SCLS094E December   1982  – December 2015 SN54HC74 , SN74HC74

PRODUCTION DATA.  

  1. Features
  2. Applications
  3. Description
  4. Revision History
  5. Pin Configuration and Functions
  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 Requirements
    7. 6.7 Switching Characteristics
    8. 6.8 Typical Characteristics
  7. Parameter Measurement Information
  8. Detailed Description
    1. 8.1 Overview
    2. 8.2 Functional Block Diagram
    3. 8.3 Feature Description
    4. 8.4 Device Functional Modes
  9. Application and Implementation
    1. 9.1 Application Information
    2. 9.2 Typical Application
      1. 9.2.1 Design Requirements
      2. 9.2.2 Detailed Design Procedure
      3. 9.2.3 Application Curve
  10. 10Power Supply Recommendations
  11. 11Layout
    1. 11.1 Layout Guidelines
    2. 11.2 Layout Example
  12. 12Device and Documentation Support
    1. 12.1 Documentation Support
      1. 12.1.1 Related Documentation
    2. 12.2 Related Links
    3. 12.3 Community Resources
    4. 12.4 Trademarks
    5. 12.5 Electrostatic Discharge Caution
    6. 12.6 Glossary
  13. 13Mechanical, Packaging, and Orderable Information

Package Options

Refer to the PDF data sheet for device specific package drawings

Mechanical Data (Package|Pins)
  • D|14
  • DB|14
  • PW|14
  • N|14
  • NS|14
Thermal pad, mechanical data (Package|Pins)
Orderable Information

1 Features

  • Wide Operating Voltage Range: 2 V to 6 V
  • Outputs Can Drive Up To 10 LSTTL Loads
  • Low Power Consumption, 40-µA Maximum ICC
  • Typical tpd = 15 ns
  • ±4-mA Output Drive at 5 V
  • Very Low Input Current of 1 µA

2 Applications

  • Ultrasound System
  • Fans
  • Lab Instrumentation
  • Vacuum Cleaners
  • Video Communications System
  • IP Phone: Wired

3 Description

The SNx4HC74 devices contain two independent D-type positive-edge-triggered flip-flops. A low level at the preset (PRE) or clear (CLR) inputs sets or resets the outputs, regardless of the levels of the other inputs. When PRE and CLR are inactive (high), data at the data (D) input meeting the setup time requirements are transferred to the outputs 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 CLK. Following the hold-time interval, data at the D input can be changed without affecting the levels at the outputs.

Device Information(1)

PART NUMBER PACKAGE BODY SIZE (NOM)
SN74HC74N PDIP (14) 19.30 mm x 6.40 mm
SN74HC74NS SO (14) 10.20 mm x 5.30 mm
SN74HC74D SOIC (14) 8.70 mm x 3.90 mm
SN74HC74DB SSOP (14) 6.50 mm x 5.30 mm
SN74HC74PW TSSOP (14) 5.00 mm x 4.40 mm
SNJ54HC74J CDIP (14) 21.30 mm x 7.60 mm
SNJ54HC74W CFP (14) 9.20 mm x 6.29 mm
SNJ54HC74FK LCCC (20) 8.90 mm x 8.90 mm
  1. For all available packages, see the orderable addendum at the end of the data sheet.

Logic Diagram (Positive Logic)

SN54HC74 SN74HC74 logic_scls094.gif