SNOSBQ4F May   1999  – January 2022 LM567C

PRODUCTION DATA  

  1. 1 Features
  2. 2 Applications
  3. 3 Description
  4. 4 Revision History
  5. 5 Device Comparison
  6. 6 Pin Configuration and Functions
  7. 7 Specifications
    1. 7.1 Absolute Maximum Ratings
    2. 7.2 Recommended Operating Conditions
    3. 7.3 Thermal Information
    4. 7.4 Electrical Characteristics
    5. 7.5 Typical Characteristics
  8. 8 Parameter Measurement Information
  9. 9 Detailed Description
    1. 9.1 Overview
    2. 9.2 Functional Block Diagram
    3. 9.3 Feature Description
      1. 9.3.1 Center Frequency
      2. 9.3.2 Output Filter
      3. 9.3.3 Loop Filter
      4. 9.3.4 Logic Output
      5. 9.3.5 Die Characteristics
    4. 9.4 Device Functional Modes
      1. 9.4.1 Operation With Vi < 200m – VRMS
      2. 9.4.2 Operation With Vi > 200m – VRMS
  10. 10Application and Implementation
    1. 10.1 Application Information
    2. 10.2 Typical Applications
      1. 10.2.1 Touch-Tone Decoder
        1. 10.2.1.1 Design Requirements
        2. 10.2.1.2 Detailed Design Procedure
          1. 10.2.1.2.1 Timing Components
          2. 10.2.1.2.2 Bandwidth
          3. 10.2.1.2.3 Output Filter
        3. 10.2.1.3 Application Curve
      2. 10.2.2 Oscillator with Quadrature Output
        1. 10.2.2.1 Design Requirements
        2. 10.2.2.2 Detailed Design Procedure
        3. 10.2.2.3 Application Curve
      3. 10.2.3 Oscillator with Double Frequency Output
        1. 10.2.3.1 Design Requirements
        2. 10.2.3.2 Detailed Design Procedure
        3. 10.2.3.3 Application Curve
      4. 10.2.4 Precision Oscillator Drive 100-mA Loads
        1. 10.2.4.1 Design Requirements
        2. 10.2.4.2 Detailed Design Procedure
        3. 10.2.4.3 Application Curve
      5. 10.2.5 AC Test Circuit
        1. 10.2.5.1 Design Requirements
        2. 10.2.5.2 Detailed Design Procedure
        3. 10.2.5.3 Application Curve
  11. 11Power Supply Recommendations
  12. 12Layout
    1. 12.1 Layout Guidelines
    2. 12.2 Layout Example
  13. 13Device and Documentation Support
    1. 13.1 Receiving Notification of Documentation Updates
    2. 13.2 Support Resources
    3. 13.3 Trademarks
    4. 13.4 Electrostatic Discharge Caution
    5. 13.5 Glossary
  14. 14Mechanical, Packaging, and Orderable Information

Package Options

Mechanical Data (Package|Pins)
Thermal pad, mechanical data (Package|Pins)
Orderable Information

10.1 Application Information

The LM567 tone decoder is a device capable of detecting if an input signal is inside a selectable range of detection. The device has an open collector transistor output, so an external resistor is required to achieve proper logic levels. When the input signal is inside the detection band, the device output will go to a LOW state. The internal VCO free running frequency establishes the detection band central frequency. An external RC filter is required to set this frequency. The bandwidth in which the device will detect the desired frequency depends on the capacitance of loop filter terminal. Typically a 1µF capacitor is connected to this pin. The device detection band has a different behavior for low and high input voltage levels. Refer to the Section 9.4.1 section and the Section 9.4.2 section for more information.