Texas Instruments
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SN74HC191N
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SN74HC191N

Product Overview

Category

SN74HC191N belongs to the category of integrated circuits (ICs).

Use

This IC is commonly used as a synchronous, up/down binary counter.

Characteristics

  • Synchronous operation
  • High-speed performance
  • Low power consumption
  • Wide operating voltage range

Package

SN74HC191N is available in a 16-pin DIP (Dual Inline Package) format.

Essence

The essence of SN74HC191N lies in its ability to count up or down based on the input signals and perform various arithmetic operations.

Packaging/Quantity

SN74HC191N is typically packaged in tubes or reels, with quantities varying depending on the supplier.

Specifications

  • Supply Voltage: 2V - 6V
  • Operating Temperature Range: -40°C to +85°C
  • Maximum Clock Frequency: 25 MHz
  • Number of Counting Bits: 4
  • Logic Family: HC (High-Speed CMOS)

Detailed Pin Configuration

  1. MR (Master Reset)
  2. CP (Clock Pulse)
  3. UP/DOWN
  4. PE (Parallel Enable)
  5. D0 (Data Input 0)
  6. D1 (Data Input 1)
  7. D2 (Data Input 2)
  8. D3 (Data Input 3)
  9. Q0 (Output Bit 0)
  10. Q1 (Output Bit 1)
  11. Q2 (Output Bit 2)
  12. Q3 (Output Bit 3)
  13. TC (Terminal Count)
  14. GND (Ground)
  15. VCC (Supply Voltage)
  16. NC (No Connection)

Functional Features

  • Synchronous counting in both up and down directions
  • Parallel load capability for presetting the counter value
  • Terminal count output for indicating when the counter reaches its maximum value
  • Master reset for resetting the counter to its initial state

Advantages and Disadvantages

Advantages

  • High-speed operation allows for efficient counting in various applications.
  • Low power consumption makes it suitable for battery-powered devices.
  • Wide operating voltage range provides flexibility in different electronic systems.

Disadvantages

  • Limited number of counting bits restricts the maximum count value.
  • Lack of built-in carry/borrow logic may require additional circuitry for cascading multiple counters.

Working Principles

SN74HC191N operates based on synchronous logic, where the counting action is synchronized with a clock pulse. The UP/DOWN input determines the direction of counting, while the CP input triggers the counter to increment or decrement based on the selected direction. The parallel enable (PE) input allows for loading a preset value into the counter. The terminal count (TC) output indicates when the counter reaches its maximum value.

Detailed Application Field Plans

SN74HC191N finds applications in various fields, including: 1. Digital frequency dividers 2. Industrial automation 3. Electronic gaming 4. Automotive electronics 5. Communication systems

Detailed and Complete Alternative Models

Some alternative models that can be considered as alternatives to SN74HC191N are: 1. CD40193 - CMOS up/down counter IC 2. 74LS191 - TTL up/down counter IC 3. CD4510 - CMOS synchronous BCD counter IC 4. 74HC193 - High-speed CMOS up/down counter IC

These alternative models offer similar functionalities and can be used as replacements depending on specific requirements.

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Énumérez 10 questions et réponses courantes liées à l'application de SN74HC191N dans les solutions techniques

Sure! Here are 10 common questions and answers related to the application of SN74HC191N in technical solutions:

  1. Q: What is SN74HC191N? A: SN74HC191N is a 4-bit synchronous up/down binary counter IC (integrated circuit) that can be used in various digital applications.

  2. Q: What is the operating voltage range for SN74HC191N? A: The operating voltage range for SN74HC191N is typically between 2V and 6V.

  3. Q: Can SN74HC191N be used as a frequency divider? A: Yes, SN74HC191N can be used as a frequency divider by connecting the appropriate clock signal and setting the desired count value.

  4. Q: How does the up/down counting feature work in SN74HC191N? A: The up/down counting feature in SN74HC191N is controlled by the Up/Down input pin. When this pin is high, the counter counts up, and when it is low, the counter counts down.

  5. Q: What is the maximum clock frequency supported by SN74HC191N? A: The maximum clock frequency supported by SN74HC191N is typically around 25 MHz.

  6. Q: Can SN74HC191N be cascaded to create larger counters? A: Yes, multiple SN74HC191N ICs can be cascaded together to create larger counters with more bits.

  7. Q: Does SN74HC191N have any built-in ripple carry output? A: No, SN74HC191N does not have a built-in ripple carry output. However, it has a borrow output pin for borrow propagation during down counting.

  8. Q: What is the purpose of the preset inputs in SN74HC191N? A: The preset inputs (P0, P1, P2, and P3) in SN74HC191N allow you to set an initial count value when the counter is enabled.

  9. Q: Can SN74HC191N be used in synchronous applications? A: Yes, SN74HC191N is designed for synchronous operation, meaning that all internal flip-flops are clocked simultaneously.

  10. Q: What are some common applications of SN74HC191N? A: SN74HC191N can be used in various applications such as frequency division, event counting, timekeeping, digital displays, and control systems.

Please note that these answers are general and may vary depending on specific circuit designs and requirements.