SCDS487A October   2025  – December 2025 TMUX4819 , TMUX4821

PRODUCTION DATA  

  1.   1
  2. 1 Features
  3. 2 Applications
  4. 3 Description
  5. 4 Pin Configuration and Functions
  6. 5 Absolute Maximum Ratings
  7. 6 ESD Ratings
  8. 7 Thermal Information
  9. 8 Recommended Operating Conditions
  10. 9 Source or Drain Continuous Current
  11. 10Source or Drain RMS Current
  12. 11Electrical Characteristics 
  13. 12Switching Characteristics 
  14. 13Typical Characteristics
  15. 14Parameter Measurement Information
    1. 14.1  On-Resistance
    2. 14.2  On-Leakage Current
    3. 14.3  Off-Leakage Current
    4. 14.4  Power-Off Leakage Current
    5. 14.5  Propagation Delay
    6. 14.6  tON (VDD) and tOFF (VDD) Time
    7. 14.7  Transition Time
    8. 14.8  Break-Before-Make
    9. 14.9  THD + Noise
    10. 14.10 Power Supply Rejection Ratio (PSRR)
    11. 14.11 Charge Injection
    12. 14.12 Bandwidth
    13. 14.13 Off Isolation
    14. 14.14 Crosstalk
  16. 15Detailed Description
    1. 15.1 Functional Block Diagram
    2. 15.2 Device Functional Modes
    3. 15.3 Feature Description
      1. 15.3.1 Beyond the Supply
      2. 15.3.2 Bidirectional Operation
      3. 15.3.3 Power-Off Protection
      4. 15.3.4 1.2V and 1.8V Logic Compatible Inputs
      5. 15.3.5 Integrated Pull-Down Resistor on Logic Pins
      6. 15.3.6 Fail-Safe Logic
  17. 16Application and Implementation
    1. 16.1 Application Information
    2. 16.2 Typical Applications
      1. 16.2.1 Audio Amplifier Switching
        1. 16.2.1.1 Design Requirements
        2. 16.2.1.2 Detailed Design Procedure
        3. 16.2.1.3 Application Curves
      2. 16.2.2 Smart Drug Delivery Flow Meters
        1. 16.2.2.1 Design Requirements
        2. 16.2.2.2 Detailed Design Procedure
        3. 16.2.2.3 Application Curve
    3. 16.3 Power Supply Recommendations
    4. 16.4 Layout
      1. 16.4.1 Layout Guidelines
      2. 16.4.2 Layout Example
  18. 17Device and Documentation Support
    1. 17.1 Documentation Support
      1. 17.1.1 Related Documentation
    2. 17.2 Receiving Notification of Documentation Updates
    3. 17.3 Support Resources
    4. 17.4 Trademarks
    5. 17.5 Electrostatic Discharge Caution
    6. 17.6 Glossary
  19. 18Revision History
  20. 19Mechanical, Packaging, and Orderable Information

Package Options

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

4 Pin Configuration and Functions

TMUX4821 TMUX4819 DSG Package TMUX4821 (1:1 2ch)Figure 4-1 DSG Package TMUX4821 (1:1 2ch)
TMUX4821 TMUX4819 DSG Package TMUX4819 (2:1 1ch)Figure 4-2 DSG Package TMUX4819 (2:1 1ch)
Pin Functions
PIN TYPE(1) DESCRIPTION
NO. TMUX4821 TMUX4819
1 S1 SA I/O Source pin 1 OR A. Can be an input or output.
2 D1 N.C I/O Drain pin 1. Can be an input or output. For N.C. connect pin to GND to keep pin in a known state (Not internally connected).
3 SEL2 EN I Logic control input. Controls the switch connection
4 GND GND GND Ground (0V) reference
5 S2 SB I/O Source pin 2 OR B. Can be an input or output.
6 D2 D I/O Drain pin 2 OR Drain. Can be an input or output.
7 SEL1 SEL I Logic control input. Controls the switch connection.
8 VDD VDD P Positive power supply. This pin is the most positive power-supply potential. For reliable operation, connect a decoupling capacitor ranging from 0.1µF to 10µF between VDD and GND. Controls the switch connection as provided in Table 15-1
Thermal Pad GND GND GND Ground (0V) reference
(1) I = input, I/O = input or output, GND = ground, P = power.