74HC423D,653

Product Overview

• Category: Integrated Circuit (IC)
• Use: Digital Logic
• Characteristics: High-speed CMOS logic, Dual Retriggerable Monostable Multivibrator
• Package: SOIC-16
• Essence: A versatile IC that can be used in various digital applications requiring timing and control functions.
• Packaging/Quantity: Tape and Reel, 2500 units per reel

Specifications

• Supply Voltage Range: 2V to 6V
• Input Voltage Range: 0V to VCC
• Output Voltage Range: 0V to VCC
• Operating Temperature Range: -40°C to +125°C
• Propagation Delay Time: 20 ns (typical)
• Trigger Pulse Width: 10 ns (minimum)

Detailed Pin Configuration

The 74HC423D,653 IC has a total of 16 pins. The pin configuration is as follows:

1. MR (Master Reset)
2. TR (Trigger)
3. Qn (Output n)
4. GND (Ground)
5. Qn (Output n)
6. Qn (Output n)
7. Qn (Output n)
8. Qn (Output n)
9. VCC (Positive Power Supply)
10. Qn (Output n)
11. Qn (Output n)
12. Qn (Output n)
13. Qn (Output n)
14. Qn (Output n)
15. Qn (Output n)
16. Qn (Output n)

Functional Features

• Dual Retriggerable Monostable Multivibrator: Provides two independent monostable multivibrators in a single IC package.
• Retriggerable Operation: Each monostable multivibrator can be retriggered by applying a trigger pulse before the output pulse has ended.
• Adjustable Pulse Width: The duration of the output pulse can be adjusted using external resistors and capacitors.
• Schmitt Trigger Inputs: The trigger inputs have Schmitt trigger action, allowing for better noise immunity and hysteresis.

Advantages and Disadvantages

Advantages: - Versatility: Can be used in a wide range of digital applications requiring timing and control functions. - Retriggerable Operation: Provides flexibility in controlling the timing of output pulses. - High-Speed CMOS Logic: Offers fast operation and low power consumption.

Disadvantages: - Limited Output Current: The IC has a limited current sourcing and sinking capability, which may restrict its use in certain applications requiring higher current levels. - Sensitivity to Noise: Although the Schmitt trigger inputs provide some noise immunity, the IC may still be susceptible to noise interference in certain environments.

Working Principles

The 74HC423D,653 is based on the principle of a monostable multivibrator. When triggered, it generates a single output pulse with a duration determined by external resistors and capacitors. The retriggerable feature allows for the generation of subsequent pulses before the previous pulse has ended, providing flexibility in timing control.

Detailed Application Field Plans

The 74HC423D,653 can be used in various digital applications, including but not limited to:

1. Timing and Control Circuits: Used to generate precise timing signals for synchronization and control purposes.
2. Pulse Width Modulation (PWM): Employed in applications where adjustable pulse widths are required, such as motor speed control and LED dimming.
3. Frequency Division: Utilized in frequency division circuits to divide an input frequency by a specific factor.
4. Delay Generation: Used to introduce controlled delays in digital systems, enabling synchronization and sequencing of events.

Detailed and Complete Alternative Models

Some alternative models that offer similar functionality to the 74HC423D,653 IC include:

1. CD74HC123: Dual Retriggerable Monostable Multivibrator with Schmitt Trigger Inputs.
2. MC14538B: Dual Precision Retriggerable/Resettable Monostable Multivibrator.
3. SN74LS123: Dual Retriggerable Monostable Multivibrator with Clear.

These alternative models can be considered based on specific application requirements and availability.

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