SCASE80A September   2025  – January 2026 TPUL2T323-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 Timing Characteristics
    7.     13
    8. 5.7 Switching Characteristics
    9. 5.8 Typical Characteristics
  7. 6 Parameter Measurement Information
  8. 7 Detailed Description
    1. 7.1 Overview
      1. 7.1.1 State Machine Description
        1. 7.1.1.1 Ready
        2. 7.1.1.2 RC Measurement Cycle
          1. 7.1.1.2.1 Discharge
          2. 7.1.1.2.2 Monitor
          3. 7.1.1.2.3 Timer Count Decision
          4. 7.1.1.2.4 Cycle Count Decision
          5. 7.1.1.2.5 Increment Cycle Counter
          6. 7.1.1.2.6 Reset Timer Counter
          7. 7.1.1.2.7 Save Timer Count
        3. 7.1.1.3 Digital Timer Cycle
          1. 7.1.1.3.1 Reset Timer Counter
          2. 7.1.1.3.2 Delay
          3. 7.1.1.3.3 Increment Cycle Counter
          4. 7.1.1.3.4 Cycle Count Decision
    2. 7.2 Functional Block Diagram
    3. 7.3 Feature Description
      1. 7.3.1  Naming Convention
      2. 7.3.2  Retriggerable One-Shot
      3. 7.3.3  Extended RC Timed One-Shot
      4. 7.3.4  Balanced CMOS Push-Pull Outputs
      5. 7.3.5  CMOS Schmitt-Trigger Inputs
      6. 7.3.6  Latching Logic with Known Power-Up State
      7. 7.3.7  Partial Power Down (Ioff)
      8. 7.3.8  Reduced Input Threshold Voltages
      9. 7.3.9  Wettable Flanks
      10. 7.3.10 Clamp Diode Structure
    4. 7.4 Device Functional Modes
      1. 7.4.1 Off-State Operation
      2. 7.4.2 Startup Operation
      3. 7.4.3 On-State Operation
  9. 8 Application and Implementation
    1. 8.1 Application Information
    2. 8.2 Typical Application - Edge Detector
      1. 8.2.1 Design Requirements
        1. 8.2.1.1 Timing Components
        2. 8.2.1.2 Input Considerations
        3. 8.2.1.3 Output Considerations
        4. 8.2.1.4 Power Considerations
      2. 8.2.2 Detailed Design Procedure
      3. 8.2.3 Application Curves
    3. 8.3 Typical Application - Delayed Pulse Generator
      1. 8.3.1 Application Curves
    4. 8.4 Power Supply Recommendations
    5. 8.5 Layout
      1. 8.5.1 Layout Guidelines
      2. 8.5.2 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

8.2.1.4 Power Considerations

Ensure the desired supply voltage is within the range specified in the Recommended Operating Conditions. The supply voltage sets the electrical characteristics of the device as described in the Electrical Characteristics section.

The positive voltage supply must be capable of sourcing current equal to the total current to be sourced by all outputs of the TPUL2T323-Q1 plus the maximum supply current, ICC, listed in the Electrical Characteristics, and any transient current required for switching. The logic device can only source as much current as is provided by the positive supply source. Ensure the maximum total current through VCC listed in the Absolute Maximum Ratings is not exceeded.

TPUL2T323-Q1 Active state power consumption modes for small RC valuesFigure 8-3 Active state power consumption modes for small RC values
TPUL2T323-Q1 Active state power consumption modes for large RC valuesFigure 8-4 Active state power consumption modes for large RC values

The TPUL2T323-Q1 has four different modes of operation that affect the power consumption of the device which are shown in Figure 8-3 and Figure 8-4. ICC values are separated for the separate modes in the Electrical Characteristics to allow for more accurate active-state power consumption calculation.

For K×R×C ≤ 400µs, the 10MHz oscillator is used to sample the RC timing and to count the remaining 1023 cycles. While measuring the external RC value, the internal analog comparator is enabled, resulting in some additional power consumption. Once the RC value measurement is complete, the internal analog comparator is disabled and only the 10MHz oscillator remains enabled.

For K×R×C > 400µs, the 10MHz oscillator is turned off after the first RC measurement cycle. The 1MHz oscillator is then activated for up to 13 additional RC measurement cycles, with each cycle using a higher value of frequency division from the 1MHz oscillator to support sequentially longer pulse widths. While measuring, the internal analog comparator is enabled, resulting in some additional power consumption. Once the RC measurement cycles are complete, the internal analog comparator is disabled and only the 1MHz oscillator remains enabled.

After the RC measurement is complete, the external capacitor is quickly recharged to VCC using the supply with maximum current draw as described by ICext(max) in the Electrical Characteristics. Additionally, the external timing circuitry will draw power from the supply with a maximum current draw of Iext(max) = VCC / Rext, which is pulled directly from the supply and thus is not part of the ICC value for the TPUL2T323-Q1. The dynamic power consumption from the external circuit can be estimated by PRC = N Cext VCC2 / (Rext Cext), with N being the number of required measurement cycles.

The ground must be capable of sinking current equal to the total current to be sunk by all outputs of the TPUL2T323-Q1 plus the maximum supply current, ICC, listed in the Electrical Characteristics, and any transient current required for switching. The logic device can only sink as much current that can be sunk into its ground connection. Ensure the maximum total current through GND listed in the Absolute Maximum Ratings is not exceeded.

Thermal increase can be calculated using the information provided in Thermal Characteristics of Standard Linear and Logic (SLL) Packages and Devices.

CAUTION: The maximum junction temperature, TJ(max) listed in the Absolute Maximum Ratings, is an additional limitation to prevent damage to the device. Do not violate any values listed in the Absolute Maximum Ratings. These limits are provided to prevent damage to the device.