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SN74LS123DG4
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SN74LS123DG4

Product Overview

Category

SN74LS123DG4 belongs to the category of integrated circuits (ICs).

Use

This product is commonly used in digital electronics and communication systems.

Characteristics

  • High-speed operation
  • Low power consumption
  • Wide operating voltage range
  • Schmitt-trigger inputs for noise immunity
  • Monostable multivibrator functionality

Package

SN74LS123DG4 is available in a dual in-line package (DIP) with 16 pins.

Essence

The essence of SN74LS123DG4 lies in its ability to generate precise time delays or monostable pulses.

Packaging/Quantity

SN74LS123DG4 is typically packaged in reels or tubes, with a quantity of 250 units per reel/tube.

Specifications

  • Supply Voltage: 4.75V to 5.25V
  • Operating Temperature Range: -40°C to +85°C
  • Output Current: ±8mA
  • Propagation Delay Time: 22ns (typical)
  • Trigger Pulse Width Range: 30ns to 1000ns

Detailed Pin Configuration

  1. CLR (Clear)
  2. A (Trigger Input)
  3. B (Trigger Input)
  4. GND (Ground)
  5. RC (Resistor-Capacitor)
  6. Q (Output)
  7. VCC (Supply Voltage)
  8. Q' (Complementary Output)
  9. D (Data Input)
  10. REXT (External Resistor)
  11. CEXT (External Capacitor)
  12. NC (No Connection)
  13. NC (No Connection)
  14. NC (No Connection)
  15. NC (No Connection)
  16. NC (No Connection)

Functional Features

  • Monostable Multivibrator: Generates a single pulse of fixed duration upon receiving a trigger input.
  • Schmitt-trigger Inputs: Provides noise immunity by ensuring a clean and stable input signal.
  • Wide Operating Voltage Range: Allows compatibility with various power supply voltages.
  • High-Speed Operation: Enables rapid signal processing.

Advantages

  • Precise Time Delay Generation: SN74LS123DG4 ensures accurate timing in digital circuits.
  • Low Power Consumption: Helps conserve energy in electronic systems.
  • Noise Immunity: The Schmitt-trigger inputs minimize the impact of external disturbances.
  • Versatile Application: Suitable for a wide range of digital electronics and communication systems.

Disadvantages

  • Limited Trigger Pulse Width Range: The minimum and maximum trigger pulse widths are restricted to 30ns and 1000ns, respectively.
  • DIP Package Size: The dual in-line package may not be suitable for space-constrained applications.

Working Principles

SN74LS123DG4 operates as a monostable multivibrator. When a trigger input is received, the output generates a single pulse with a fixed duration determined by the external resistor (REXT) and capacitor (CEXT). The pulse width can be adjusted by varying the values of REXT and CEXT.

Detailed Application Field Plans

SN74LS123DG4 finds application in various fields, including: 1. Digital timing circuits 2. Communication systems 3. Industrial automation 4. Robotics 5. Instrumentation

Detailed and Complete Alternative Models

Some alternative models that offer similar functionality to SN74LS123DG4 are: 1. CD74HC123E 2. MC74HC123AN 3. HEF4538BP 4. 74HCT123D

These alternatives can be considered based on specific requirements and availability.

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Seznam 10 běžných otázek a odpovědí souvisejících s aplikací SN74LS123DG4 v technických řešeních

Sure! Here are 10 common questions and answers related to the application of SN74LS123DG4 in technical solutions:

  1. Q: What is SN74LS123DG4? A: SN74LS123DG4 is a dual retriggerable monostable multivibrator IC, commonly used for timing and delay applications.

  2. Q: What is the operating voltage range of SN74LS123DG4? A: The operating voltage range of SN74LS123DG4 is typically between 4.75V and 5.25V.

  3. Q: What is the maximum frequency at which SN74LS123DG4 can operate? A: SN74LS123DG4 can operate at a maximum frequency of around 33 MHz.

  4. Q: How many inputs does SN74LS123DG4 have? A: SN74LS123DG4 has two inputs, labeled A and B.

  5. Q: What is the purpose of the CLR (clear) input in SN74LS123DG4? A: The CLR input is used to reset the internal state of the IC and start the timing cycle from the beginning.

  6. Q: Can SN74LS123DG4 be used as a pulse stretcher? A: Yes, SN74LS123DG4 can be used as a pulse stretcher by connecting the input pulse to the A input and using the B input as the output.

  7. Q: What is the typical output pulse width range of SN74LS123DG4? A: The typical output pulse width range of SN74LS123DG4 is from 30 ns to 1000 ns.

  8. Q: Can SN74LS123DG4 be cascaded to achieve longer delay times? A: Yes, multiple SN74LS123DG4 ICs can be cascaded to achieve longer delay times by connecting the output of one IC to the input of another.

  9. Q: What is the maximum supply current required by SN74LS123DG4? A: The maximum supply current required by SN74LS123DG4 is typically around 16 mA.

  10. Q: Can SN74LS123DG4 tolerate higher voltages on its inputs? A: No, SN74LS123DG4 is not designed to tolerate voltages higher than its operating voltage range. It is recommended to use voltage level translators if interfacing with higher voltage signals.

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