SBOS288M January   2004  – December 2020 TMP175 , TMP75

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
    7. 6.7 Typical Characteristics
  7. 7 Detailed Description
    1. 7.1 Overview
    2. 7.2 Functional Block Diagram
    3. 7.3 Feature Description
      1. 7.3.1 Digital Temperature Output
      2. 7.3.2 Serial Interface
        1. 7.3.2.1 Bus Overview
        2. 7.3.2.2 Serial Bus Address
        3. 7.3.2.3 Writing and Reading to the TMP175 and TMP75
        4. 7.3.2.4 Slave Mode Operations
          1. 7.3.2.4.1 Slave Receiver Mode
          2. 7.3.2.4.2 Slave Transmitter Mode
        5. 7.3.2.5 SMBus Alert Function
        6. 7.3.2.6 General Call
        7. 7.3.2.7 High-Speed Mode
        8. 7.3.2.8 Time-out Function
      3. 7.3.3 Timing Diagrams
      4. 7.3.4 Two-Wire Timing Diagrams
    4. 7.4 Device Functional Modes
      1. 7.4.1 Shutdown Mode (SD)
      2. 7.4.2 One-shot (OS)
      3. 7.4.3 Thermostat Mode (TM)
      4. 7.4.4 Comparator Mode (TM = 0)
      5. 7.4.5 Interrupt Mode (TM = 1)
    5. 7.5 Programming
      1. 7.5.1 Pointer Register
        1. 7.5.1.1 Pointer Register Byte (pointer = N/A) [reset = 00h]
        2. 7.5.1.2 Pointer Addresses of the TMP175
      2. 7.5.2 Temperature Register
      3. 7.5.3 Configuration Register
        1. 7.5.3.1 Shutdown Mode (SD)
        2. 7.5.3.2 Thermostat Mode (TM)
        3. 7.5.3.3 Polarity (POL)
        4. 7.5.3.4 Fault Queue (F1/F0)
        5. 7.5.3.5 Converter Resolution (R1/R0)
        6. 7.5.3.6 One-Shot (OS)
      4. 7.5.4 High and Low Limit Registers
  8. 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
      3. 8.2.3 Application Curve
  9. 9 Power Supply Recommendations
  10. 10Layout
    1. 10.1 Layout Guidelines
    2. 10.2 Layout Example
  11. 11Device and Documentation Support
    1. 11.1 Receiving Notification of Documentation Updates
    2. 11.2 Support Resources
    3. 11.3 Trademarks
    4. 11.4 Electrostatic Discharge Caution
    5. 11.5 Glossary
  12. 12Mechanical, Packaging, and Orderable Information

Package Options

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

7.3.2.3 Writing and Reading to the TMP175 and TMP75

Accessing a particular register on the TMP175 and TMP75 devices is accomplished by writing the appropriate value to the Pointer register. The value for the Pointer register is the first byte transferred after the slave address byte with the R/W bit low. Every write operation to the TMP175 and TMP75 requires a value for the Pointer register (see Figure 7-2).

When reading from the TMP175 and TMP75 devices, the last value stored in the Pointer register by a write operation is used to determine which register is read by a read operation. To change the register pointer for a read operation, a new value must be written to the Pointer register. This action is accomplished by issuing a slave address byte with the R/ W bit low, followed by the Pointer register byte. No additional data are required. The master can then generate a START condition and send the slave address byte with the R/ W bit high to initiate the read command. See Figure 7-4 for details of this sequence. If repeated reads from the same register are desired, the Pointer register bytes do not have to be continually sent because the TMP175 and TMP75 remember the Pointer register value until the value is changed by the next write operation.

Register bytes are sent MSB first, followed by the LSB.