SCDS488 December   2025 TMUX2819 , TMUX2821

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 Source or Drain RMS Current
    7. 5.7 Electrical Characteristics
    8. 5.8 Switching Characteristics
    9. 5.9 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  Propagation Delay
    6. 6.6  tON (VDD) and tOFF (VDD) Time
    7. 6.7  Transition Time
    8. 6.8  Break-Before-Make
    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 Device Functional Modes
    3. 7.3 Feature Description
      1. 7.3.1 Beyond the Supply
      2. 7.3.2 Bidirectional Operation
      3. 7.3.3 Power-Off Protection
      4. 7.3.4 1.2V and 1.8V Logic Compatible Inputs
      5. 7.3.5 Integrated Pull-Down Resistor on Logic Pins
      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
    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 Documentation Support
      1. 9.1.1 Related Documentation
    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 TMUX28xx is a complementary metal-oxide semiconductor (CMOS) multiplexer with 2 configurations available: 1:1, single-pole, single-throw (SPST) 2-channel (TMUX2821) and 2:1, single-pole, double-throw (SPDT) 1-channel (TMUX2819). This device works with a single supply (1.8V to 5.5V), but can pass bidirectional analog and digital signals beyond the supply from -5.5V to 5.5V.

The TMUX28xx also features bidirectional powered off protection up to ±5.5V, which isolates the switch even when there is no supply voltage present (VDD = 0V). Without this protection feature, any voltage on the switch can back-power the supply rail through an internal ESD diode and cause potential damage to the rest of the system.

With 0.001% THD+N and 1mΩ RON-flatness, the TMUX28xx is an excellent choice for passing precision analog and audio signals without adding distortion.

Package Information
PART NUMBER PACKAGE(1) PACKAGE SIZE(2)
TMUX2819 DSG (SON, 8) 2mm × 2mm
TMUX2821
(1) For more information, see Section 11.
(2) The package size (length × width) is a nominal value and includes pins, where applicable.
TMUX2821 TMUX2819 TMUX2819 and TMUX2821 Block DiagramTMUX2819 and TMUX2821 Block Diagram