CD74HC688PWT

Product Overview

• Category: Integrated Circuit (IC)
• Use: Arithmetic Logic Unit (ALU)
• Characteristics: High-speed, CMOS technology
• Package: TSSOP-20
• Essence: 8-bit magnitude comparator
• Packaging/Quantity: Tape and Reel, 2500 units per reel

Specifications

• Supply Voltage Range: 2V to 6V
• Input Voltage Range: 0V to VCC
• Operating Temperature Range: -40°C to +85°C
• Propagation Delay: 9ns (typical)
• Output Current: ±25mA
• Quiescent Current: 4µA (maximum)

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. B0: Input B0
10. B1: Input B1
11. B2: Input B2
12. B3: Input B3
13. B4: Input B4
14. B5: Input B5
15. B6: Input B6
16. B7: Input B7
17. LT: Less Than Output
18. EQ: Equal Output
19. GT: Greater Than Output
20. GND: Ground
21. VCC: Supply Voltage

Functional Features

The CD74HC688PWT is an 8-bit magnitude comparator IC that compares two 8-bit binary numbers and provides three outputs indicating whether the first number is less than, equal to, or greater than the second number. It operates at high speed and utilizes CMOS technology, making it suitable for various applications.

Advantages and Disadvantages

Advantages: - High-speed operation - Wide supply voltage range - Low quiescent current - Compact TSSOP-20 package

Disadvantages: - Limited output current capacity - Sensitivity to electrostatic discharge (ESD)

Working Principles

The CD74HC688PWT compares the two 8-bit binary numbers by comparing each corresponding bit from both inputs. It uses a combination of logic gates and flip-flops to perform the comparison and generate the appropriate outputs indicating the relationship between the numbers.

Detailed Application Field Plans

The CD74HC688PWT is commonly used in digital systems where the comparison of two 8-bit numbers is required. Some specific application fields include:

1. Microcontrollers: Used in microcontroller-based systems for tasks such as data sorting, decision-making, and control algorithms.
2. Arithmetic Units: Integrated into arithmetic units to perform operations like addition, subtraction, and multiplication.
3. Data Processing: Employed in data processing systems for tasks like data validation, filtering, and pattern recognition.

Detailed and Complete Alternative Models

1. SN74HC688: Similar 8-bit magnitude comparator IC from Texas Instruments.
2. MC74HC688: Equivalent 8-bit magnitude comparator IC from ON Semiconductor.
3. 74HCT688: Alternative 8-bit magnitude comparator IC with TTL compatibility.

These alternative models offer similar functionality and can be used as replacements for the CD74HC688PWT depending on specific requirements.

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