CD74HC85PWTE4

Product Overview

• Category: Integrated Circuit
• Use: Digital Comparator
• Characteristics: High-Speed, CMOS Logic, 4-Bit Magnitude Comparator
• Package: TSSOP (Thin Shrink Small Outline Package)
• Essence: Performs comparison of two 4-bit binary numbers
• 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: 9 ns (typical)
• Output Current: ±6 mA
• Quiescent Current: 4 μA (maximum)

Detailed Pin Configuration

The CD74HC85PWTE4 has a total of 16 pins. The pin configuration is as follows:

1. A3 (Input)
2. B3 (Input)
3. A2 (Input)
4. B2 (Input)
5. A1 (Input)
6. B1 (Input)
7. A0 (Input)
8. B0 (Input)
9. GND (Ground)
10. LT (Output)
11. EQ (Output)
12. GT (Output)
13. P (Output)
14. CARRY (Output)
15. VCC (Supply Voltage)
16. NC (No Connection)

Functional Features

• Performs 4-bit magnitude comparison between two binary numbers
• Outputs indicate whether the numbers are equal, less than, or greater than each other
• Fast propagation delay ensures quick response time
• Low quiescent current minimizes power consumption
• Wide supply voltage range allows for versatile applications

Advantages and Disadvantages

Advantages: - High-speed operation enables efficient processing of digital signals - CMOS logic ensures low power consumption - Wide supply voltage range enhances flexibility in various applications

Disadvantages: - Limited to 4-bit magnitude comparison, not suitable for larger numbers - Propagation delay may affect real-time applications with strict timing requirements

Working Principles

The CD74HC85PWTE4 is a digital comparator that compares two 4-bit binary numbers. It utilizes CMOS logic technology, which allows for high-speed operation and low power consumption. The inputs (A3-A0 and B3-B0) represent the binary numbers to be compared. The outputs (LT, EQ, GT, P, CARRY) indicate the result of the comparison.

The LT (Less Than), EQ (Equal), and GT (Greater Than) outputs determine the relationship between the two input numbers. The P (Parallel) output provides the logical OR of all the comparison results. The CARRY output indicates if there is a carry-out from the most significant bit during subtraction.

Detailed Application Field Plans

The CD74HC85PWTE4 finds application in various fields where digital magnitude comparison is required. Some potential application areas include:

1. Arithmetic Logic Units (ALUs) in microprocessors
2. Digital signal processing circuits
3. Data sorting and filtering systems
4. Error detection and correction circuits
5. Control systems for industrial automation

Detailed and Complete Alternative Models

1. SN74HC85 - Similar 4-bit magnitude comparator by Texas Instruments
2. MC74HC85 - 4-bit magnitude comparator by ON Semiconductor
3. CD54HC85 - High-speed CMOS 4-bit magnitude comparator by Texas Instruments
4. 74HCT85 - 4-bit magnitude comparator with TTL compatibility by NXP Semiconductors

These alternative models offer similar functionality and can be used as substitutes for the CD74HC85PWTE4 depending on specific requirements.

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