DM74ALS251N

Product Overview

• Category: Integrated Circuit (IC)
• Use: Logic Multiplexer
• Characteristics: High-speed, TTL compatible, 8-input multiplexer
• Package: DIP (Dual In-line Package)
• Essence: The DM74ALS251N is a versatile logic multiplexer that allows the selection of one out of eight input signals to be routed to a single output.
• Packaging/Quantity: Available in tubes or reels, with quantities varying based on customer requirements.

Specifications

• Logic Family: Advanced Low-Power Schottky (ALS)
• Number of Inputs: 8
• Number of Outputs: 1
• Supply Voltage: 4.5V to 5.5V
• Operating Temperature Range: -40°C to +85°C
• Propagation Delay: 9ns (typical)
• Output Current: ±24mA
• Input Current: ±0.4mA
• Package Type: 16-pin DIP

Detailed Pin Configuration

The DM74ALS251N has a total of 16 pins, each serving a specific purpose. Here is the detailed pin configuration:

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. GND: Ground
10. Y: Output Y
11. E: Enable Input
12. VCC: Supply Voltage
13. B: Input B
14. C: Input C
15. D: Input D
16. F: Input F

Functional Features

• High-speed operation: The DM74ALS251N offers fast switching times, making it suitable for applications requiring quick data selection.
• TTL compatibility: This logic multiplexer is designed to be compatible with TTL (Transistor-Transistor Logic) circuits, ensuring seamless integration into existing systems.
• Wide operating voltage range: With a supply voltage range of 4.5V to 5.5V, the DM74ALS251N can operate in various power supply environments.
• Low power consumption: The ALS technology used in this IC ensures efficient power usage, minimizing energy consumption.

Advantages and Disadvantages

Advantages: - Fast propagation delay allows for high-speed data selection. - Compatibility with TTL circuits simplifies integration. - Versatile input selection capability enhances flexibility in system design. - Low power consumption contributes to energy efficiency.

Disadvantages: - Limited number of inputs may not be suitable for applications requiring more than eight input signals. - DIP package may not be ideal for space-constrained designs.

Working Principles

The DM74ALS251N operates based on the principle of multiplexing, where one output is selected from multiple input signals. It utilizes internal logic circuitry to enable the routing of the desired input signal to the output based on the control inputs. The enable input (E) controls the selection process, allowing the user to choose which input is active.

Detailed Application Field Plans

The DM74ALS251N finds application in various fields, including:

1. Data communication systems
2. Industrial automation
3. Test and measurement equipment
4. Audio/video processing
5. Computer peripherals
6. Control systems

Detailed and Complete Alternative Models

1. SN74ALS251N: Similar functionality and specifications, but available in a different package (SOIC).
2. CD74ALS251M: Equivalent logic multiplexer with slightly different pin configuration, available in a smaller SOIC package.
3. MC74ALS251D: Alternative IC with similar characteristics, but designed for surface mount applications (SOIC package).

These alternative models can be considered based on specific design requirements and preferences.

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