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SN74HC251DBR
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SN74HC251DBR

Product Overview

  • Category: Integrated Circuit
  • Use: Data Selector/Multiplexer
  • Characteristics:
    • High-speed CMOS logic
    • Wide operating voltage range
    • Low power consumption
  • Package: SSOP (Shrink Small Outline Package)
  • Essence: 8-input multiplexer with 3-state outputs
  • Packaging/Quantity: Tape and Reel, 2500 pieces per reel

Specifications

  • Supply Voltage Range: 2V to 6V
  • Input Voltage Range: 0V to VCC
  • Output Voltage Range: 0V to VCC
  • Operating Temperature Range: -40°C to +85°C
  • Propagation Delay Time: 9 ns (typical)
  • Output Current: ±6 mA
  • Input Capacitance: 3.5 pF
  • Output Capacitance: 6 pF

Pin Configuration

The SN74HC251DBR has a total of 16 pins arranged as follows:

__ __ A1 -| 1 16 |- VCC B1 -| 2 15 |- Y1 A2 -| 3 14 |- Y2 B2 -| 4 13 |- Y3 A3 -| 5 12 |- Y4 B3 -| 6 11 |- Y5 A4 -| 7 10 |- Y6 B4 -| 8 9 |- GND ¯¯ ¯¯

Functional Features

  • 8-input multiplexer with common select inputs (A1-A4, B1-B4)
  • Three-state outputs (Y1-Y6) for bus-oriented applications
  • Enable input (GND) to control the outputs
  • High-speed operation suitable for data selection and routing applications
  • Low power consumption makes it ideal for portable devices

Advantages and Disadvantages

Advantages: - Wide operating voltage range allows compatibility with various systems - Low power consumption helps conserve battery life in portable devices - Three-state outputs enable easy integration into bus-oriented systems - High-speed operation ensures efficient data selection and routing

Disadvantages: - Limited to 8 inputs, may not be suitable for applications requiring more inputs - Propagation delay time of 9 ns may not meet the requirements of extremely high-speed applications

Working Principles

The SN74HC251DBR is a multiplexer that selects one of the eight inputs (A1-A4, B1-B4) based on the select inputs (A1-A4, B1-B4). The selected input is then routed to the corresponding output (Y1-Y6). The enable input (GND) controls whether the outputs are active or in a high-impedance state.

Detailed Application Field Plans

The SN74HC251DBR can be used in various applications, including but not limited to: - Data routing and selection in microcontrollers and digital systems - Address decoding in memory systems - Input/output expansion in embedded systems - Bus switching in communication systems

Alternative Models

Some alternative models to the SN74HC251DBR include: - CD4051B: 8-channel analog multiplexer/demultiplexer - 74HC151: 8-input multiplexer with non-inverting outputs - SN74LS157: Quad 2-line to 1-line data selectors/multiplexers

These alternative models offer similar functionality and can be considered as substitutes depending on specific requirements.

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Senaraikan 10 soalan dan jawapan biasa yang berkaitan dengan aplikasi SN74HC251DBR dalam penyelesaian teknikal

Sure! Here are 10 common questions and answers related to the application of SN74HC251DBR:

  1. Q: What is SN74HC251DBR? A: SN74HC251DBR is a multiplexer/demultiplexer IC (Integrated Circuit) that can be used in various technical solutions.

  2. Q: What is the purpose of SN74HC251DBR? A: SN74HC251DBR is designed to select one of eight data inputs and route it to a single output, or vice versa.

  3. Q: What is the voltage range supported by SN74HC251DBR? A: SN74HC251DBR supports a voltage range of 2V to 6V.

  4. Q: How many data inputs does SN74HC251DBR have? A: SN74HC251DBR has eight data inputs.

  5. Q: Can SN74HC251DBR be used as a demultiplexer? A: Yes, SN74HC251DBR can be used as both a multiplexer and a demultiplexer.

  6. Q: What is the maximum operating frequency of SN74HC251DBR? A: The maximum operating frequency of SN74HC251DBR is typically around 50 MHz.

  7. Q: Does SN74HC251DBR have any built-in protection features? A: No, SN74HC251DBR does not have any built-in protection features. External protection components may be required.

  8. Q: Can SN74HC251DBR handle analog signals? A: No, SN74HC251DBR is a digital IC and is designed to handle digital signals only.

  9. Q: What is the power supply requirement for SN74HC251DBR? A: SN74HC251DBR requires a power supply voltage of 2V to 6V.

  10. Q: Can SN74HC251DBR be cascaded to increase the number of inputs/outputs? A: Yes, multiple SN74HC251DBR ICs can be cascaded together to increase the number of inputs or outputs as required.

Please note that these answers are general and may vary depending on the specific application and requirements. It is always recommended to refer to the datasheet and consult with technical experts for accurate information.