SCASE82 January   2026 TPUL2T122-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 Thermal Information
    4. 5.4 Electrical Characteristics
    5. 5.5 Recommended Operating Conditions
    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
    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 Timing Mechanism and Accuracy
      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 Reduced Input Threshold Voltages
      8. 7.3.8 Wettable Flanks
      9. 7.3.9 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

3 Description

The TPUL2T122x-Q1 devices contain two independent RC configurable retriggerable monostable multivibrators designed for operation from 1.5V to 5.5V. The output pulse duration is configured by selecting external resistance and capacitance values with an approximate output pulse width of two ≅ R × C.

The TPUL2T122x-Q1 devices feature two trigger inputs, allowing for rising edge (T) and falling edge (T) triggers. Each channel also includes a clear input (CLR) that can be used asynchronously to stop an active output pulse. All inputs include Schmitt-trigger architecture to allow for slow input transition rates and improve noise immunity.

Package Information
PART NUMBER PACKAGE(1) PACKAGE SIZE(2) BODY SIZE
TPUL2T122-Q1 BQB
(WQFN, 16)		 3.5mm × 2.5mm 3.5mm × 2.5mm
D
(SOIC, 16)		 9.9mm × 6mm 9.9mm × 3.9mm
PW
(TSSOP, 16)		 5mm × 6.4mm 5mm × 4.4mm
TPUL2T122A-Q1 BQB
(WQFN, 16)		 3.5mm × 2.5mm 3.5mm × 2.5mm
D
(SOIC, 16)		 9.9mm × 6mm 9.9mm × 3.9mm
PW
(TSSOP, 16)		 5mm × 6.4mm 5mm × 4.4mm
(1) For all available packages, see the orderable addendum at the end of the data sheet.
(2) The package size (length × width) is a nominal value and includes pins, where applicable.
Device Information
PART NUMBER PINOUT FUNCTIONALLY MATCHING LEGACY DEVICE
TPUL2T122-Q1 Standard CD74HC423
TPUL2T122A-Q1 Alternate CD74HC4538
TPUL2T122-Q1 TPUL2T122A-Q1 TPUL Family Naming Convention TPUL Family Naming Convention