SCLS922 may   2023 SN74LV2T74

PRODUCTION DATA  

  1.   1
  2. 1 Features
  3. 2 Applications
  4. 3 Description
  5. 4 Revision History
  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
    5. 6.5  Electrical Characteristics
    6. 6.6  Timing Characteristics 1.8-V VCC
    7. 6.7  Timing Characteristics 2.5-V VCC
    8. 6.8  Timing Characteristics 3.3-V VCC
    9. 6.9  Timing Characteristics 5-V VCC
    10. 6.10 Switching Characteristics 1.8-V VCC
    11. 6.11 Switching Characteristics 2.5-V VCC
    12. 6.12 Switching Characteristics 3.3-V VCC
    13. 6.13 Switching Characteristics 5-V VCC
    14. 6.14 Noise Characteristics
    15. 6.15 Typical Characteristics
  8. 7 Parameter Measurement Information
  9. 8 Detailed Description
    1. 8.1 Overview
    2. 8.2 Functional Block Diagram
    3. 8.3 Feature Description
      1. 8.3.1 Balanced CMOS 3-State Outputs
      2. 8.3.2 Clamp Diode Structure
      3. 8.3.3 LVxT Enhanced Input Voltage
        1. 8.3.3.1 Down Translation
        2. 8.3.3.2 Up Translation
      4. 8.3.4 Wettable Flanks
    4. 8.4 Device Functional Modes
  10. 9 Application and Implementation
    1. 9.1 Application Information
    2. 9.2 Typical Application
      1. 9.2.1 Design Requirements
        1. 9.2.1.1 Input Considerations
        2. 9.2.1.2 Output Considerations
      2. 9.2.2 Detailed Design Procedure
      3. 9.2.3 Application Curves
  11. 10Power Supply Recommendations
  12. 11Device and Documentation Support
    1. 11.1 Documentation Support
      1. 11.1.1 Related Documentation
    2. 11.2 Receiving Notification of Documentation Updates
    3. 11.3 Support Resources
    4. 11.4 Trademarks
    5. 11.5 Electrostatic Discharge Caution
    6. 11.6 Glossary
  13. 12Mechanical, Packaging, and Orderable Information

Package Options

Mechanical Data (Package|Pins)
Thermal pad, mechanical data (Package|Pins)
Orderable Information

3 Description

The SN74LV2T74 contains two independent D-type positive-edge-triggered flip-flops. A low level at the preset (PRE) input sets the output high. A low level at the clear (CLR) input resets the output low. Preset and clear functions are asynchronous and not dependent on the levels of the other inputs. When PRE and CLR are inactive (high), data at the data (D) input meeting the setup time requirements is transferred to the outputs (Q, Q) on the positive-going edge of the clock (CLK) pulse. Clock triggering occurs at a voltage level and is not directly related to the rise time of the input clock (CLK) signal. Following the hold-time interval, data at the data (D) input can be changed without affecting the levels at the outputs (Q, Q). The output level is referenced to the supply voltage (VCC) and supports 1.8-V, 2.5-V, 3.3-V, and 5-V CMOS levels.

The input is designed with a lower threshold circuit to support up translation for lower voltage CMOS inputs (for example, 1.2 V input to 1.8 V output or 1.8 V input to 3.3 V output). In addition, the 5-V tolerant input pins enable down translation (for example, 3.3 V to 2.5 V output).

Package Information
PART NUMBER PACKAGE(1) PACKAGE SIZE(2) BODY SIZE (NOM)(3)
SN74LV2T74 BQA (WQFN, 14) 3 mm × 2.5 mm 3 mm × 2.5 mm
PW (TSSOP, 14) 5 mm × 6.4 mm 5 mm × 4.4 mm
(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.
(3) The body size (length × width) is a nominal value and does not include pins.
GUID-8DBEF82E-F380-4062-8CC0-605EA0242177-low.gifSimplified Logic Diagram (Positive Logic)