SCAS790D December   2004  – February 2026 SN74LVC244A-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 Switching Characteristics
    7. 5.7 Operating Characteristics
    8. 5.8 Typical Characteristics
  7. 6 Parameter Measurement Information
  8. 7 Detailed Description
    1. 7.1 Overview
    2. 7.2 Functional Block Diagram
    3. 7.3 Feature Description
      1. 7.3.1 Balanced CMOS 3-State Outputs
      2. 7.3.2 Standard CMOS Inputs
      3. 7.3.3 Clamp Diode Structure
    4. 7.4 Device Functional Modes
  9. 8 Application and Implementation
    1. 8.1 Application Information
    2. 8.2 Typical Application
      1. 8.2.1 Design Requirements
      2. 8.2.2 Detailed Design Procedure
      3. 8.2.3 Application Curves
    3. 8.3 Power Supply Recommendations
    4. 8.4 Layout
      1. 8.4.1 Layout Guidelines
      2. 8.4.2 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

4 Pin Configuration and Functions

SN74LVC244A-Q1 DW, DGS and PW Packages20-Pin SOIC, VSSOP and TSSOPFront ViewFigure 4-1 DW, DGS and PW Packages20-Pin SOIC, VSSOP and TSSOPFront View
SN74LVC244A-Q1 RKS Package20-Pin VQFNTop ViewFigure 4-2 RKS Package20-Pin VQFNTop View
Table 4-1 Pin Functions
PIN TYPE DESCRIPTION
NAME DW, PW, DGS and RKS
1A1 2 I Port 1A1 input
1A2 4 I Port 1A2 input
1A3 6 I Port 1A3 input
1A4 8 I Port 1A4 input
1 OE 1 I Output enable
1Y1 18 O Port 1Y1 output
1Y2 16 O Port 1Y2 output
1Y3 14 O Port 1Y3 output
1Y4 12 O Port 1Y4 output
2A1 11 I Port 2A1 input
2A2 13 I Port 2A2 input
2A3 15 I Port 2A3 input
2A4 17 I Port 2A4 input
2 OE 19 I Output enable
2Y1 9 O Port 2Y1 output
2Y2 7 O Port 2Y2 output
2Y3 5 O Port 2Y3 output
2Y4 3 O Port 2Y4 output
GND 10 — Ground
VCC 20 — Power pin