SLVSNS8 September   2026 TMUXS1306A

ADVANCE INFORMATION  

  1.   1
  2. 1 Features
  3. 2 Applications
  4. 3 Description
  5. 4 Device Comparison Table
  6. 5 Pin Configuration and Functions
  7. 6 Specifications
    1. 6.1  Absolute Maximum Ratings
    2. 6.2  ESD Ratings
    3. 6.3  Recommended Operating Conditions
    4. 6.4  Thermal Information: TMUXS1306A
    5. 6.5  Thermal Information: TMUXS1307A
    6. 6.6  Electrical Characteristics
    7. 6.7  Logic and Dynamic Characteristics
    8. 6.8  Timing Characteristics
    9. 6.9  Injection Current Coupling
    10. 6.10 SPI Timing Characteristics (5.5V)
    11. 6.11 SPI Timing Characteristics (3.3V)
    12. 6.12 SPI Timing Characteristics (2.7V)
    13. 6.13 SPI Timing Characteristics (1.8V)
  8. 7 Parameter Measurement Information
    1. 7.1  On-Resistance
    2. 7.2  Off-Leakage Current
    3. 7.3  On-Leakage Current
    4. 7.4  Transition Time
    5. 7.5  Break-Before-Make
    6. 7.6  tON(EN) and tOFF(EN)
    7. 7.7  Charge Injection
    8. 7.8  Off Isolation
    9. 7.9  Crosstalk
    10. 7.10 Bandwidth
    11. 7.11 Injection Current Control
  9. 8 Detailed Description
    1. 8.1 Overview
    2. 8.2 Functional Block Diagram
    3. 8.3 Feature Description
      1. 8.3.1 Bidirectional Operation
      2. 8.3.2 Rail-to-Rail Operation
      3. 8.3.3 1.8V Logic Compatible Inputs
      4. 8.3.4 Fail-Safe Logic
      5. 8.3.5 Injection Current Control
    4. 8.4 Device Functional Modes
      1. 8.4.1 SPI Operation
        1. 8.4.1.1 Auto Cycle Mode
        2. 8.4.1.2 Address Mode
        3. 8.4.1.3 Burst Mode
        4. 8.4.1.4 Daisy Chain Mode
        5. 8.4.1.5 Software Reset
  10. 9  TMUXS1306A Register Map
  11. 10 TMUXS1307A Register Map
  12. 11Application and Implementation
    1. 11.1 Application Information
    2. 11.2 Typical Application
      1. 11.2.1 Design Requirements
      2. 11.2.2 Detailed Design Procedure
    3. 11.3 Power Supply Recommendations
    4. 11.4 Layout
      1. 11.4.1 Layout Guidelines
      2. 11.4.2 Layout Example
  13. 12Device and Documentation Support
    1. 12.1 Documentation Support
      1. 12.1.1 Related Documentation
    2. 12.2 Receiving Notification of Documentation Updates
    3. 12.3 Support Resources
    4. 12.4 Trademarks
    5. 12.5 Electrostatic Discharge Caution
    6. 12.6 Glossary
  14. 13Revision History
  15. 14Mechanical, Packaging, and Orderable Information
    1. 14.1 Tape and Reel Information
    2. 14.2 Mechanical Data

8.4.1.1 Auto Cycle Mode

The default state of TMUXS130xA is auto cycle (AC) mode. While in auto cycle mode, the device automatically toggles from SWn to SWn+1with TMUXS1306A and then SWnA to SWnA+1 of channel 1 and SWnB to SWnB+1 for TMUXS1307A on the rising edge of the signal provided to the AC pin. While in auto cycle mode, the only register that can be written to is the MODCFG register; however, all registers can be read from. To leave AC mode, the user must change the first bit in register 0x0C to 0. Burst mode can also be enabled while exiting AC mode, and during the burst write AC mode can be re-enabled, and burst mode disabled.

A full cycle of auto cycle mode is considered a "Pattern". A pattern can consist of a "1" that indicates a switch is active, or a "0" which indicates a switch is inactive. For example, 0xFFFF indicates every switch is active and transitioned to in the pattern, but 0x0005 means only switches 0 and 2 are active and are cycled through with only two active edges on the AC pin.

There are eight pattern registers (0x04xx through 0x0Bxx). Each pattern register can be overwritten with custom patterns. During a device power down all registers are reset to the default states.

The ACSEL register allows the user to select multiple patterns to cycle through. For example, if a user selects patterns 0 and 1 (ACSEL = 0x0003, Pattern0 = 0xFFFF and Pattern1 = 0xAAAA) then the switches run through 0xFFFF followed by 0xAAAA, and then back to 0xFFFF.

There are multiple options in the MODCFG register that helps with the configurability of AC mode. To modify this register, the AC mode must be disabled first.

AC_1CH_ALWAYS_ON turns off all switches at the end of every pattern, requiring an additional AC to begin the next pattern. To get through a full pattern with AC_1CH_ALWAYS_ON, 16 rising edges are required, or 17 with AC_1CH_ALWAYS_ON disabled.

AC_EDGE_CONFIG sets what edge the switches transition on.

  1. 0b00: sets the AC to transition on rising edge only
  2. 0b01: sets AC to transition on falling edge only
  3. 0b10: sets AC to transition on both rising edge AND falling edge
  4. 0b11: sets AC to transition on rising edge only (repeat of 0b00)