MM74HC688WMX

Product Overview

• Category: Integrated Circuit (IC)
• Use: Digital Comparator
• Characteristics: High-Speed, CMOS Logic, 8-Bit Magnitude Comparator
• Package: SOIC (Small Outline Integrated Circuit)
• Essence: The MM74HC688WMX is a digital comparator IC that compares two 8-bit binary numbers and determines their relative magnitude.
• Packaging/Quantity: The MM74HC688WMX is available in a surface mount package and is typically sold in reels of 2500 units.

Specifications

• Supply Voltage: 2V to 6V
• Input Voltage: 0V to Vcc
• Operating Temperature: -40°C to +85°C
• Propagation Delay: 15ns (typical)
• Output Current: ±25mA
• Logic Family: HC (High-Speed CMOS)

Pin Configuration

The MM74HC688WMX has a total of 20 pins. Here is the detailed pin configuration:

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. LT: Less Than Output
19. EQ: Equal Output
20. GT: Greater Than Output

Functional Features

The MM74HC688WMX offers the following functional features:

• 8-bit magnitude comparison between two binary numbers.
• Outputs indicate whether the first number is less than, equal to, or greater than the second number.
• High-speed operation with a typical propagation delay of 15ns.
• CMOS logic ensures low power consumption and compatibility with a wide range of digital systems.

Advantages and Disadvantages

Advantages: - High-speed operation allows for quick comparison of binary numbers. - Low power consumption due to CMOS technology. - Wide operating voltage range (2V to 6V) provides flexibility in various applications.

Disadvantages: - Limited to 8-bit magnitude comparison, not suitable for larger numbers. - Requires external circuitry for handling carry/borrow operations in multi-bit comparisons.

Working Principles

The MM74HC688WMX works by comparing each corresponding bit of the two input binary numbers. It determines the relative magnitude by examining the bits from most significant to least significant. The outputs LT, EQ, and GT indicate whether the first number is less than, equal to, or greater than the second number, respectively.

Detailed Application Field Plans

The MM74HC688WMX can be used in various applications that require binary number comparison, such as:

1. Digital signal processing systems
2. Microcontrollers and microprocessors
3. Arithmetic and logic units
4. Data sorting and searching algorithms
5. Error detection and correction circuits

Detailed and Complete Alternative Models

Here are some alternative models that offer similar functionality to the MM74HC688WMX:

1. SN74LS688: 8-Bit Magnitude Comparator, TTL Logic Family
2. CD74HC688: High-Speed CMOS 8-Bit Magnitude Comparator
3. MC74HC688: 8-Bit Magnitude Comparator, Motorola HC Logic Family

These alternative models can be considered based on specific requirements and compatibility with existing systems.

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