SCAS961A November   2023  – March 2024 SN74AC7541

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 Typical Characteristics
  7. 6 Detailed Description
    1. 6.1 Overview
    2. 6.2 Functional Block Diagram
    3. 6.3 Feature Description
      1. 6.3.1 Open-Drain CMOS Outputs
      2. 6.3.2 Standard CMOS Inputs
      3. 6.3.3 Clamp Diode Structure
    4. 6.4 Device Functional Modes
  8. 7 Application and Implementation
    1. 7.1 Application Information
    2. 7.2 Typical Application
    3. 7.3 Design Requirements
      1. 7.3.1 Power Considerations
      2. 7.3.2 Input Considerations
      3. 7.3.3 Output Considerations
    4. 7.4 Detailed Design Procedure
    5. 7.5 Application Curves
    6. 7.6 Power Supply Recommendations
    7. 7.7 Layout
      1. 7.7.1 Layout Guidelines
      2. 7.7.2 Layout Example
  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

Package Options

Refer to the PDF data sheet for device specific package drawings

Mechanical Data (Package|Pins)
  • RKS|20
  • DGS|20
  • PW|20
Thermal pad, mechanical data (Package|Pins)
Orderable Information

7.1 Application Information

Open-drain outputs like those available in the SN74AC7541 provide the ability to discharge a voltage node to ground without otherwise loading the node significantly. It is recommended to add a series resistor between the output and any capacitance larger than 50pF as shown in the Typical Application Block Diagram to prevent damage to the device.

The required resistor value can be determined using the maximum capacitor voltage and the maximum continuous current for the output from the equation: R ≥ VC/IO(max).

For any given RC combination, the discharge time can be determined using the discharge plot provided in the Application Timing Diagram and the equation τ = R × C. For example, to discharge a capacitor to 10% of the starting value, it takes approximately 2.303 × τ = 2.303 × R × C seconds.