SCLS450H December   1999  – January 2025 SN74LV221A

PRODUCTION DATA  

  1.   1
  2. 1 Features
  3. 2 Description
  4. 3 Pin Configuration and Functions
  5. 4 Specifications
    1. 4.1  Absolute Maximum Ratings
    2. 4.2  ESD Ratings
    3. 4.3  Recommended Operating Conditions
    4. 4.4  Thermal Information
    5. 4.5  Electrical Characteristics
    6. 4.6  Timing Requirements, VCC = 2.5V ± 0.2V
    7. 4.7  Timing Requirements, VCC = 3.3V ± 0.3V
    8. 4.8  Timing Requirements, VCC = 5V ± 0.5V
    9. 4.9  Switching Characteristics, VCC = 2.5V ± 0.2V
    10. 4.10 Switching Characteristics, VCC = 3.3V ± 0.3V
    11. 4.11 Switching Characteristics, VCC = 5V ± 0.5V
    12. 4.12 Operating Characteristics
    13. 4.13 Input/Output Timing Diagram
  6. 5 Parameter Measurement Information
  7. 6 Detailed Description
    1. 6.1 Overview
    2. 6.2 Functional Block Diagram
    3. 6.3 Device Functional Modes
  8. 7 Application and Implementation
    1. 7.1 Application Information
      1. 7.1.1 Caution in Use
      2. 7.1.2 Power-down Considerations
      3. 7.1.3 Output Pulse Duration
    2. 7.2 Power Supply Recommendations
    3. 7.3 Layout
      1. 7.3.1 Layout Guidelines
      2. 7.3.2 Layout Example
  9. 8 Device and Documentation Support
    1. 8.1 Documentation Support
      1. 8.1.1 Related Documentation
    2. 8.2 Receiving Notification of Documentation Updates
    3. 8.3 Support Resources
    4. 8.4 Trademarks
    5. 8.5 Electrostatic Discharge Caution
    6. 8.6 Glossary
  10. 9 Revision History
  11. 10Mechanical, Packaging, and Orderable Information

4.10 Switching Characteristics, VCC = 3.3V ± 0.3V

over recommended operating free-air temperature range, VCC = 3.3V ± 0.3V (unless otherwise noted) (see Load Circuit and Voltage Waveforms)
PARAMETER FROM (INPUT) TO (OUTPUT) TEST CONDITIONS TA = 25°C SN74LV221A UNIT
MIN TYP MAX MIN MAX
tpd A or B Q or Q CL = 15 pF 10.2(1) 20.6(1) 1 24 ns
CLR Q or Q 9.3(1) 15.8(1) 1 18.5
CLR trigger Q or Q 10.6(1) 22.4(1) 1 26
tpd A or B Q or Q CL = 50 pF 11.8 24.1 1 27.5 ns
CLR Q or Q 10.6 19.3 1 22
CLR trigger Q or Q 12.3 25.9 1 29.5
tw (2) Q or Q CL = 50 pF, Cext = 28 pF, Rext = 2 kΩ 186 240 300 ns
CL = 50 pF, Cext = 0.01 µF, Rext = 10 kΩ 90 100 110 90 110 µs
CL = 50 pF, Cext = 0.1 µF, Rext = 10 kΩ 0.9 1 1.1 0.9 1.1 ms
∆tw (3) CL = 50 pF ±1 %
(1) On products compliant to MIL-PRF-38535, this parameter is not production tested.
(2) tw = Pulse duration at Q and Q outputs
(3) ∆tw = Output pulse-duration variation (Q and Q) between circuits in same package