SBOS891C October   2018  – September 2023 TMP144

PRODUCTION DATA  

  1.   1
  2. 1 Features
  3. 2 Applications
  4. 3 Description
  5. 4 Revision History
  6. 5 Pin Configuration and Functions
  7. 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 UART Interface Timing
    7. 6.7 Timing Diagrams
    8. 6.8 Typical Characteristics
  8. 7 Detailed Description
    1. 7.1 Overview
    2. 7.2 Functional Block Diagram
    3. 7.3 Feature Description
      1. 7.3.1 Power Up
      2. 7.3.2 Digital Temperature Output
      3. 7.3.3 Timeout Function
    4. 7.4 Device Functional Modes
      1. 7.4.1 Continuous Conversion Mode
      2. 7.4.2 Shutdown Mode
      3. 7.4.3 One-Shot Mode
      4. 7.4.4 Extended Temperature Mode
      5. 7.4.5 Temperature Alert Function
      6. 7.4.6 Interrupt Functionality
    5. 7.5 SMAART Wire / UART Interface
      1. 7.5.1 Communication Protocol
      2. 7.5.2 Global Software Reset
      3. 7.5.3 Global Initialization and Address Assignment Sequence
      4. 7.5.4 Global Clear Interrupt
      5. 7.5.5 Global Read and Write
      6. 7.5.6 Individual Read and Write
    6. 7.6 Register Maps
      1. 7.6.1 Temperature Result Register (P[1:0] = 00) [reset = 0000h]
      2. 7.6.2 Configuration Register (P[1:0] = 01) [reset = 0200h]
      3. 7.6.3 Temperature Low Limit Register (P[1:0] = 10) [reset = F600h]
      4. 7.6.4 Temperature High Limit Register (P[1:0] = 11) [reset = 3C00h]
  9. 8 Application and Implementation
    1. 8.1 Application Information
    2. 8.2 Typical Application
      1. 8.2.1 Design Requirements
      2. 8.2.2 Detailed Design Procedure
        1. 8.2.2.1 Trace Length
        2. 8.2.2.2 Voltage Drop Effect
        3. 8.2.2.3 Power Supply Noise Filtering
      3. 8.2.3 Application Curves
    3. 8.3 Power Supply Recommendations
    4. 8.4 Layout
      1. 8.4.1 Layout Guidelines
      2. 8.4.2 Layout Example
  10. 9 Device and Documentation Support
    1. 9.1 Device Support
      1. 9.1.1 Device Nomenclature
    2. 9.2 Receiving Notification of Documentation Updates
    3. 9.3 Support Resources
    4. 9.4 Trademarks
    5. 9.5 Electrostatic Discharge Caution
    6. 9.6 Glossary
  11. 10Mechanical, Packaging, and Orderable Information

Package Options

Refer to the PDF data sheet for device specific package drawings

Mechanical Data (Package|Pins)
  • YBK|4
  • YFF|4
  • YMT|4
Thermal pad, mechanical data (Package|Pins)
Orderable Information

7.5 SMAART Wire / UART Interface

The TMP144 uses a TI proprietary, one-wire UART-compatible communication protocol called SMAART Wire™. The TMP144 has two dedicated pins for communication:TX and RX. Usually, these two pins are connected internally and the signal on the RX propagates to the TX, unless the device must send data on the bus or during address assignment and alert procedures.

The interface has built-in timeouts (typically 28 ms) that return the interface to a known state if communication is disrupted.