SCES955A September   2023  – September 2026 TXH0137D-Q1

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 Switching Characteristics
    7. 5.7 Typical Characteristics
  7. 6 Detailed Description
    1. 6.1 Overview
    2. 6.2 Functional Block Diagram
    3. 6.3 Feature Description
    4. 6.4 Device Functional Modes
      1. 6.4.1 Resistive Load Drive
      2. 6.4.2 ON State Input Current
      3. 6.4.3 High-Drive Outputs
  8. 7 Application and Implementation
    1. 7.1 Application Information
    2. 7.2 Typical Application
      1. 7.2.1 Design Requirements
      2. 7.2.2 Detailed Design Procedure
        1. 7.2.2.1 TTL and other Logic Inputs
        2. 7.2.2.2 High-Impedance Input Drivers
        3. 7.2.2.3 Output Low Voltage
      3. 7.2.3 Application Curve
    3. 7.3 Power Supply Recommendations
    4. 7.4 Layout
      1. 7.4.1 Layout Guidelines
      2. 7.4.2 Layout Example
      3. 7.4.3 Thermal Considerations
        1. 7.4.3.1 Improving Package Thermal Performance
  9. 8 Device and Documentation Support
    1. 8.1 Receiving Notification of Documentation Updates
    2. 8.2 Support Resources
    3. 8.3 Trademarks
    4. 8.4 Electrostatic Discharge Caution
    5. 8.5 Glossary
  10. 9 Revision History
  11. 10Mechanical, Packaging, and Orderable Information

6.4.1 Resistive Load Drive

When driving a resistive load, a pull-up resistor is needed to limit the current through the pass transistor for a logic level of 210mV to 450mV when the TXH0137D-Q1 is in the low state to about 100mA. To calculate the pull-up resistor value use the following equation.

Equation 1. RPU=(VPU - 0.21 V)0.1 A

where

  • RPU is the pull-up resistor
  • VPU is the pull-up voltage
  • 0.21V is the low logic level voltage
  • 0.1A is the maximum drive strength for the low logic level current

Table 6-1 provides the resistor values, reference voltages and currents at 100mA, 50mA, 25mA, 15mA, and 3mA. The resistor value shown are recommended for typical VOL or less.

Table 6-1 Pull-Up Resistor Values
VPU (V)
  • Pull-Up Resistor Values (Ω) (1)
100mA 50mA 25mA 15mA 3mA
30 V 298 596 1192 1986 9930
24 V 238 476 952 1586 7930
12 V 118 236 472 786 3930
5V 48 96 192 319 1597
3.3V 31 62 124 206 1030
2.5V 23 46 92 153 763
1.8V 16 32 64 106 530
1.5V 13 26 52 86 430
(1) Use +10% to compensate for VPU range and resistor tolerance