SCLS128H December   1982  – August 2024 SN54HC240 , SN74HC240

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 Recommended Operating Conditions
    3. 4.3 Thermal Information
    4. 4.4 Electrical Characteristics
    5. 4.5 Switching Characteristics
    6. 4.6 Switching Characteristics
    7. 4.7 Operating Characteristics
  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 Power Supply Recommendations
    2. 7.2 Layout
      1. 7.2.1 Layout Guidelines
  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

3 Pin Configuration and Functions

SN54HC240 SN74HC240 J, W, DB, DGS, DW, N, NS, or PW package20-Pin CDIP, CFP, SSOP. SOIC, PDIP, SO, TSSOP(Top View)J, W, DB, DGS, DW, N, NS, or PW package
20-Pin CDIP, CFP, SSOP. SOIC, PDIP, SO, TSSOP
(Top View)
SN54HC240 SN74HC240 FK package20-Pin LCCC (Top View)FK package
20-Pin LCCC
(Top View)
Table 3-1 Pin Functions
NAME1 PIN TYPE DESCRIPTION
1OE 1 I 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 — 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 I Output enable 2
VCC 20 — Power pin
  1. I = input, O = output, P = power, FB = feedback, GND = ground, N/A = not applicable