Texas Instruments
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SN74AHC123APWR
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SN74AHC123APWR

Product Overview

  • Category: Integrated Circuit (IC)
  • Use: Multivibrator
  • Characteristics: High-speed, low-power, monostable multivibrator
  • Package: TSSOP (Thin Shrink Small Outline Package)
  • Essence: A versatile IC used for generating precise time delays in electronic circuits
  • Packaging/Quantity: Tape and reel packaging, 2500 units per reel

Specifications

  • Supply Voltage Range: 2 V to 5.5 V
  • Operating Temperature Range: -40°C to +85°C
  • Propagation Delay Time: 8 ns (typical)
  • Output Current: ±8 mA
  • Trigger Pulse Width Range: 23 ns to 1000 ns

Detailed Pin Configuration

The SN74AHC123APWR has a total of 16 pins, which are labeled as follows:

  1. CLR (Clear)
  2. A (Input A)
  3. B (Input B)
  4. RCext (External Resistor/Capacitor)
  5. GND (Ground)
  6. Q (Output Q)
  7. Q̅ (Complementary Output Q̅)

  8. VCC (Supply Voltage)

  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

  • Monostable Operation: The SN74AHC123APWR can be configured as a monostable multivibrator, producing a single output pulse of a specific duration.
  • Precise Time Delays: It generates accurate time delays based on the external resistor and capacitor values connected to the RCext pin.
  • Wide Supply Voltage Range: The IC can operate within a wide range of supply voltages, making it suitable for various applications.
  • High-Speed Operation: With a typical propagation delay time of 8 ns, it ensures fast and efficient signal processing.

Advantages and Disadvantages

Advantages: - Versatile functionality - Precise time delay generation - Low power consumption - Compact TSSOP package - Wide operating temperature range

Disadvantages: - Limited output current capacity - Requires external resistor and capacitor for operation

Working Principles

The SN74AHC123APWR operates as a monostable multivibrator. When a trigger pulse is applied to the A input, the Q output transitions from low to high state for a specific duration determined by the values of the external resistor and capacitor connected to the RCext pin. The Q̅ output remains in the complementary state during this time. After the specified delay, the Q output returns to its original low state.

Detailed Application Field Plans

The SN74AHC123APWR finds applications in various fields, including:

  1. Timing Circuits: It is commonly used in electronic circuits that require precise time delays, such as timers, pulse generators, and frequency dividers.
  2. Communication Systems: The IC can be utilized in communication systems for synchronization purposes, ensuring accurate timing between different components.
  3. Industrial Automation: It plays a crucial role in industrial automation systems, enabling precise control of processes and synchronization of operations.
  4. Automotive Electronics: The IC finds application in automotive electronics for functions like engine control, lighting control, and sensor interfacing, where accurate timing is essential.

Detailed and Complete Alternative Models

  1. CD74HC123E: Similar monostable multivibrator IC with DIP (Dual Inline Package) packaging.
  2. MC74VHC123ADR2G: Monostable multivibrator IC with extended temperature range and SOIC (Small Outline Integrated Circuit) packaging.
  3. SN74LVC123APW: Monostable multivibrator IC with lower voltage operation and TSSOP packaging.

These alternative models offer similar functionality to the SN74AHC123APWR, providing options based on specific requirements and preferences.

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Énumérez 10 questions et réponses courantes liées à l'application de SN74AHC123APWR dans les solutions techniques

Sure! Here are 10 common questions and answers related to the application of SN74AHC123APWR:

  1. Q: What is SN74AHC123APWR? A: SN74AHC123APWR is a dual retriggerable monostable multivibrator IC, commonly used in timing and control applications.

  2. Q: What is the operating voltage range for SN74AHC123APWR? A: The operating voltage range for SN74AHC123APWR is typically between 2V and 5.5V.

  3. Q: What is the maximum output current of SN74AHC123APWR? A: The maximum output current of SN74AHC123APWR is typically around 8mA.

  4. Q: Can SN74AHC123APWR be used as a frequency divider? A: No, SN74AHC123APWR is not designed to function as a frequency divider. It is primarily used for generating precise time delays.

  5. Q: How many trigger inputs does SN74AHC123APWR have? A: SN74AHC123APWR has two independent trigger inputs, labeled as A and B.

  6. Q: What is the typical propagation delay of SN74AHC123APWR? A: The typical propagation delay of SN74AHC123APWR is around 9 ns.

  7. Q: Can SN74AHC123APWR operate in both monostable and astable modes? A: Yes, SN74AHC123APWR can operate in both monostable (one-shot) and astable (free-running) modes, depending on the configuration.

  8. Q: What is the maximum power dissipation of SN74AHC123APWR? A: The maximum power dissipation of SN74AHC123APWR is typically around 500mW.

  9. Q: Can SN74AHC123APWR be used in high-speed applications? A: Yes, SN74AHC123APWR is designed for high-speed operation and can be used in various high-frequency applications.

  10. Q: What are some typical applications of SN74AHC123APWR? A: Some typical applications of SN74AHC123APWR include pulse shaping, time delay generation, frequency division, precision timing control, and synchronization circuits.

Please note that the answers provided here are general and may vary depending on specific datasheet specifications and application requirements.