138NSRG4 lies in its ability to decode three binary inputs into eight mutually exclusive outputs.

Packaging/Quantity

This product is typically packaged in reels, with each reel containing 2500 units.

Specifications

• Supply voltage: 4.75V to 5.25V
• Input voltage: 0V to VCC
• Output voltage: 0V to VCC
• Maximum input current: ±1mA
• Maximum output current: ±8mA
• Propagation delay time: 15ns (max)
• Power dissipation: 50mW (max)

Detailed Pin Configuration

1. GND (Ground)
2. A0 (Input A0)
3. A1 (Input A1)
4. A2 (Input A2)
5. E1 (Enable Input 1)
6. E2 (Enable Input 2)
7. E3 (Enable Input 3)
8. Y0 (Output Y0)
9. Y1 (Output Y1)
10. Y2 (Output Y2)
11. Y3 (Output Y3)
12. Y4 (Output Y4)
13. Y5 (Output Y5)
14. Y6 (Output Y6)
15. Y7 (Output Y7)
16. VCC (Supply Voltage)

Functional Features

• Decodes three binary inputs into eight mutually exclusive outputs
• Active low outputs allow easy interfacing with other digital components
• High fan-out capability enables driving multiple loads
• Low-power Schottky technology ensures efficient operation

Advantages and Disadvantages

Advantages

• Compact size and high integration
• Wide operating temperature range
• Low power consumption
• Reliable performance

Disadvantages

• Limited number of input combinations
• Not suitable for applications requiring complex decoding logic

Working Principles

SN74LS138NSRG4 operates based on the principle of combinational logic. The three input lines (A0, A1, and A2) represent the binary input code. Depending on the combination of these inputs, one of the eight output lines (Y0 to Y7) is activated. The enable inputs (E1, E2, and E3) control the functioning of the decoder/demultiplexer.

Detailed Application Field Plans

SN74LS138NSRG4 finds applications in various fields, including: 1. Address decoding in microprocessors and memory systems 2. Data routing and selection in digital communication systems 3. Control signal generation in industrial automation 4. Display multiplexing in electronic devices 5. Logic circuit design and prototyping

Detailed and Complete Alternative Models

Some alternative models that can be considered as alternatives to SN74LS138NSRG4 are: 1. 74HC138: High-speed CMOS version of the decoder/demultiplexer 2. CD74HCT138: High-speed TTL-compatible version with Schmitt-trigger inputs 3. DM74LS138: Standard TTL version with similar functionality

These alternative models offer similar decoding capabilities and can be chosen based on specific requirements and compatibility with the existing system.

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