Encyclopedia Entry: 74VHC221ASJ

Product Overview

Category

The 74VHC221ASJ belongs to the category of integrated circuits (ICs), specifically digital logic gates.

Use

This IC is commonly used in various electronic devices and systems for performing logical operations, such as signal processing, data manipulation, and control functions.

Characteristics

• High-speed operation: The 74VHC221ASJ is designed to operate at high speeds, making it suitable for applications that require quick response times.
• Low power consumption: This IC is optimized for low power consumption, making it energy-efficient.
• Wide operating voltage range: It can operate within a wide voltage range, typically between 2V and 5.5V.
• Compatibility: The 74VHC221ASJ is compatible with both TTL and CMOS logic levels, allowing for easy integration into existing systems.

Package and Quantity

The 74VHC221ASJ is available in a small outline integrated circuit (SOIC) package. It is typically sold in reels or tubes containing multiple units, with quantities varying depending on the supplier.

Specifications

• Supply Voltage Range: 2V to 5.5V
• Logic Family: VHC
• Number of Inputs: 2
• Number of Outputs: 1
• Propagation Delay: <10 ns
• Operating Temperature Range: -40°C to +85°C

Pin Configuration

The 74VHC221ASJ has a dual-inline package (DIP) with 16 pins. The pin configuration is as follows:

```

---

| | --|1 16|-- VCC --|2 15|-- Input A --|3 14|-- Output --|4 13|-- GND --|5 12|-- Input B --|6 11|-- Clear --|7 10|-- Clock --|8 9|-- Set |___________| ```

Functional Features

• Dual D flip-flop: The 74VHC221ASJ consists of two independent D-type flip-flops, allowing for the storage and transfer of binary data.
• Edge-triggered operation: The flip-flops are triggered by the rising edge of the clock signal, ensuring precise timing control.
• Asynchronous clear and set inputs: The clear and set inputs allow for immediate resetting or setting of the flip-flop outputs, regardless of the clock signal.

Advantages

• High-speed operation enables efficient data processing.
• Low power consumption contributes to energy efficiency.
• Wide operating voltage range allows for compatibility with various systems.
• Compact SOIC package facilitates space-saving designs.

Disadvantages

• Limited number of inputs and outputs may restrict complex circuit designs.
• Sensitivity to noise and voltage fluctuations may require additional measures for reliable operation.

Working Principles

The 74VHC221ASJ operates based on the principles of digital logic. It utilizes flip-flops to store and manipulate binary data. The clock signal triggers the flip-flops, causing them to update their output states based on the input values. The clear and set inputs provide additional control over the flip-flop outputs.

Application Field Plans

The 74VHC221ASJ finds applications in various fields, including: 1. Communication systems: Used for signal processing and data transmission. 2. Industrial automation: Employed in control circuits for machinery and equipment. 3. Consumer electronics: Integrated into devices such as smartphones, tablets, and gaming consoles. 4. Automotive electronics: Utilized in vehicle control systems and infotainment systems. 5. Medical devices: Incorporated into medical equipment for data processing and control functions.

Alternative Models

For those seeking alternative options, the following ICs can be considered: - 74HC221: Similar functionality but operates at a lower voltage range (2V to 6V). - CD4013: Dual D flip-flop with additional features like Schmitt trigger inputs. - SN74LS74A: TTL logic family flip-flop with comparable characteristics.

In conclusion, the 74VHC221ASJ is a high-speed, low-power digital logic gate IC that finds applications in various electronic systems. Its compact package, wide operating voltage range, and compatibility make it a versatile choice for designers and engineers.

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