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DM74LS279N
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DM74LS279N

Product Overview

  • Category: Integrated Circuit (IC)
  • Use: Counter/Divider
  • Characteristics: TTL Logic, Quad D-Type Flip-Flop with Reset
  • Package: 16-pin Plastic Dual In-Line Package (PDIP)
  • Essence: The DM74LS279N is a quad D-type flip-flop with reset, designed for general-purpose counter and register applications.
  • Packaging/Quantity: Available in tubes or reels, with a quantity of 25 pieces per tube/reel.

Specifications

  • Logic Family: LS-TTL
  • Number of Flip-Flops: 4
  • Number of Pins: 16
  • Supply Voltage Range: 4.75V to 5.25V
  • Operating Temperature Range: 0°C to 70°C
  • Propagation Delay Time: 15ns (typical)
  • Power Dissipation: 22mW (typical)

Detailed Pin Configuration

The DM74LS279N has a 16-pin configuration as follows:

+---+--+---+ Q1 |1 +--+ 16| Vcc D1 |2 15| Q4 D2 |3 14| D4 Q2 |4 13| R D3 |5 12| CLR Q3 |6 11| CLK GND |7 10| D4 Q3 |8 9| D1 +----------+

Functional Features

  • Quad D-Type Flip-Flop: The DM74LS279N consists of four independent D-type flip-flops, each with an active-low asynchronous reset input (CLR).
  • Synchronous Operation: The flip-flops are clocked simultaneously by a common clock input (CLK).
  • Reset Functionality: The asynchronous reset input (CLR) allows the user to clear all four flip-flops to a low state.
  • TTL Logic: The DM74LS279N operates on Low Power Schottky (LS-TTL) logic, providing reliable and efficient performance.

Advantages and Disadvantages

Advantages

  • Versatile: Suitable for various counter and register applications.
  • Compact Design: Integration of four flip-flops in a single IC package saves board space.
  • Reliable: Utilizes LS-TTL technology for robust operation.

Disadvantages

  • Limited Voltage Range: The supply voltage range is relatively narrow (4.75V to 5.25V).
  • Temperature Sensitivity: Operating temperature range limited to 0°C to 70°C.

Working Principles

The DM74LS279N operates as a synchronous counter/divider. The D-type flip-flops store and transfer data based on the clock signal (CLK). The asynchronous reset input (CLR) allows for clearing the flip-flops to a low state. The LS-TTL logic ensures reliable operation with low power consumption.

Detailed Application Field Plans

The DM74LS279N can be used in various applications, including: 1. Digital Counters: Used to count events or signals in digital systems. 2. Frequency Dividers: Divide the frequency of an input signal by a specific factor. 3. Shift Registers: Store and shift data in serial-in, parallel-out or parallel-in, serial-out configurations. 4. Control Circuits: Used in control systems for sequential logic operations.

Detailed and Complete Alternative Models

Some alternative models that provide similar functionality to the DM74LS279N include: - SN74LS279N - MC74LS279N - CD74LS279N

These models are compatible with the DM74LS279N and can be used as drop-in replacements.

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Enumere 10 preguntas y respuestas comunes relacionadas con la aplicación de DM74LS279N en soluciones técnicas

Sure! Here are 10 common questions and answers related to the application of DM74LS279N in technical solutions:

  1. Q: What is DM74LS279N? A: DM74LS279N is a quad SR latch with complementary outputs, commonly used in digital logic circuits.

  2. Q: What are the main features of DM74LS279N? A: The main features include four independent SR latches, active-high and active-low outputs, and wide operating voltage range.

  3. Q: How can DM74LS279N be used in technical solutions? A: It can be used for various applications such as memory storage, data synchronization, address decoding, and control signal generation.

  4. Q: What is the maximum operating frequency of DM74LS279N? A: The maximum operating frequency is typically around 25 MHz.

  5. Q: Can DM74LS279N be used in both TTL and CMOS logic systems? A: Yes, DM74LS279N is compatible with both TTL and CMOS logic families.

  6. Q: What is the power supply voltage range for DM74LS279N? A: The power supply voltage range is typically between 4.75V and 5.25V.

  7. Q: Does DM74LS279N have any built-in protection features? A: No, DM74LS279N does not have built-in protection features. External measures should be taken to prevent damage from electrostatic discharge or excessive current.

  8. Q: Can DM74LS279N be cascaded to increase the number of latch outputs? A: Yes, multiple DM74LS279N chips can be cascaded together to increase the number of latch outputs.

  9. Q: What is the typical propagation delay of DM74LS279N? A: The typical propagation delay is around 15 ns.

  10. Q: Are there any specific precautions to consider when using DM74LS279N? A: It is important to ensure proper power supply decoupling, avoid exceeding the maximum ratings, and follow the recommended operating conditions mentioned in the datasheet.