SN74AHC123ADRG4

Product Overview

• Category: Integrated Circuit
• Use: Multivibrator and Monostable Multivibrator
• Characteristics: High-speed, low-power, and compatible with CMOS logic levels
• Package: SOIC (Small Outline Integrated Circuit)
• Essence: Dual retriggerable monostable multivibrator
• Packaging/Quantity: Tape and Reel, 2500 pieces per reel

Specifications

• Supply Voltage Range: 2 V to 5.5 V
• Propagation Delay Time: 6 ns
• Trigger Pulse Width Range: 23 ns to 1000 ns
• Operating Temperature Range: -40°C to +85°C
• Input Current: ±20 mA
• Output Current: ±25 mA

Detailed Pin Configuration

The SN74AHC123ADRG4 has a total of 16 pins. The pin configuration is as follows:

1. CLR (Clear) - Active LOW clear input
2. A - First trigger input
3. B - Second trigger input
4. RCext (External resistor-capacitor timing components)
5. GND (Ground)
6. Q - Output
7. VCC (Positive power supply)
8. NC (No Connection)
9. NC (No Connection)
10. NC (No Connection)
11. NC (No Connection)
12. NC (No Connection)
13. NC (No Connection)
14. NC (No Connection)
15. NC (No Connection)
16. NC (No Connection)

Functional Features

• Retriggerable operation allows extended pulse width
• Schmitt-trigger inputs for noise immunity
• Low power consumption
• High-speed operation
• Wide operating voltage range

Advantages and Disadvantages

Advantages: - Retriggerable operation provides flexibility in generating variable pulse widths - Schmitt-trigger inputs ensure reliable operation in noisy environments - Low power consumption makes it suitable for battery-powered applications - High-speed operation enables quick response times

Disadvantages: - Limited number of trigger inputs (only two) - Not suitable for applications requiring very long pulse widths

Working Principles

The SN74AHC123ADRG4 is a dual retriggerable monostable multivibrator. It generates a single output pulse of a specified width when triggered by an external signal. The pulse width can be adjusted using external resistor-capacitor timing components connected to the RCext pin.

When a trigger signal is applied to either the A or B input, the output Q goes HIGH and remains HIGH for the duration determined by the timing components. If another trigger signal is received during this period, the output pulse width is extended. The CLR input can be used to force the output Q LOW and terminate the pulse prematurely.

Detailed Application Field Plans

The SN74AHC123ADRG4 is commonly used in various applications, including:

1. Timing circuits: It is widely used in applications that require precise timing, such as clock synchronization, time delay generation, and frequency division.
2. Pulse shaping: The retriggerable feature allows the generation of well-defined pulses with adjustable widths, making it suitable for applications like pulse-width modulation and waveform generation.
3. Control systems: It finds application in control systems where accurate timing is crucial, such as motor control, robotics, and industrial automation.
4. Communication systems: The high-speed operation and noise immunity make it suitable for use in communication systems, including data transmission and reception.

Detailed and Complete Alternative Models

1. CD74HC123E - Dual retriggerable monostable multivibrator with similar specifications and package type.
2. MC74VHC123ADR2G - Dual retriggerable monostable multivibrator with extended temperature range and different package type.
3. SN74LVC123ADGVR - Dual retriggerable monostable multivibrator with lower voltage operation and smaller package size.

These alternative models offer similar functionality and can be considered as substitutes for the SN74AHC123ADRG4 in various applications.

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