SNOSBY1C June   1999  – December 2015 LMC567

PRODUCTION DATA.  

  1. 1 Features
  2. 2 Applications
  3. 3 Description
  4. 4 Revision History
  5. 5 Device Comparison Table
  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
    1. 8.1 Test Circuit
  9. 9 Detailed Description
    1. 9.1 Overview
    2. 9.2 Functional Block Diagram
    3. 9.3 Feature Description
      1. 9.3.1 Oscillator
      2. 9.3.2 Input
      3. 9.3.3 Loop Filter
      4. 9.3.4 Output Filter
      5. 9.3.5 Output
    4. 9.4 Device Functional Modes
      1. 9.4.1 Operation as LM567
  10. 10Application and Implementation
    1. 10.1 Application Information
    2. 10.2 Typical Application
      1. 10.2.1 Design Requirements
      2. 10.2.2 Detailed Design Procedure
        1. 10.2.2.1 Timing Components
        2. 10.2.2.2 Bandwidth
        3. 10.2.2.3 Output Filter
        4. 10.2.2.4 Supply Decoupling
      3. 10.2.3 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 Device Support
      1. 13.1.1 Development Support
    2. 13.2 Community 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

1 Features

  • Functionally Similar to LM567
  • 2-V to 9-V Supply Voltage Range
  • Low Supply Current Drain
  • No Increase in Current With Output Activated
  • Operates to 500-kHz Input Frequency
  • High Oscillator Stability
  • Ground-Referenced Input
  • Hysteresis Added to Amplitude Comparator
  • Out-of-Band Signals and Noise Rejected
  • 20-mA Output Current Capability

2 Applications

  • Touch-Tone Decoding
  • Precision Oscillators
  • Frequency Monitoring and Control
  • Wide-Band FSK Demodulation
  • Ultrasonic Controls
  • Carrier Current Remote Controls
  • Communications Paging Decoders

3 Description

The LMC567 device is a low-power, general-purpose LMCMOS tone decoder which is functionally similar to the industry standard LM567. The device consists of a twice frequency voltage-controlled oscillator (VCO) and quadrature dividers which establish the reference signals for phase and amplitude detectors.

The phase detector and VCO form a phase-locked loop (PLL) which locks to an input signal frequency which is within the control range of the VCO. When the PLL is locked and the input signal amplitude exceeds an internally pre-set threshold, a switch to ground is activated on the output pin. External components set up the oscillator to run at twice the input frequency and determine the phase and amplitude filter time constants.

Device Information (1)

PART NUMBER PACKAGE BODY SIZE (NOM)
LMC567 SOIC (8) 4.90 mm × 3.91 mm
  1. For all available packages, see the orderable addendum at the end of the data sheet.

Simplified Diagram

LMC567 blockdiagram_snosby1.gif