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DM74LS191N
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DM74LS191N

Product Overview

Category

DM74LS191N belongs to the category of integrated circuits (ICs).

Use

This IC is commonly used in digital electronics for various applications such as counters, registers, and arithmetic logic units.

Characteristics

  • High-speed operation
  • Low power consumption
  • Wide operating voltage range
  • TTL compatible inputs and outputs

Package

DM74LS191N is available in a 16-pin dual in-line package (DIP).

Essence

The essence of DM74LS191N lies in its ability to perform counting and arithmetic operations in digital systems efficiently.

Packaging/Quantity

DM74LS191N is typically packaged in tubes or trays, with quantities varying based on customer requirements.

Specifications

  • Supply Voltage: 4.75V to 5.25V
  • Operating Temperature Range: -55°C to +125°C
  • Maximum Clock Frequency: 25 MHz
  • Number of Counting Bits: 4
  • Maximum Count Value: 15 (binary)
  • Output Current: ±8 mA

Detailed Pin Configuration

  1. MR (Master Reset)
  2. CP (Clock Pulse)
  3. D0 (Data Input 0)
  4. D1 (Data Input 1)
  5. D2 (Data Input 2)
  6. D3 (Data Input 3)
  7. RC (Ripple Carry Output)
  8. QA (Output A)
  9. QB (Output B)
  10. QC (Output C)
  11. QD (Output D)
  12. GND (Ground)
  13. VCC (Supply Voltage)
  14. CE (Enable Input)
  15. U/D (Up/Down Control)
  16. PL (Parallel Load)

Functional Features

  • Up/Down Counting: The U/D pin controls the direction of counting.
  • Parallel Load: The PL pin allows loading of a preset value into the counter.
  • Ripple Carry Output: The RC pin provides a carry signal for cascading multiple counters.
  • Master Reset: The MR pin resets the counter to its initial state.
  • Clock Pulse: The CP pin triggers the counting operation.

Advantages and Disadvantages

Advantages

  • High-speed operation enables efficient counting in digital systems.
  • Low power consumption makes it suitable for battery-powered devices.
  • Wide operating voltage range ensures compatibility with various power supplies.
  • TTL compatible inputs and outputs facilitate integration with other digital components.

Disadvantages

  • Limited number of counting bits restricts the maximum count value.
  • Lack of built-in error detection or correction mechanisms.

Working Principles

DM74LS191N operates based on synchronous sequential logic. It utilizes flip-flops and combinational logic to perform counting and arithmetic operations. The clock pulse triggers the flip-flops, enabling them to store and propagate data. The up/down control determines the direction of counting, while the parallel load input allows presetting the counter's initial value. The ripple carry output facilitates cascading multiple counters for extended counting capabilities.

Detailed Application Field Plans

DM74LS191N finds applications in various fields, including: 1. Digital frequency dividers 2. Industrial automation systems 3. Electronic gaming machines 4. Traffic light controllers 5. Timekeeping circuits 6. Arithmetic units in microprocessors

Detailed and Complete Alternative Models

Some alternative models to DM74LS191N include: 1. SN74LS191 2. CD74LS191 3. 74HC191 4. 74HCT191

These alternatives offer similar functionality and can be used as replacements based on specific requirements.

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Enumere 10 preguntas y respuestas comunes relacionadas con la aplicación de DM74LS191N en soluciones técnicas

Sure! Here are 10 common questions and answers related to the application of DM74LS191N in technical solutions:

  1. Q: What is DM74LS191N? A: DM74LS191N is a 4-bit synchronous up/down binary counter with parallel load.

  2. Q: What are the typical applications of DM74LS191N? A: DM74LS191N is commonly used in digital systems for counting, frequency division, and control applications.

  3. Q: How does DM74LS191N work? A: It counts up or down based on the input signals and can be loaded with a specific value using the parallel load inputs.

  4. Q: What is the maximum clock frequency supported by DM74LS191N? A: The maximum clock frequency supported by DM74LS191N is typically around 25 MHz.

  5. Q: Can DM74LS191N count in both directions? A: Yes, DM74LS191N can count both up and down depending on the input signals provided.

  6. Q: How many bits can DM74LS191N count up to? A: DM74LS191N is a 4-bit counter, so it can count up to 15 (1111 in binary) before rolling over.

  7. Q: Can I connect multiple DM74LS191N counters together to increase the number of bits? A: Yes, you can cascade multiple DM74LS191N counters to increase the number of bits and achieve larger counting ranges.

  8. Q: What is the power supply voltage range for DM74LS191N? A: The recommended power supply voltage range for DM74LS191N is typically between 4.75V and 5.25V.

  9. Q: Does DM74LS191N have any built-in error detection or correction features? A: No, DM74LS191N does not have any built-in error detection or correction features. It is a basic counter IC.

  10. Q: Are there any specific precautions to consider when using DM74LS191N? A: Yes, it is important to ensure proper power supply decoupling and avoid exceeding the maximum ratings specified in the datasheet.

Please note that these answers are general and may vary depending on the specific implementation and datasheet of DM74LS191N.