SNAS833B November   2021  – August 2025 CDCDB400

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 Timing Requirements
    7. 5.7 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 Fail-Safe Input
      2. 7.3.2 Output Enable Control
      3. 7.3.3 SMBus
        1. 7.3.3.1 SMBus Address Assignment
    4. 7.4 Device Functional Modes
      1. 7.4.1 CKPWRGD_PD# Function
      2. 7.4.2 OE[3:0]# and SMBus Output Enables
      3. 7.4.3 Output Slew Rate Control
      4. 7.4.4 Output Impedance Control
    5. 7.5 Programming
  9. 8 Register Maps
    1. 8.1 CDCDB400 Registers
  10. 9 Application and Implementation
    1. 9.1 Application Information
    2. 9.2 Typical Application
      1. 9.2.1 Design Requirements
      2. 9.2.2 Detailed Design Procedure
        1. 9.2.2.1 Output Enable Control Method
        2. 9.2.2.2 SMBus Address
      3. 9.2.3 Application Curves
    3. 9.3 Power Supply Recommendations
    4. 9.4 Layout
      1. 9.4.1 Layout Guidelines
      2. 9.4.2 Layout Examples
  11. 10Device and Documentation Support
    1. 10.1 Device Support
      1. 10.1.1 TICS Pro
    2. 10.2 Documentation Support
      1. 10.2.1 Related Documentation
    3. 10.3 Receiving Notification of Documentation Updates
    4. 10.4 Support Resources
    5. 10.5 Trademarks
    6. 10.6 Electrostatic Discharge Caution
    7. 10.7 Glossary
  12. 11Revision History
  13. 12Mechanical, Packaging, and Orderable Information

7.4.4 Output Impedance Control

The integrated termination on the CDCDB400 can be programmed either for 85Ω or 100Ω. This flexibility verifies that the customer can use the same device across various applications irrespective of the characteristic board impedance which is typically either 85Ω or 100Ω. This termination resistor can be changed for all the outputs as whole using bit 5 of a register called OUTSET. Refer to Table 8-11 for more information.