M74HCT688RM13TR

Overview

Category: Integrated Circuit (IC)

Use: Digital Comparator

Characteristics: - High-speed operation - Low power consumption - Wide operating voltage range - Schmitt trigger inputs for noise immunity - Compatible with TTL levels - Available in surface mount package

Package: SO-20

Essence: The M74HCT688RM13TR is a digital comparator IC that compares two binary numbers and determines their relationship.

Packaging/Quantity: Each reel contains 2500 pieces.

Specifications

• Supply Voltage Range: 4.5V to 5.5V
• Input Voltage Range: 0V to VCC
• Operating Temperature Range: -40°C to +125°C
• Propagation Delay Time: 15 ns (typical)
• Output Current: ±6 mA

Detailed Pin Configuration

The M74HCT688RM13TR has a total of 20 pins, which are assigned as follows:

1. A0 - Input A, bit 0
2. A1 - Input A, bit 1
3. A2 - Input A, bit 2
4. A3 - Input A, bit 3
5. A4 - Input A, bit 4
6. A5 - Input A, bit 5
7. A6 - Input A, bit 6
8. A7 - Input A, bit 7
9. B0 - Input B, bit 0
10. B1 - Input B, bit 1
11. B2 - Input B, bit 2
12. B3 - Input B, bit 3
13. B4 - Input B, bit 4
14. B5 - Input B, bit 5
15. B6 - Input B, bit 6
16. B7 - Input B, bit 7
17. GND - Ground
18. Y - Output
19. VCC - Supply Voltage
20. NC - No Connection

Functional Features

• Compares two 8-bit binary numbers (A and B)
• Determines if A is greater than, equal to, or less than B
• Outputs a high signal on the Y pin when A > B
• Outputs a low signal on the Y pin when A = B
• Outputs a high signal on the Y pin when A < B

Advantages and Disadvantages

Advantages: - High-speed operation allows for quick comparison of binary numbers - Low power consumption makes it suitable for battery-powered devices - Wide operating voltage range provides flexibility in various applications - Schmitt trigger inputs ensure noise immunity, improving reliability - Compatibility with TTL levels enables easy integration with existing systems

Disadvantages: - Limited to comparing 8-bit binary numbers - May not be suitable for applications requiring higher precision or larger data sizes

Working Principles

The M74HCT688RM13TR works by comparing the corresponding bits of two 8-bit binary numbers, A and B. It determines their relationship by examining each bit from the most significant bit (MSB) to the least significant bit (LSB). The comparator outputs a high signal on the Y pin when A is greater than B, a low signal when A is equal to B, and a high signal when A is less than B.

Detailed Application Field Plans

The M74HCT688RM13TR is commonly used in various digital systems that require binary number comparison. Some application fields include:

1. Arithmetic Logic Units (ALUs)
2. Microcontrollers
3. Digital signal processing
4. Data encryption/decryption
5. Error detection and correction

Detailed and Complete Alternative Models

1. SN74HCT688N - 8-Bit Magnitude Comparator
2. CD74HCT688E - High-Speed CMOS Logic 8-Bit Magnitude Comparator
3. MC74HCT688AN - 8-Bit Magnitude Comparator with Latch

These alternative models offer similar functionality to the M74HCT688RM13TR and can be used as replacements in various applications.

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