Encyclopedia Entry: 74VHC123ASJ

Product Overview

Category

The 74VHC123ASJ belongs to the category of integrated circuits (ICs) and specifically falls under the family of VHC logic devices.

Use

This IC is commonly used in digital electronics for various applications such as signal timing, pulse generation, and frequency division.

Characteristics

• High-speed operation: The 74VHC123ASJ is designed to operate at high speeds, making it suitable for time-critical applications.
• Low power consumption: This IC consumes minimal power, making it energy-efficient.
• Wide operating voltage range: It can operate within a wide voltage range, typically between 2V and 5.5V.
• Schmitt-trigger inputs: The device features Schmitt-trigger inputs, which provide hysteresis and improve noise immunity.

Package

The 74VHC123ASJ is available in a small outline integrated circuit (SOIC) package. This package offers compactness and ease of integration into electronic circuits.

Essence

The essence of the 74VHC123ASJ lies in its ability to provide precise timing control and reliable pulse generation in digital systems.

Packaging/Quantity

The IC is typically sold in reels or tubes, with each reel/tube containing a specific quantity of units. The exact packaging and quantity may vary depending on the supplier.

Specifications

• Supply Voltage Range: 2V to 5.5V
• Input Voltage Range: 0V to VCC
• Output Voltage Range: 0V to VCC
• Operating Temperature Range: -40°C to +85°C
• Logic Family: VHC
• Number of Pins: 16
• Pin Configuration: [Detailed pin configuration provided below]

Detailed Pin Configuration

1. Clear (CLR)
2. A Input
3. B Input
4. C Input
5. D Input
6. Clock (CLK) Input
7. Output (Q)
8. Output (Q̅)
9. Ground (GND)
10. Output (Q̅)
11. Output (Q)
12. Clock (CLK) Input
13. D Input
14. C Input
15. B Input
16. A Input

Functional Features

• Monostable Multivibrator: The 74VHC123ASJ can function as a monostable multivibrator, generating a single output pulse of a specific duration in response to an input trigger.
• Retriggerable Operation: It supports retriggerable operation, allowing the generation of multiple pulses without the need for external circuitry.
• Adjustable Pulse Width: The width of the output pulse can be adjusted using external resistors and capacitors connected to the IC.

Advantages and Disadvantages

Advantages

• High-speed operation enables precise timing control.
• Low power consumption makes it energy-efficient.
• Wide operating voltage range allows compatibility with various systems.
• Schmitt-trigger inputs enhance noise immunity.

Disadvantages

• Limited functionality: The 74VHC123ASJ is primarily designed for pulse generation and timing applications, limiting its use in other areas.
• Not suitable for high-power applications: Due to its low power capabilities, this IC may not be suitable for applications requiring high power handling.

Working Principles

The 74VHC123ASJ operates based on the principles of digital logic circuits. It utilizes internal flip-flops and gates to generate precise output pulses based on the input clock signal and control inputs. The monostable multivibrator functionality is achieved through the interaction of these internal components.

Detailed Application Field Plans

The 74VHC123ASJ finds applications in various fields, including: 1. Timing circuits in microcontrollers and microprocessors. 2. Frequency division in communication systems. 3. Pulse generation for digital signal processing. 4. Control circuitry in industrial automation. 5. Timer circuits in consumer electronics.

Detailed and Complete Alternative Models

1. 74HC123: This is a similar IC from the HC logic family, offering comparable functionality to the 74VHC123ASJ.
2. CD74AC123: An alternative IC from the AC logic family, providing similar features and performance.
3. SN74LS123: This IC from the LS logic family can be used as an alternative, although it operates at lower speeds compared to the VHC family.

These alternative models offer similar functionality and can be considered based on specific requirements and availability.

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