CD74HC221E

Product Overview

• Category: Integrated Circuit
• Use: Digital Logic Gate
• Characteristics: High-Speed CMOS, Dual Monostable Multivibrator
• Package: 16-Pin DIP (Dual In-Line Package)
• Essence: The CD74HC221E is a dual monostable multivibrator integrated circuit that can be used in various digital logic applications.
• Packaging/Quantity: Available in tubes of 25 units or reels of 2,000 units.

Specifications

• Supply Voltage: 2V to 6V
• Propagation Delay: 9 ns (typical)
• Operating Temperature Range: -40°C to +85°C
• Output Current: ±5.2 mA
• Input Capacitance: 3.5 pF
• Power Dissipation: 500 mW

Pin Configuration

The CD74HC221E has a 16-pin DIP package with the following pin configuration:

__ __ Q1 |1 \__/ 16| Vcc Q2 |2 15| MR A1 |3 14| RCext B1 |4 13| Cext A2 |5 CD 12| Bext B2 |6 74HC 11| CLR GND |7 221 10| TR Q3 |8 9| Q4 ----------

Functional Features

• Dual monostable multivibrator with independent trigger and reset inputs.
• Capable of generating accurate time delays.
• Wide operating voltage range allows compatibility with various digital systems.
• High-speed operation enables efficient signal processing.
• Low power consumption.

Advantages and Disadvantages

Advantages: - Versatile functionality suitable for a wide range of applications. - Accurate time delay generation. - High-speed operation for efficient signal processing. - Low power consumption.

Disadvantages: - Limited number of monostable multivibrator outputs. - Requires external components for certain applications.

Working Principles

The CD74HC221E operates as a dual monostable multivibrator. It can be triggered by an external signal, which initiates a fixed time delay determined by the external resistor and capacitor connected to the RCext and Cext pins. The output remains high during this time delay and then returns to its original state. The device can also be reset using the MR (Master Reset) or CLR (Clear) inputs.

Detailed Application Field Plans

The CD74HC221E is commonly used in various digital systems and applications, including:

1. Timing circuits: The accurate time delay generation capability makes it suitable for timing applications such as clock synchronization and pulse shaping.
2. Data storage systems: Used in memory devices to control read and write operations.
3. Communication systems: Enables precise timing in data transmission and reception processes.
4. Industrial automation: Used in control systems for timing and synchronization purposes.
5. Robotics: Provides accurate timing signals for controlling robot movements and actions.

Detailed and Complete Alternative Models

1. SN74HC221N: Similar dual monostable multivibrator IC with identical pin configuration and specifications.
2. MC74HC221AN: Another alternative with comparable features and performance.
3. CD74HCT221E: A variant that operates at a lower voltage range (4.5V to 5.5V).

These alternative models offer similar functionality and can be used as replacements for the CD74HC221E in various applications.

In conclusion, the CD74HC221E is a versatile dual monostable multivibrator integrated circuit that provides accurate time delay generation and high-speed operation. Its wide range of applications includes timing circuits, data storage systems, communication systems, industrial automation, and robotics. While it has some limitations, there are alternative models available with similar features and performance.