Texas Instruments
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SN74LS279AN
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SN74LS279AN

Product Overview

Category

SN74LS279AN belongs to the category of integrated circuits (ICs).

Use

This product is commonly used in digital electronics for various applications such as data storage, counters, and arithmetic operations.

Characteristics

  • Low power consumption
  • High-speed operation
  • Wide operating voltage range
  • Compatibility with TTL logic levels

Package

SN74LS279AN is available in a 16-pin dual in-line package (DIP).

Essence

The essence of SN74LS279AN lies in its ability to perform reliable and efficient digital operations, making it an essential component in many electronic devices.

Packaging/Quantity

SN74LS279AN is typically packaged in tubes or trays, with each tube containing 25 units.

Specifications

  • Supply Voltage: 4.75V to 5.25V
  • Operating Temperature Range: -40°C to +85°C
  • Logic Family: LS-TTL
  • Number of Pins: 16
  • Maximum Clock Frequency: 33 MHz

Detailed Pin Configuration

  1. CLR (Clear)
  2. D0 (Data Input 0)
  3. D1 (Data Input 1)
  4. D2 (Data Input 2)
  5. D3 (Data Input 3)
  6. CLK (Clock Input)
  7. GND (Ground)
  8. Q0 (Output 0)
  9. Q1 (Output 1)
  10. Q2 (Output 2)
  11. Q3 (Output 3)
  12. VCC (Supply Voltage)
  13. NC (No Connection)
  14. NC (No Connection)
  15. NC (No Connection)
  16. NC (No Connection)

Functional Features

  • Clear input (CLR) resets the counter to zero.
  • Data inputs (D0-D3) are used to load initial values.
  • Clock input (CLK) triggers the counter to increment or decrement based on the logic level.
  • Outputs (Q0-Q3) provide the current count value.

Advantages and Disadvantages

Advantages

  • Low power consumption makes it suitable for battery-powered devices.
  • High-speed operation enables efficient data processing.
  • Wide operating voltage range allows compatibility with various systems.
  • LS-TTL logic family ensures reliable performance.

Disadvantages

  • Limited number of outputs restricts its use in applications requiring more than four bits of data storage.
  • Not suitable for high-frequency applications due to its maximum clock frequency limitation.

Working Principles

SN74LS279AN is a synchronous 4-bit up/down binary counter. It operates based on the clock input signal, which determines whether the counter increments or decrements. The clear input resets the counter to zero, while the data inputs allow loading of initial values. The outputs represent the current count value.

Detailed Application Field Plans

SN74LS279AN finds applications in various fields, including: 1. Digital calculators 2. Industrial control systems 3. Communication equipment 4. Automotive electronics 5. Consumer electronics

Detailed and Complete Alternative Models

Some alternative models that can be used as substitutes for SN74LS279AN are: 1. CD4516BE 2. MC14516B 3. 74HC191

These alternatives offer similar functionality and can be used interchangeably depending on specific requirements.

In conclusion, SN74LS279AN is a versatile integrated circuit widely used in digital electronics. Its low power consumption, high-speed operation, and compatibility with TTL logic levels make it an ideal choice for various applications. However, its limited number of outputs and maximum clock frequency should be considered when selecting this component for specific projects.

Seznam 10 běžných otázek a odpovědí souvisejících s aplikací SN74LS279AN v technických řešeních

Sure! Here are 10 common questions and answers related to the application of SN74LS279AN:

  1. Q: What is SN74LS279AN? A: SN74LS279AN is a quad set-reset latch, which is a type of digital logic IC (integrated circuit) used for storing and controlling binary data.

  2. Q: What is the purpose of SN74LS279AN? A: SN74LS279AN is commonly used in digital systems to store and control binary information, such as memory address decoding, data storage, and control signal generation.

  3. Q: How many latch circuits are there in SN74LS279AN? A: SN74LS279AN consists of four independent set-reset latch circuits, allowing it to store and control four separate bits of binary data.

  4. Q: What is the operating voltage range for SN74LS279AN? A: SN74LS279AN operates within a voltage range of 4.75V to 5.25V, making it compatible with standard TTL (Transistor-Transistor Logic) levels.

  5. Q: Can SN74LS279AN be used in both synchronous and asynchronous applications? A: Yes, SN74LS279AN can be used in both synchronous and asynchronous applications, depending on the specific requirements of the system.

  6. Q: What is the maximum clock frequency supported by SN74LS279AN? A: SN74LS279AN can operate at a maximum clock frequency of 33 MHz, allowing it to handle high-speed data processing.

  7. Q: Does SN74LS279AN have any built-in output enable feature? A: No, SN74LS279AN does not have a built-in output enable feature. The outputs are always active and reflect the current state of the latch.

  8. Q: Can SN74LS279AN be cascaded to increase the number of bits stored? A: Yes, SN74LS279AN can be cascaded by connecting the outputs of one latch to the inputs of another, allowing for the storage of more than four bits of data.

  9. Q: What is the power consumption of SN74LS279AN? A: The power consumption of SN74LS279AN is relatively low, typically around 10mW per latch circuit.

  10. Q: Are there any specific precautions to consider when using SN74LS279AN? A: It is important to ensure proper decoupling and bypass capacitors are used to minimize noise and stabilize the power supply. Additionally, care should be taken to avoid exceeding the maximum voltage and temperature ratings specified in the datasheet.

Please note that these answers are general and may vary depending on the specific application and requirements. Always refer to the datasheet and consult with a qualified engineer for accurate information.