Encyclopedia Entry: 74AHCT123APW,118

Product Information Overview

• Category: Integrated Circuit (IC)
• Use: Multivibrator
• Characteristics: High-speed operation, low power consumption
• Package: TSSOP (Thin Shrink Small Outline Package)
• Essence: Monostable Multivibrator
• Packaging/Quantity: Tape and Reel, 2500 units per reel

Specifications

• Supply Voltage: 2.0V to 5.5V
• Input Voltage: 0V to VCC
• Output Voltage: 0V to VCC
• Operating Temperature Range: -40°C to +125°C
• Propagation Delay Time: 10 ns (typical)
• Trigger Pulse Width: 23 ns (typical)

Detailed Pin Configuration

The 74AHCT123APW,118 IC has a total of 16 pins. The pin configuration is as follows:

1. Pin 1: Clear Input (CLR)
2. Pin 2: Trigger Input (TRIG)
3. Pin 3: Threshold Input (THRES)
4. Pin 4: Discharge Output (DISCH)
5. Pin 5: Ground (GND)
6. Pin 6: Output (OUT)
7. Pin 7: Output (OUT)
8. Pin 8: VCC
9. Pin 9: Output (OUT)
10. Pin 10: Output (OUT)
11. Pin 11: Discharge Output (DISCH)
12. Pin 12: Threshold Input (THRES)
13. Pin 13: Trigger Input (TRIG)
14. Pin 14: Clear Input (CLR)
15. Pin 15: Ground (GND)
16. Pin 16: VCC

Functional Features

The 74AHCT123APW,118 is a monostable multivibrator IC that generates a single pulse of a fixed duration when triggered. It operates at high speeds and consumes low power, making it suitable for various timing applications. The IC features a clear input (CLR) to reset the circuit, trigger input (TRIG) to initiate the pulse, and threshold input (THRES) to control the pulse width. It also provides multiple output pins (OUT) and discharge outputs (DISCH) for flexibility in connecting external components.

Advantages and Disadvantages

Advantages: - High-speed operation allows for precise timing applications. - Low power consumption makes it energy-efficient. - Multiple output pins provide versatility in circuit design. - Compact TSSOP package enables space-saving integration.

Disadvantages: - Limited pulse width range may not suit all applications. - Requires external components for complete functionality. - Sensitive to voltage fluctuations beyond specified limits.

Working Principles

The 74AHCT123APW,118 operates as a monostable multivibrator by utilizing an internal timing capacitor and resistors. When triggered, the circuit generates a single pulse with a duration determined by the values of the timing components connected to the threshold input (THRES). The pulse width can be adjusted by varying these external components. The discharge outputs (DISCH) discharge the timing capacitor after the pulse ends, preparing the circuit for the next trigger.

Detailed Application Field Plans

The 74AHCT123APW,118 finds applications in various fields where precise timing control is required. Some potential application areas include:

1. Timing circuits in digital systems
2. Pulse generation for communication protocols
3. Delay circuits in microcontrollers
4. Precision measurement equipment
5. Industrial automation systems
6. Robotics and motion control systems

Detailed and Complete Alternative Models

1. 74HC123: Similar functionality, but operates at a higher voltage range (2V to 6V).
2. CD74AC123: Offers improved noise immunity and faster propagation delay.
3. SN74LS123: Compatible with TTL logic levels, suitable for mixed logic systems.

These alternative models provide similar monostable multivibrator functionality with slight variations in voltage range, speed, and compatibility.

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