SN74AHC123ADGVR

Product Overview

• Category: Integrated Circuit (IC)
• Use: Multivibrator
• Characteristics: High-speed, low-power, monostable multivibrator
• Package: VSSOP (Very Small Outline Package)
• Essence: Flip-flop with retriggerable/resettable capability
• Packaging/Quantity: Tape and reel packaging, 2500 units per reel

Specifications

• Supply Voltage Range: 2V to 5.5V
• Operating Temperature Range: -40°C to +85°C
• Propagation Delay Time: 7 ns (typical)
• Output Current: ±8 mA
• Input Capacitance: 3.5 pF (typical)

Detailed Pin Configuration

The SN74AHC123ADGVR has a total of 16 pins. The pin configuration is as follows:

1. CLR (Clear) - Active LOW input for resetting the flip-flop
2. A (Trigger) - Input for triggering the flip-flop
3. B (Threshold) - Input for setting the threshold voltage
4. RCext (External Resistor-Capacitor) - External resistor-capacitor timing components connection
5. GND (Ground) - Ground reference
6. Q (Output) - Output of the flip-flop
7. Q̅ (Complementary Output) - Complementary output of the flip-flop
8. VCC (Supply Voltage) - Positive supply voltage

Functional Features

• Retriggerable/Resettable: The flip-flop can be reset or retriggered using the CLR input.
• Monostable Operation: The IC functions as a monostable multivibrator, producing a pulse of fixed duration upon trigger input.
• High-Speed Operation: The SN74AHC123ADGVR operates at high speeds, making it suitable for time-critical applications.
• Low Power Consumption: The IC is designed to consume low power, making it energy-efficient.

Advantages and Disadvantages

Advantages: - Retriggerable/Resettable capability provides flexibility in timing applications. - High-speed operation allows for precise timing control. - Low power consumption makes it suitable for battery-powered devices.

Disadvantages: - Limited output current may restrict its use in certain applications requiring higher current levels. - Input capacitance may affect the performance in high-frequency applications.

Working Principles

The SN74AHC123ADGVR is based on a flip-flop circuit with retriggerable/resettable functionality. Upon receiving a trigger input (A), the flip-flop changes state and produces an output pulse. The duration of the pulse is determined by the external resistor-capacitor (RCext) timing components connected to pin 4. The flip-flop can be reset using the CLR input (pin 1) or retriggered before the completion of the pulse. This allows for precise control over the timing of the output pulse.

Detailed Application Field Plans

The SN74AHC123ADGVR finds applications in various fields, including:

1. Timing Circuits: The retriggerable/resettable feature makes it suitable for generating precise timing signals in applications such as clocks, timers, and frequency dividers.
2. Pulse Generation: The monostable operation enables the IC to generate fixed-duration pulses used in applications like pulse-width modulation (PWM), pulse position modulation (PPM), and pulse shaping.
3. Control Systems: The IC can be used in control systems where accurate timing is crucial, such as motor control, robotics, and industrial automation.
4. Communication Systems: It can be employed in communication systems for generating synchronization signals, data encoding/decoding, and signal conditioning.

Detailed and Complete Alternative Models

1. CD74HC123E: Similar monostable multivibrator IC with retriggerable/resettable capability. Package: PDIP (Plastic Dual-In-Line Package).
2. MC74VHC123A: High-speed CMOS monostable multivibrator IC with retriggerable/resettable feature. Package: SOIC (Small Outline Integrated Circuit).
3. SN74LVC123ADGVR: Low-voltage CMOS monostable multivibrator IC with retriggerable/resettable functionality. Package: VSSOP.

These alternative models offer similar functionalities to the SN74AHC123ADGVR and can be considered as substitutes based on specific requirements.

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