SCLS251J October   1995  – August 2024 SN54AHC240 , SN74AHC240

PRODMIX  

  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 Noise 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
    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

SN54AHC240 SN74AHC240 SN74AHC240-Q1 PW Package (Top View) Figure 4-1 SN74AHC240-Q1 PW Package (Top View)
PIN TYPE(1) DESCRIPTION
NAME NO.
1OE 1 O Output enable 1
1A1 2 I 1A1 input
2Y4 3 O 2Y4 output
1A2 4 I 1A2 input
2Y3 5 O 2Y3 output
1A3 6 I 1A3 input
2Y2 7 O 2Y2 output
1A4 8 I 1A4 input
2Y1 9 O 2Y1 output
GND 10 G Ground pin
2A1 11 I 2A1 input
1Y4 12 O 1Y4 output
2A2 13 I 2A2 input
1Y3 14 O 1Y3 output
2A3 15 I 2A3 input
1Y2 16 O 1Y2 output
2A4 17 I 2A4 input
1Y1 18 O 1Y1 output
2OE 19 O Output enable 2
VCC 20 P Power pin
(1) Signal Types: I = Input, O = Output, I/O = Input or Output