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74HC251D/AUJ
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74HC251D/AUJ

Product Overview

  • Category: Integrated Circuit (IC)
  • Use: Data Selector/Multiplexer
  • Characteristics: High-speed, CMOS logic, 8-channel multiplexer
  • Package: SOIC (Small Outline Integrated Circuit)
  • Essence: The 74HC251D/AUJ is a multiplexer IC that allows the selection of one out of eight data inputs and routes it to a single output.
  • Packaging/Quantity: Available in tape and reel packaging, with 2500 units per reel.

Specifications

  • Supply Voltage: 2V to 6V
  • Input Voltage: 0V to Vcc
  • Output Voltage: 0V to Vcc
  • Operating Temperature Range: -40°C to +125°C
  • Propagation Delay: 11 ns (typical)
  • Input Capacitance: 3.5 pF (typical)
  • Output Current: ±25 mA

Pin Configuration

The 74HC251D/AUJ has a total of 16 pins arranged as follows:

+----+--+----+ A1 -|1 +--+ 16|- Vcc A2 -|2 15|- B A3 -|3 14|- C A4 -|4 13|- D A5 -|5 74HC251D/AUJ 12|- E A6 -|6 11|- F A7 -|7 10|- G A8 -|8 9|- H GND -|9 +--+ 8|- Y +----+--+----+

Functional Features

  • 8-channel multiplexer with common select inputs (A1-A8)
  • Single output (Y) for the selected input
  • High-speed operation suitable for various applications
  • CMOS logic ensures low power consumption
  • Wide operating voltage range allows compatibility with different systems

Advantages and Disadvantages

Advantages: - Fast propagation delay enables high-speed data selection - Low power consumption due to CMOS technology - Versatile application possibilities

Disadvantages: - Limited to 8 input channels - Requires external control signals for proper operation

Working Principles

The 74HC251D/AUJ is a multiplexer IC that operates based on the select inputs (A1-A8). The desired input channel is selected by providing the appropriate binary code on these inputs. The selected input is then routed to the output pin (Y), while all other inputs are disconnected.

Detailed Application Field Plans

The 74HC251D/AUJ can be used in various applications, including: 1. Data routing and selection in digital systems 2. Address decoding in memory systems 3. Input selection in analog-to-digital converters 4. Channel selection in communication systems

Alternative Models

Here are some alternative models that provide similar functionality: - CD4051B: 8-channel analog multiplexer/demultiplexer - SN74LS151: 8-line to 1-line data selector/multiplexer - MC14051B: 8-channel analog multiplexer/demultiplexer

These alternatives can be considered based on specific requirements and compatibility with the existing system.

In conclusion, the 74HC251D/AUJ is a versatile multiplexer IC that offers high-speed data selection with low power consumption. Its compact SOIC package and wide operating voltage range make it suitable for various applications in digital and analog systems.

Word count: 346 words

기술 솔루션에 74HC251D/AUJ 적용과 관련된 10가지 일반적인 질문과 답변을 나열하세요.

  1. What is the 74HC251D/AUJ used for?

    • The 74HC251D/AUJ is a multiplexer/demultiplexer used for data selection in various technical solutions.

  2. What are the key features of the 74HC251D/AUJ?

    • It has 8 input/output pins, low power consumption, and wide operating voltage range.

  3. How does the 74HC251D/AUJ handle data selection?

    • It uses control inputs to select one of the 8 data inputs to be routed to the single output.

  4. What is the maximum operating frequency of the 74HC251D/AUJ?

    • The maximum operating frequency is typically around 50 MHz.

  5. Can the 74HC251D/AUJ be cascaded for larger applications?

    • Yes, multiple 74HC251D/AUJ can be cascaded to expand the number of input/output channels.

  6. What are the typical applications of the 74HC251D/AUJ?

    • It is commonly used in data acquisition systems, signal routing, and general-purpose digital multiplexing.

  7. What is the power supply voltage range for the 74HC251D/AUJ?

    • It typically operates within a range of 2V to 6V.

  8. Does the 74HC251D/AUJ have built-in protection features?

    • It has diode protection on all inputs and outputs to safeguard against electrostatic discharge.

  9. Is the 74HC251D/AUJ compatible with standard logic families?

    • Yes, it is compatible with TTL, CMOS, and other standard logic families.

  10. Are there any special considerations for PCB layout when using the 74HC251D/AUJ?

    • Proper decoupling capacitors and signal integrity practices should be followed for optimal performance.

I hope this helps! Let me know if you need anything else.