CD74HC85PWE4

Product Overview

• Category: Integrated Circuit (IC)
• Use: Digital Comparator
• Characteristics: High-Speed, CMOS Logic, 4-Bit Magnitude Comparator
• Package: TSSOP-16
• Essence: The CD74HC85PWE4 is a digital comparator IC that compares two 4-bit binary numbers and determines their relative magnitudes.
• Packaging/Quantity: Each package contains one CD74HC85PWE4 IC.

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: 10 ns (typical)
• Number of Pins: 16

Detailed Pin Configuration

The CD74HC85PWE4 IC has the following pin configuration:

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

Functional Features

• Performs 4-bit magnitude comparison between two binary numbers.
• Outputs three signals indicating whether the first number is less than, equal to, or greater than the second number.
• Utilizes high-speed CMOS logic for fast operation.
• Wide operating voltage range allows compatibility with various systems.

Advantages and Disadvantages

Advantages

• High-speed operation enables quick comparison of binary numbers.
• CMOS logic ensures low power consumption.
• Wide supply voltage range provides flexibility in different applications.
• Compact TSSOP-16 package saves board space.

Disadvantages

• Limited to 4-bit magnitude comparison, not suitable for larger numbers.
• May require additional circuitry for cascading multiple comparators.

Working Principles

The CD74HC85PWE4 IC compares two 4-bit binary numbers by examining each corresponding bit. It determines the relative magnitudes of the numbers and generates three output signals: LT (Less Than), EQ (Equal), and GT (Greater Than). The LT signal is active when the first number is less than the second, EQ is active when both numbers are equal, and GT is active when the first number is greater than the second.

The internal circuitry of the CD74HC85PWE4 utilizes CMOS logic, which allows for high-speed operation and low power consumption. The IC operates within a wide supply voltage range of 2V to 6V, making it compatible with various digital systems.

Detailed Application Field Plans

The CD74HC85PWE4 IC finds applications in various fields where binary number comparison is required. Some potential application areas include:

1. Digital arithmetic circuits
2. Microcontrollers and microprocessors
3. Data processing systems
4. Communication systems
5. Industrial automation

Detailed and Complete Alternative Models

1. SN74HC85N: Similar 4-bit magnitude comparator IC from Texas Instruments.
2. MC14585B: 4-bit magnitude comparator IC from ON Semiconductor.
3. CD54HC85F3A: High-speed CMOS 4-bit magnitude comparator IC from Texas Instruments.

These alternative models offer similar functionality and can be used as replacements for the CD74HC85PWE4 in various applications.

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