SCHS189E January   1998  – October 2022 CD54HC540 , CD54HC541 , CD54HCT541 , CD74HC540 , CD74HC541 , CD74HCT540 , CD74HCT541

PRODUCTION DATA  

  1. Features
  2. Description
  3. Revision History
  4. Pin Configuration and Functions
  5. Specifications
    1. 5.1 Absolute Maximum Ratings
    2. 5.2 Recommended Operating Conditions
    3. 5.3 Thermal Information
    4. 5.4 Electrical Characteristics
    5. 5.5 Switching Characteristics
  6. Parameter Measurement Information
  7. Detailed Description
    1. 7.1 Overview
    2. 7.2 Functional Block Diagram
    3. 7.3 Device Functional Modes
  8. Power Supply Recommendations
  9. Layout
    1. 9.1 Layout Guidelines
  10. 10Device and Documentation Support
    1. 10.1 Receiving Notification of Documentation Updates
    2. 10.2 Support Resources
    3. 10.3 Trademarks
    4. 10.4 Electrostatic Discharge Caution
    5. 10.5 Glossary
  11. 11Mechanical, Packaging, and Orderable Information

Package Options

Refer to the PDF data sheet for device specific package drawings

Mechanical Data (Package|Pins)
  • N|20
  • DW|20
Thermal pad, mechanical data (Package|Pins)
Orderable Information

Description

The ’HC540 and CD74HCT540 are Inverting Octal Buffers and Line Drivers with Three-State Outputs and the capability to drive 15 LSTTL loads. The ’HC541 and ’HCT541 are Noninverting Octal Buffers and Line Drivers with Three-State Outputs that can drive 15 LSTTL loads. The Output Enables (OE1) and (OE2) control the Three-State Outputs. If either OE1 or OE2 is HIGH the outputs will be in the high impedance state. For data output OE1 and OE2 both must be LOW.

Package Information
PART NUMBER PACKAGE(1) BODY SIZE (NOM)
CD74HC540M SOIC (20) 12.80 mm × 7.50 mm
CD74HC540E PDIP (20) 25.40 mm × 6.35 mm
CD54HC540F3A CDIP (20) 26.92 mm × 6.92 mm
CD74HC541M SOIC (20) 12.80 mm × 7.50 mm
CD74HC541E PDIP (20) 25.40 mm × 6.35 mm
CD54HC541F CDIP (20) 26.92 mm × 6.92 mm
CD74HCT540M SOIC (20) 12.80 mm × 7.50 mm
CD74HCT540E PDIP (20) 25.40 mm × 6.35 mm
CD74HCT541M SOIC (20) 12.80 mm × 7.50 mm
CD74HCT541E PDIP (20) 25.40 mm × 6.35 mm
CD54HCT541F CDIP (20) 26.92 mm × 6.92 mm
CD74HCT541PW TSSOP (20) 6.50 mm × 4.40 mm
For all available packages, see the orderable addendum at the end of the data sheet.
GUID-20210908-SS0I-JJH3-SHHB-TD4Z9T9M1LR8-low.pngFunctional Diagram