CD74AC280M

Product Overview

Category

CD74AC280M belongs to the category of integrated circuits (ICs).

Use

This IC is commonly used in digital systems for arithmetic operations and data processing.

Characteristics

• CD74AC280M is a 9-bit magnitude comparator.
• It operates on a supply voltage range of 2V to 6V.
• The IC has a low power consumption and high noise immunity.
• It offers fast propagation delay and high-speed operation.

Package

The CD74AC280M is available in a small outline integrated circuit (SOIC) package.

Essence

The essence of CD74AC280M lies in its ability to compare two 9-bit binary numbers and determine their relative magnitudes.

Packaging/Quantity

The CD74AC280M is typically packaged in reels or tubes, with quantities varying based on customer requirements.

Specifications

• Supply Voltage Range: 2V to 6V
• Operating Temperature Range: -40°C to +85°C
• Input Voltage High Level (VIH): 2V to VCC + 0.5V
• Input Voltage Low Level (VIL): -0.5V to 0.8V
• Output Voltage High Level (VOH): VCC - 0.5V
• Output Voltage Low Level (VOL): 0.4V
• Propagation Delay Time: 7ns (typical)

Detailed Pin Configuration

The CD74AC280M has a total of 16 pins, which are assigned specific functions as follows:

1. A0: Input pin for the least significant bit (LSB) of the first 9-bit number.
2. A1: Input pin for the second bit of the first 9-bit number.
3. A2: Input pin for the third bit of the first 9-bit number.
4. A3: Input pin for the fourth bit of the first 9-bit number.
5. A4: Input pin for the fifth bit of the first 9-bit number.
6. A5: Input pin for the sixth bit of the first 9-bit number.
7. A6: Input pin for the seventh bit of the first 9-bit number.
8. A7: Input pin for the eighth bit of the first 9-bit number.
9. A8: Input pin for the most significant bit (MSB) of the first 9-bit number.
10. B0: Input pin for the LSB of the second 9-bit number.
11. B1: Input pin for the second bit of the second 9-bit number.
12. B2: Input pin for the third bit of the second 9-bit number.
13. B3: Input pin for the fourth bit of the second 9-bit number.
14. B4: Input pin for the fifth bit of the second 9-bit number.
15. B5: Input pin for the sixth bit of the second 9-bit number.
16. B6: Input pin for the seventh bit of the second 9-bit number.

Functional Features

• CD74AC280M performs a magnitude comparison between two 9-bit binary numbers.
• It provides three output signals: EQ (Equal), GT (Greater Than), and LT (Less Than).
• The EQ signal is high when the two input numbers are equal.
• The GT signal is high when the first input number is greater than the second.
• The LT signal is high when the first input number is less than the second.

Advantages and Disadvantages

Advantages

• Fast propagation delay enables high-speed operation.
• Low power consumption ensures energy efficiency.
• High noise immunity enhances reliability.
• Compact SOIC package allows for space-saving integration.

Disadvantages

• Limited to comparing 9-bit binary numbers.
• Requires external circuitry for cascading multiple comparators.

Working Principles

CD74AC280M compares the two 9-bit binary numbers by examining each bit from the MSB to the LSB. It determines the relative magnitude of the numbers based on the logic levels at the input pins. The internal circuitry performs the necessary logical operations to generate the EQ, GT, and LT output signals.

Detailed Application Field Plans

CD74AC280M finds applications in various digital systems where magnitude comparison is required. Some potential application fields include:

1. Arithmetic units in microprocessors and microcontrollers.
2. Data sorting and searching algorithms.
3. Digital signal processing circuits.
4. Error detection and correction mechanisms.
5. Control systems for industrial automation.

Detailed and Complete Alternative Models

1. CD74AC280E: Similar to CD74AC280M but available in a different package (PDIP).
2. SN74LS85: 4-bit magnitude comparator with similar functionality.
3. CD