SCPS164D MAY   2007  – February 2017 TCA6507

PRODUCTION DATA.  

  1. 1 Features
  2. 2 Applications
  3. 3 Description
  4. 4 Revision History
  5. 5 Pin Configuration and Functions
  6. 6 Specifications
    1. 6.1 Absolute Maximum Ratings
    2. 6.2 ESD Ratings
    3. 6.3 Recommended Operating Conditions
    4. 6.4 Thermal Information
    5. 6.5 Electrical Characteristics
    6. 6.6 I2C Interface Timing Requirements
    7. 6.7 Oscillator Timing Requirements
    8. 6.8 Switching Characteristics
    9. 6.9 Typical Characteristics
  7. 7 Parameter Measurement Information
  8. 8 Detailed Description
    1. 8.1 Overview
    2. 8.2 Functional Block Diagram
    3. 8.3 Feature Description
      1. 8.3.1 Seven LED Driver Outputs
      2. 8.3.2 Open-Drain Outputs Directly Drive LEDs
      3. 8.3.3 Widely Programmable
    4. 8.4 Device Functional Modes
      1. 8.4.1 Power-On Reset
      2. 8.4.2 Enable and Reset
    5. 8.5 Programming
      1. 8.5.1 I2C Interface
      2. 8.5.2 Bus Transactions
        1. 8.5.2.1 Writes
        2. 8.5.2.2 Reads
      3. 8.5.3 Device Address
      4. 8.5.4 Control Register and Command Byte
      5. 8.5.5 Auto-Increment Mode
      6. 8.5.6 LED Operation
      7. 8.5.7 Blinking Pattern Control
      8. 8.5.8 Intensity Control
    6. 8.6 Register Maps
      1. 8.6.1 Registers 0x00 - 0x02 (Select Registers)
      2. 8.6.2 Register 0x03 (Fade-ON Time)
      3. 8.6.3 Register 0x04 (Fully-ON Time)
      4. 8.6.4 Register 0x05 (Fade-OFF Time)
      5. 8.6.5 Register 0x06 - 0x07 (Fully-OFF Time)
      6. 8.6.6 Register 0x08 (Maximum Intensity per Bank)
      7. 8.6.7 Register 0x09 (One-Shot / Master Intensity)
      8. 8.6.8 Register 0x0A (Initialization Register)
  9. 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
      3. 9.2.3 Application Curve
    3. 9.3 System Example
  10. 10Power Supply Recommendations
    1. 10.1 Power-On Reset Requirements
  11. 11Layout
    1. 11.1 Layout Guidelines
    2. 11.2 Layout Example
  12. 12Device and Documentation Support
    1. 12.1 Documentation Support
      1. 12.1.1 Related Documentation
    2. 12.2 Receiving Notification of Documentation Updates
    3. 12.3 Community Resources
    4. 12.4 Trademarks
    5. 12.5 Electrostatic Discharge Caution
    6. 12.6 Glossary
  13. 13Mechanical, Packaging, and Orderable Information

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11 Layout

11.1 Layout Guidelines

For PCB layout of the TCA6507, common PCB layout practices must be followed, but additional concerns related to high-speed data transfer, such as matched impedances and differential pairs, are not a concern for I2C signals speeds. It is common to have a dedicated ground plane on an inner layer of the board, and pins that are connected to ground must have a low-impedance path to the ground plane in the form of wide polygon pours, and multiple vias. By-pass and de-coupling capacitors are commonly used to control the voltage on the VCC pin, using a larger capacitor to provide additional power in the event of a short power supply glitch, and a smaller capacitor to filter out high-frequency ripple.

11.2 Layout Example

TCA6507 LayoutRUE.gif Figure 28. RUE Layout Recommendation