SN74ALS280N

Product Overview

• Category: Integrated Circuit (IC)
• Use: Arithmetic Logic Unit (ALU)
• Characteristics: High-speed, low-power consumption
• Package: DIP-14 (Dual In-line Package with 14 pins)
• Essence: The SN74ALS280N is a 9-bit magnitude comparator that performs arithmetic and logical operations.
• Packaging/Quantity: Available in tubes or reels, quantity varies depending on the supplier.

Specifications

• Supply Voltage: 4.75V to 5.25V
• Operating Temperature: -40°C to +85°C
• Propagation Delay: 10ns (typical)
• Input Current: ±0.1μA (maximum)
• Output Current: ±8mA (maximum)

Detailed Pin Configuration

The SN74ALS280N has a total of 14 pins:

1. A0: Input A, bit 0
2. A1: Input A, bit 1
3. A2: Input A, bit 2
4. B0: Input B, bit 0
5. B1: Input B, bit 1
6. B2: Input B, bit 2
7. GND: Ground
8. LT: Less Than output
9. EQ: Equal output
10. GT: Greater Than output
11. VCC: Power supply voltage
12. A3: Input A, bit 3
13. B3: Input B, bit 3
14. NC: No Connection

Functional Features

• Performs 9-bit magnitude comparison between two inputs (A and B).
• Outputs three signals indicating the relationship between A and B: LT (Less Than), EQ (Equal), and GT (Greater Than).
• High-speed operation allows for quick comparison and decision-making.
• Low-power consumption makes it suitable for battery-powered devices.

Advantages and Disadvantages

Advantages: - High-speed operation enables efficient arithmetic and logical operations. - Low-power consumption prolongs battery life in portable devices. - Compact DIP-14 package allows for easy integration into various circuit designs.

Disadvantages: - Limited to 9-bit magnitude comparison, not suitable for larger data sets. - Requires external components for more complex operations. - May be less cost-effective compared to alternative models for certain applications.

Working Principles

The SN74ALS280N compares the binary values of two 9-bit inputs (A and B) using a combination of logic gates. It determines whether A is less than, equal to, or greater than B and provides corresponding outputs (LT, EQ, GT). The internal circuitry consists of multiple stages that perform bit-wise comparison and generate the appropriate output signals based on the input values.

Detailed Application Field Plans

The SN74ALS280N is commonly used in various applications that require arithmetic and logical operations, such as:

1. Microcontrollers and microprocessors
2. Digital signal processing
3. Data sorting and searching algorithms
4. Calculator circuits
5. Industrial automation systems

Detailed and Complete Alternative Models

1. SN74LS85: 4-bit magnitude comparator with similar functionality but lower speed.
2. SN74HC688: 8-bit magnitude comparator with higher speed and wider operating temperature range.
3. CD4510: BCD up/down counter with built-in magnitude comparison capability.

These alternative models offer different features and specifications, allowing users to choose the most suitable option based on their specific requirements.

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