CD74HCT21M

Product Overview

• Category: Integrated Circuit
• Use: Logic Gates
• Characteristics: High-Speed CMOS, Dual 4-Input AND Gate
• Package: SOIC-14
• Essence: The CD74HCT21M is a high-speed CMOS integrated circuit that contains two independent 4-input AND gates. It operates at a voltage range of 2V to 6V and provides improved noise immunity.
• Packaging/Quantity: The CD74HCT21M is available in a standard SOIC-14 package and is typically sold in reels of 2500 units.

Specifications

• Supply Voltage Range: 2V to 6V
• Logic Family: HCT
• Number of Inputs: 4 per gate
• Number of Gates: 2
• Propagation Delay: 9 ns (typical)
• Operating Temperature Range: -40°C to +85°C

Detailed Pin Configuration

The CD74HCT21M has a total of 14 pins arranged as follows:

+---+--+---+ A1 --|1 +--+ 14|-- VCC B1 --|2 13|-- A2 C1 --|3 12|-- B2 D1 --|4 CD74HCT21M 11|-- C2 GND --|5 10|-- D2 D --|6 9|-- D C --|7 8|-- C +----------+

Functional Features

• Dual 4-input AND gates allow for complex logic operations.
• High-speed CMOS technology enables fast switching times.
• Improved noise immunity ensures reliable operation in noisy environments.
• Wide supply voltage range allows for compatibility with various systems.
• Low power consumption makes it suitable for battery-powered devices.

Advantages and Disadvantages

Advantages: - High-speed operation - Improved noise immunity - Wide supply voltage range - Low power consumption

Disadvantages: - Limited number of gates per package - Not suitable for high-voltage applications

Working Principles

The CD74HCT21M is based on high-speed CMOS technology, which combines the advantages of both CMOS and TTL logic families. It utilizes a combination of MOSFETs and bipolar transistors to achieve high-speed switching while maintaining compatibility with TTL logic levels.

The 4-input AND gates within the CD74HCT21M perform logical AND operations on their respective inputs. The outputs are determined by the logical combination of the inputs according to the truth table of an AND gate.

Detailed Application Field Plans

The CD74HCT21M can be used in various applications that require logical AND operations. Some potential application fields include:

1. Digital signal processing
2. Data communication systems
3. Industrial automation
4. Robotics
5. Automotive electronics

Detailed and Complete Alternative Models

Here are some alternative models that offer similar functionality to the CD74HCT21M:

1. SN74HCT21 - Texas Instruments
2. MC74HCT21 - ON Semiconductor
3. 74HCT21 - NXP Semiconductors
4. CD54HCT21 - Texas Instruments

These alternatives provide similar characteristics and can be used as drop-in replacements for the CD74HCT21M in most applications.

In conclusion, the CD74HCT21M is a high-speed CMOS integrated circuit that contains two independent 4-input AND gates. It offers improved noise immunity, wide supply voltage range, and low power consumption. With its various applications and alternative models, the CD74HCT21M is a versatile logic gate suitable for many electronic systems.