CD74HC688PWR

Product Overview

• Category: Integrated Circuit
• Use: Digital Comparator
• Characteristics: High-Speed, CMOS Logic, 8-Bit Magnitude Comparator
• Package: TSSOP (Thin Shrink Small Outline Package)
• Essence: The CD74HC688PWR is a high-speed CMOS logic integrated circuit that functions as an 8-bit magnitude comparator. It is commonly used in digital systems for comparing two binary numbers and determining their relative magnitudes.
• Packaging/Quantity: The CD74HC688PWR is available in tape and reel packaging, with 2500 units per reel.

Specifications

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

Pin Configuration

The CD74HC688PWR has a total of 20 pins, which are assigned specific functions 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. LT: Less Than Output
19. EQ: Equal Output
20. GT: Greater Than Output

Functional Features

The CD74HC688PWR offers the following functional features:

• High-speed operation, making it suitable for use in time-critical applications.
• CMOS logic technology ensures low power consumption and compatibility with a wide range of digital systems.
• 8-bit magnitude comparison capability allows for comparing two binary numbers efficiently.
• Three output pins (LT, EQ, GT) indicate the relative magnitudes of the compared numbers.

Advantages and Disadvantages

Advantages: - High-speed operation enables quick comparison of binary numbers. - Low power consumption due to CMOS technology. - Compact TSSOP package allows for space-efficient integration into electronic systems. - Wide operating voltage range provides flexibility in various applications.

Disadvantages: - Limited to 8-bit magnitude comparison, not suitable for larger bit sizes. - Propagation delay may introduce timing issues in certain high-frequency applications.

Working Principles

The CD74HC688PWR works by comparing the corresponding bits of two input binary numbers (A and B). It determines whether A is less than, equal to, or greater than B based on the relative values of their bits. The result is indicated by the outputs LT (Less Than), EQ (Equal), and GT (Greater Than).

The internal circuitry of the CD74HC688PWR performs the necessary logical operations to compare the bits and generate the appropriate output signals. The propagation delay specifies the time taken for the comparison result to stabilize after the inputs change.

Detailed Application Field Plans

The CD74HC688PWR is commonly used in various digital systems and applications, including:

1. Arithmetic Logic Units (ALUs)
2. Microprocessors
3. Digital Signal Processors (DSPs)
4. Data processing and sorting systems
5. Binary number comparison circuits

Its high-speed operation, low power consumption, and compact package make it suitable for integration into these systems, where efficient binary number comparison is required.

Detailed and Complete Alternative Models

1. SN74HC688N: Similar 8-bit magnitude comparator IC from Texas Instruments.
2. MC74HC688: Another alternative from ON Semiconductor with comparable specifications.
3. 74HCT688: A CMOS logic integrated circuit from NXP Semiconductors that offers similar functionality.

These alternative models provide similar functionality to the CD74HC688PWR and can be considered as replacements based on specific requirements and availability.

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