SLIS117C August   2007  – May 2022 TPIC1021A-Q1

PRODUCTION DATA  

  1. 1 Features
  2. 2 Applications
  3. 3 Description
  4. 4 Revision History
  5. 5 Description (continued)
  6. 6 Device Comparison Table
  7. 7 Pin Configuration and Functions
  8. 8 Specifications
    1. 8.1 Absolute Maximum Ratings
    2. 8.2 ESD Ratings
    3. 8.3 Recommended Operating Conditions
    4. 8.4 Thermal Information
    5. 8.5 Electrical Characteristics
    6. 8.6 Typical Characteristics
  9. 9 Parameter Measurement Information
    1. 9.1 Test Circuit
  10. 10Detailed Description
    1. 10.1 Overview
    2. 10.2 Functional Block Diagram
    3. 10.3 Feature Description
      1. 10.3.1 Local Interconnect Network (LIN) Bus
        1. 10.3.1.1 Transmitter Characteristics
        2. 10.3.1.2 Receiver Characteristics
      2. 10.3.2 Transmit Input (TXD)
        1. 10.3.2.1 TXD Dominant State Time-Out
      3. 10.3.3 Receive Output (RXD)
        1. 10.3.3.1 RXD Wake-up Request
      4. 10.3.4 Supply Voltage (VSUP)
      5. 10.3.5 Ground (GND)
      6. 10.3.6 Enable Input (EN)
      7. 10.3.7 NWake Input (NWake)
      8. 10.3.8 Inhibit Output (INH)
    4. 10.4 Device Functional Modes
      1. 10.4.1 Operating States
        1. 10.4.1.1 Normal Mode
        2. 10.4.1.2 Sleep Mode
          1. 10.4.1.2.1 Wake-Up Events
        3. 10.4.1.3 Standby Mode
  11. 11Application and Implementation
    1. 11.1 Application Information
    2. 11.2 Typical Application
      1. 11.2.1 Design Requirements
      2. 11.2.2 Detailed Design Procedure
      3. 11.2.3 Application Curves
    3. 11.3 Power Supply Recommendations
    4. 11.4 Layout
      1. 11.4.1 Layout Guidelines
      2. 11.4.2 Layout Example
  12. 12Device and Documentation Support
    1. 12.1 Receiving Notification of Documentation Updates
    2. 12.2 Support Resources
    3. 12.3 Trademarks
    4. 12.4 Electrostatic Discharge Caution
    5. 12.5 Glossary
  13. 13Mechanical, Packaging, and Orderable Information

Package Options

Mechanical Data (Package|Pins)
Thermal pad, mechanical data (Package|Pins)
Orderable Information

10.4.1.2 Sleep Mode

Sleep mode is the power saving mode for the TPIC1021A and the default state after power up (assuming EN is low during power up). Even with the extremely low current consumption in this mode, the TPIC1021A can still wake up from LIN bus through a wake-up signal, a low on NWake, or if EN is set high. The LIN bus and NWake are filtered to prevent false wake-up events. The wake-up events must be active for their respective time periods (tLINBUS, tNWake).

The sleep mode is entered by setting EN low.

While the device is in sleep mode, the following conditions exist:

  • The LIN bus driver is disabled and the internal LIN bus termination is switched off (to minimize power loss if LIN is short circuited to ground). However, the weak current pullup is active to prevent false wake-up events in case an external connection to the LIN bus is lost.
  • The normal receiver is disabled.
  • INH is high impedance.
  • EN input, NWake input, and the LIN wake-up receiver are active.