SCDS464B June   2023  – July 2024 TMUX2889

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 Thermal Information
    4. 5.4 Recommended Operating Conditions
    5. 5.5 Source or Drain Continuous Current
    6. 5.6 Electrical Characteristics
    7. 5.7 Switching Characteristics
    8. 5.8 Typical Characteristics
  7. 6 Parameter Measurement Information
    1. 6.1  On-Resistance
    2. 6.2  On-Leakage Current
    3. 6.3  Off-Leakage Current
    4. 6.4  Power-Off Leakage Current
    5. 6.5  tON (VDD) and tOFF (VDD) Time
    6. 6.6  Transition Time
    7. 6.7  Break-Before-Make
    8. 6.8  Propagation Delay
    9. 6.9  THD + Noise
    10. 6.10 Power Supply Rejection Ratio (PSRR)
    11. 6.11 Charge Injection
    12. 6.12 Bandwidth
    13. 6.13 Off Isolation
    14. 6.14 Crosstalk
  8. 7 Detailed Description
    1. 7.1 Functional Block Diagram
    2. 7.2 Truth Table
    3. 7.3 Feature Description
      1. 7.3.1 Beyond the Supply
      2. 7.3.2 Bidirectional Operation
      3. 7.3.3 Over Temperature Protection
      4. 7.3.4 Power-off Protection
      5. 7.3.5 1.8 V Logic Compatible Inputs
      6. 7.3.6 Fail-Safe Logic
  9. 8 Application and Implementation
    1. 8.1 Application Information
    2. 8.2 Typical Applications
      1. 8.2.1 Audio Input or Output Switching
        1. 8.2.1.1 Design Requirements
        2. 8.2.1.2 Detailed Design Procedure
        3. 8.2.1.3 Application Curve
    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 Receiving Notification of Documentation Updates
    2. 9.2 Support Resources
    3. 9.3 Trademarks
    4. 9.4 Electrostatic Discharge Caution
    5. 9.5 Glossary
  11. 10Revision History
  12. 11Mechanical, Packaging, and Orderable Information
    1. 11.1 Mechanical Data

Package Options

Refer to the PDF data sheet for device specific package drawings

Mechanical Data (Package|Pins)
  • YBH|9
Thermal pad, mechanical data (Package|Pins)
Orderable Information

8.2.1 Audio Input or Output Switching

When there are multiple audio inputs available such as a line-in and a wireless connection, a switch/multiplexer is needed to switch between audio sources. This same scheme can be used in systems where there are multiple speaker outputs and one source as well. A TMUX2889 can be used for all of these use cases, easily supporting line-in audio up to ±5.5V with a supply/battery voltage from 1.8 to 5.5V. Figure 8-1 shows the block diagram for these applications. Additionally, if IEC protection is needed on the external connectors (audio jack input or external speaker), 2 TPD1E10B06 can be used.

The TMUX2889 features excellent THD+N performance, so there is minimal impact to the audio signal quality through the switch. This allows the system designer to save a significant portion of board area without impacting signal integrity. Additionally, because of the low supply current requirement, the device's supply can be driven directly with a GPIO, allowing the user to put the device into a ultra-low power mode. In this mode the TMUX2889 operates with powered-off protection, so any high voltage present on the inputs will not propagate to the outputs. This helps keep correct power up cycling and increases system robustness.

TMUX2889 Audio Headphone and Speaker Output Switching Figure 8-1 Audio Headphone and Speaker Output Switching
TMUX2889 Hearing Aid Telecoil MUX Figure 8-2 Hearing Aid Telecoil MUX