SN74ALS518DWE4

Product Overview

• Category: Integrated Circuit (IC)
• Use: Logic Function
• Characteristics: High-speed, low-power Schottky TTL technology
• Package: SOIC (Small Outline Integrated Circuit)
• Essence: 8-bit multiplexer with three-state outputs
• Packaging/Quantity: Tape and reel, 2500 units per reel

Specifications

• Supply Voltage Range: 4.5V to 5.5V
• Input Voltage Range: 0V to VCC
• Output Voltage Range: 0V to VCC
• Operating Temperature Range: -40°C to +85°C
• Propagation Delay Time: 9ns (typical)
• Power Dissipation: 500mW (max)

Detailed Pin Configuration

The SN74ALS518DWE4 has a total of 20 pins. The pin configuration is as follows:

1. A0 - Input A0
2. A1 - Input A1
3. A2 - Input A2
4. A3 - Input A3
5. A4 - Input A4
6. A5 - Input A5
7. A6 - Input A6
8. A7 - Input A7
9. G - Enable Input
10. Y - Output Y
11. B0 - Input B0
12. B1 - Input B1
13. B2 - Input B2
14. B3 - Input B3
15. B4 - Input B4
16. B5 - Input B5
17. B6 - Input B6
18. B7 - Input B7
19. VCC - Positive Power Supply
20. GND - Ground

Functional Features

The SN74ALS518DWE4 is an 8-bit multiplexer with three-state outputs. It allows the selection of one of eight data inputs (A0-A7 or B0-B7) to be routed to the output Y based on the control input G. When G is high, the outputs are in a high-impedance state, effectively disconnecting them from the selected input. This feature enables multiple devices to share a common bus without interference.

Advantages and Disadvantages

Advantages: - High-speed operation - Low-power consumption - Three-state outputs for bus sharing - Wide operating temperature range

Disadvantages: - Limited input/output voltage range - Requires external enable signal for proper operation

Working Principles

The SN74ALS518DWE4 operates based on Schottky transistor-transistor logic (TTL) technology. It utilizes multiplexing to select one of the input signals and route it to the output based on the control input. The three-state outputs allow for bus sharing, enabling multiple devices to communicate over a shared data bus without conflicts.

Detailed Application Field Plans

The SN74ALS518DWE4 finds applications in various fields where data multiplexing and bus sharing are required. Some of the detailed application field plans include:

1. Data communication systems: Used for selecting different data sources in communication networks.
2. Industrial automation: Enables the selection of various sensor inputs for processing and control purposes.
3. Automotive electronics: Allows for the routing of different sensor signals to the central processing unit.
4. Test and measurement equipment: Used for signal routing and selection in testing and measurement setups.
5. Computer peripherals: Enables the selection of different input/output devices connected to a computer system.

Detailed and Complete Alternative Models

1. SN74ALS519DWE4: Similar to SN74ALS518DWE4 but with inverted outputs.
2. SN74ALS520DWE4: 8-bit multiplexer with non-inverting outputs.
3. SN74ALS521DWE4: 8-bit multiplexer with latched outputs for data storage.

These alternative models provide similar functionality to the SN74ALS518DWE4 but may have different characteristics or additional features based on specific requirements.

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