SLIS113E October   2004  – May 2022 TPIC1021

PRODUCTION DATA  

  1. 1 Features
  2. 2 Applications
  3. 3 Description
  4. 4 Revision History
  5. 5 Description (continued)
  6. 6 Pin Configuration and Functions
  7. 7 Specifications
    1. 7.1 Absolute Maximum Ratings
    2. 7.2 ESD Ratings
    3. 7.3 Recommended Operating Conditions
    4. 7.4 Thermal Information
    5. 7.5 Electrical Characteristics
    6. 7.6 Timing Requirements
    7. 7.7 Typical Characteristics
  8. 8 Detailed Description
    1. 8.1 Overview
    2. 8.2 Functional Block Diagram
    3. 8.3 Feature Description
      1. 8.3.1 LIN Bus Pin
        1. 8.3.1.1 Transmitter Characteristics
        2. 8.3.1.2 Receiver Characteristics
      2. 8.3.2 Transmit Input Pin (TXD)
        1. 8.3.2.1 TXD Dominant State Timeout
      3. 8.3.3 Receive Output Pin (RXD)
        1. 8.3.3.1 RXD Wake-up Request
      4. 8.3.4 Ground (GND)
      5. 8.3.5 Enable Input Pin (EN)
      6. 8.3.6 NWake Input Pin (NWake)
      7. 8.3.7 Inhibit Output Pin (INH)
    4. 8.4 Device Functional Modes
      1. 8.4.1 Operating States
        1. 8.4.1.1 Normal Mode
        2. 8.4.1.2 Low Power Mode
        3. 8.4.1.3 Wake-Up Events
        4. 8.4.1.4 Standby Mode
      2. 8.4.2 Supply Voltage (VSUP)
  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 Curves
    3. 9.3 Power Supply Recommendations
    4. 9.4 Layout
      1. 9.4.1 Layout Guidelines
      2. 9.4.2 Layout Example
  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)
  • D|8
Thermal pad, mechanical data (Package|Pins)
Orderable Information

9.4.1 Layout Guidelines

  • Pin 1 is the RXD output of the TPIC1021. It is an open drain output and requires an external pull-up resistor in the range of 1 to 10 kΩ to function properly. If the micro-processor paired with the transceiver does not have an integrated pullup and external resistor should be placed between RXD and the regulated voltage supply for the micro-processor.
  • Pin 2 is the EN input pin for the device that is used to place the device in low power sleep mode. If this feature is not used on the device, the pin should be pulled high to the regulated voltage supply of the micro-processor through a series 1-kΩ to 10-kΩ series resistor. Additionally, a series resistor may be placed on the pin to limit the current on the digital lines in the case of an overvoltage fault.
  • Pin 3 is a high-voltage local wake up input pin. The device is typically externally controlled by a normally open switch tied between NWAKE and ground. When the momentary switch is pressed the NWAKE pin is pulled to ground signaling a local wake-up event. A series resistor between VBATT and the switch, and NWAKE and the switch should be placed to limit current. If the NWAKE local wake-up feature is not used, the pin can be tied to VSUP through a 1-kΩ to 10-kΩ pullup resistor.
  • Pin 4 is the transmit input signal to the device. A series resistor can be placed to limit the input current to the device in the case of an overvoltage on this pin. Also a capacitor to ground can be placed close to the input pin of the device to filter noise.
  • Pin 5 is the ground connection of the device. This pin should be tied to a ground plane through a short trace with the use of two vias to limit total return inductance.
  • Pin 6 is the LIN bus connection of the device. For responder applications a 220pF bus capacitor is implemented. For commander applications an additional series resistor and blocking diode should be placed between the LIN pin and the VSUP pin.
  • Pin 7 is the supply pin for the device. A 100-nF decoupling capacitor should be placed as close to the device as possible.
  • Pin 8 is a high-voltage output pin that may be used to control the local power supplies. If this feature is not used the pin may be left floating.
    Note:

    All ground and power connections should be made as short as possible and use at least two vias to minimize the total loop inductance.