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M74HC148TTR
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M74HC148TTR

Product Overview

Category

M74HC148TTR belongs to the category of integrated circuits (ICs).

Use

This IC is commonly used for high-speed priority encoding applications.

Characteristics

  • High-speed operation
  • Low power consumption
  • Wide operating voltage range
  • Compatible with TTL levels
  • Schmitt trigger inputs for noise immunity

Package

M74HC148TTR is available in a small outline package (TSSOP) with 16 pins.

Essence

The essence of M74HC148TTR lies in its ability to efficiently encode multiple input lines into a binary representation, prioritizing the highest order active input.

Packaging/Quantity

This IC is typically packaged in reels and each reel contains a quantity of 2500 units.

Specifications

  • Supply Voltage Range: 2V to 6V
  • Input Voltage Range: 0V to VCC
  • Operating Temperature Range: -40°C to +125°C
  • Output Current: ±25mA
  • Propagation Delay Time: 15ns (max)
  • Power Dissipation: 500mW

Detailed Pin Configuration

  1. A0 (Input)
  2. A1 (Input)
  3. A2 (Input)
  4. A3 (Input)
  5. A4 (Input)
  6. A5 (Input)
  7. A6 (Input)
  8. GND (Ground)
  9. D0 (Output)
  10. D1 (Output)
  11. D2 (Output)
  12. D3 (Output)
  13. D4 (Output)
  14. D5 (Output)
  15. D6 (Output)
  16. VCC (Power)

Functional Features

  • Priority encoding of 8 input lines
  • Active-high outputs representing the encoded binary value
  • Inputs equipped with Schmitt triggers for noise immunity
  • Outputs can drive standard TTL loads

Advantages and Disadvantages

Advantages

  • High-speed operation enables efficient encoding of input lines
  • Low power consumption makes it suitable for battery-powered devices
  • Wide operating voltage range allows compatibility with various systems
  • Schmitt trigger inputs provide robustness against noise

Disadvantages

  • Limited number of input lines (8 in this case)
  • Not suitable for applications requiring priority encoding of a larger number of inputs

Working Principles

M74HC148TTR works by examining the input lines and determining the highest order active input. It then encodes this information into a binary representation using its internal circuitry. The encoded value is presented on the output pins, allowing further processing or utilization.

Detailed Application Field Plans

M74HC148TTR finds application in various fields where priority encoding is required. Some specific areas of use include:

  1. Data communication systems
  2. Address decoding in memory devices
  3. Interrupt handling in microcontrollers
  4. Priority-based control systems
  5. Multiplexing and demultiplexing circuits

Detailed and Complete Alternative Models

  1. 74HC148: Similar functionality to M74HC148TTR but available in a different package (DIP).
  2. CD74HC148: Equivalent IC from a different manufacturer (Texas Instruments).
  3. SN74HC148: Another alternative from Texas Instruments, offering similar features.

These alternative models can be considered based on specific requirements, availability, and compatibility with existing systems.

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Liste 10 almindelige spørgsmål og svar relateret til anvendelsen af M74HC148TTR i tekniske løsninger

Sure! Here are 10 common questions and answers related to the application of M74HC148TTR in technical solutions:

1. What is M74HC148TTR? - M74HC148TTR is a high-speed CMOS 8-to-3 line priority encoder IC.

2. What is the purpose of a priority encoder? - A priority encoder is used to encode multiple inputs into a binary code, where the highest priority input is encoded first.

3. What are the key features of M74HC148TTR? - Some key features of M74HC148TTR include high-speed operation, low power consumption, wide supply voltage range, and compatibility with TTL levels.

4. How many inputs does M74HC148TTR have? - M74HC148TTR has 8 inputs (A0-A7) that can be encoded into a 3-bit binary output.

5. What is the maximum operating frequency of M74HC148TTR? - The maximum operating frequency of M74HC148TTR is typically around 50 MHz.

6. Can M74HC148TTR handle both active-high and active-low inputs? - No, M74HC148TTR only accepts active-high inputs. Active-low inputs need to be inverted before connecting to the IC.

7. How does M74HC148TTR prioritize the inputs? - M74HC148TTR prioritizes the inputs based on their numerical value, where the highest value input takes priority over lower value inputs.

8. What is the output format of M74HC148TTR? - The output of M74HC148TTR is a 3-bit binary code representing the highest priority input.

9. Can M74HC148TTR be cascaded to handle more inputs? - Yes, multiple M74HC148TTR ICs can be cascaded together to handle a larger number of inputs.

10. What are some common applications of M74HC148TTR? - M74HC148TTR is commonly used in applications where priority encoding is required, such as in microprocessors, data multiplexing, interrupt handling, and address decoding.

Please note that these questions and answers are for informational purposes only and may vary depending on the specific requirements and use cases.