SCHS463 May   2025 CD3268A , CD3269A

PRODUCTION DATA  

  1.   1
  2. 1 Features
  3. 2 Applications
  4. 3 Description
  5. 4 Pin Configuration and Functions
  6. 5 Specifications
    1. 5.1 Absolute Maximum Ratings
    2. 5.2 ESD Ratings
    3. 5.3 Recommended Operating Conditions
    4. 5.4 Thermal Information
    5. 5.5 Electrical Characteristics
    6. 5.6 Timing Requirements
  7. 6 Parameter Measurement Information
    1. 6.1 eN-MIC Microphone Integrated Noise Measurement
    2. 6.2 Current Measurements
    3. 6.3 MICPWR Output Voltage Measurement
    4. 6.4 Tone Mode Threshold Measurements
    5. 6.5 Impedance Measurements
    6. 6.6 Tone Mode Output Measurements
  8. 7 Detailed Description
    1. 7.1 Overview
    2. 7.2 Functional Block Diagram
    3. 7.3 Feature Description
      1. 7.3.1 Tone Mode Start-up Timing
      2. 7.3.2 Authentication
      3. 7.3.3 Shunt Regulator
      4. 7.3.4 Power-on-reset
    4. 7.4 Device Functional Modes
      1. 7.4.1 Button Mode
      2. 7.4.2 Tone Mode
  9. 8 Application and Implementation
    1. 8.1 Application Information
    2. 8.2 Typical Application
      1. 8.2.1 Design Requirements
      2. 8.2.2 Application Curves
    3. 8.3 Power Supply Recommendations
    4. 8.4 Layout
      1. 8.4.1 Layout Guidelines
      2. 8.4.2 Layout Example
  10. 9 Device and Documentation Support
    1. 9.1 Device Support
      1. 9.1.1 Third-Party Products Disclaimer
      2. 9.1.2 Development Support
    2. 9.2 Receiving Notification of Documentation Updates
    3. 9.3 Support Resources
    4. 9.4 Trademarks
    5. 9.5 Electrostatic Discharge Caution
    6. 9.6 Glossary
  11. 10Revision History
  12. 11Mechanical, Packaging, and Orderable Information

Package Options

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

3 Description

The CD326x supports two operating modes; button mode and tone mode. Button mode offers no microphone support. Button mode passes the DC voltage from an external switch-resistor network (tied to the REM pin) to the MIC pin to measure the voltage externally. Tone mode offers microphone support and senses button presses based on an external switch-resistor network (tied to the REM pin). Tone mode generates corresponding ultrasonic signals that are superimposed (via a driver output on the TONE pin) on the system MICBIAS line. These signals control audio functions when connected to a specially enabled audio interface. The input DC bias level provided on the MIC pin controls button or tone mode selection. During tone mode, the CD326x also provides functionality to control or bias an external MEMS (micro-electrical-mechanical systems) technology microphone module.

Package Information
PART NUMBERPACKAGE(1)PACKAGE SIZE(2)
CD3268YZP (DSBGA, 6)1.45mm × 0.95mm × 0.5mm
CD3269YZP (DSBGA, 6)1.45mm × 0.95mm × 0.5mm
(1) For all available packages, see the orderable addendum in Section 11
(2) The package size (length × width × height) is a nominal value and includes pins, where applicable



Device Information
PART NUMBERTX ACK TONE FREQUENCY (kHz) (TYP)EQUIVALENT BUTTON
CD32681301
CD32691652





CD3268A CD3269A Simplified ApplicationSimplified Application