SCLS428I May   1999  – September  2015 SN74LV4051A

UNLESS OTHERWISE NOTED, this document contains PRODUCTION DATA.  

  1. 1 Features
  2. 2 Applications
  3. 3 Description
  4. 4 Revision History
  5. 5 Pin Configuration and Functions
  6. 6 Specifications
    1. 6.1  Absolute Maximum Ratings
    2. 6.2  ESD Ratings
    3. 6.3  Recommended Operating Conditions
    4. 6.4  Thermal Information
    5. 6.5  Electrical Characteristics
    6. 6.6  Operating Characteristics
    7. 6.7  Switching Characteristics: VCC = 2.5 V ± 0.2 V
    8. 6.8  Switching Characteristics: VCC = 3.3 V ± 0.3 V
    9. 6.9  Switching Characteristics: VCC = 5 V ± 0.5 V
    10. 6.10 Analog Switch Characteristics
    11. 6.11 Typical Characteristics
  7. 7 Parameter Measurement Information
  8. 8 Detailed Description
    1. 8.1 Overview
    2. 8.2 Functional Block Diagram
    3. 8.3 Feature Description
    4. 8.4 Device Functional Modes
  9. 9 Application and Implementation
    1. 9.1 Application Information
    2. 9.2 Typical Application
      1. 9.2.1 Design Requirements
      2. 9.2.2 Detailed Design Procedure
      3. 9.2.3 Application Curve
  10. 10Power Supply Recommendations
  11. 11Layout
    1. 11.1 Layout Guidelines
    2. 11.2 Layout Example
  12. 12Device and Documentation Support
    1. 12.1 Documentation Support
      1. 12.1.1 Related Documentation
    2. 12.2 Community Resources
    3. 12.3 Trademarks
    4. 12.4 Electrostatic Discharge Caution
    5. 12.5 Glossary
  13. 13Mechanical, Packaging, and Orderable Information

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メカニカル・データ（パッケージ｜ピン）
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発注情報

9 Application and Implementation

NOTE

Information in the following applications sections is not part of the TI component specification, and TI does not warrant its accuracy or completeness. TI’s customers are responsible for determining suitability of components for their purposes. Customers should validate and test their design implementation to confirm system functionality.

9.1 Application Information

A multiplexer is used in applications where multiple signals share a resource. In Figure 11, several different sensors are connected to the analog-to-digital converter (ADC) of a microcontroller unit (MCU).

9.2 Typical Application

SN74LV4051A sn74lv4051a_Typ_App_scls428.png Figure 11. Example of Multiplexer Use With Analog Sensors and the ADC of an MCU

9.2.1 Design Requirements

Designing with the SN74LV4051A device requires a stable input voltage between 2 V (see Recommended Operating Conditions for details) and 5.5 V. Another important design consideration are the characteristics of the signal being multiplexed—ensure no important information is lost due to timing or incompatibility with this device.

9.2.2 Detailed Design Procedure

Normally, processing eight different analog signals requires eight separate ADCs, but Figure 11 shows how to achieve this using only one ADC and four GPIOs (general-purpose input/outputs).

9.2.3 Application Curve

SN74LV4051A lv4051a_ronpeak.gif Figure 12. Plot at 25°C for VCC vs Max RON(peak)