TMP175-Q1, TMP75-Q1

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SBOS759 – NOVEMBER 2015

7.4 Device Functional Modes

7.4.1 Shutdown Mode (SD)

The shutdown mode of the TMP175-Q1 and TMP75-Q1 devices lets the user save maximum power by shutting

down all device circuitry other than the serial interface, thus reducing current consumption to typically less than

0.1

μA. Shutdown mode is enabled when the SD bit is 1; the device shuts down when the current conversion is

completed. When SD is equal to 0, the device maintains a continuous conversion state.

7.4.2 One-Shot (OS)

The TMP175-Q1 and TMP75-Q1 feature a one-shot temperature measurement mode. When the device is in

shutdown mode, writing 1 to the OS bit starts a single temperature conversion. The device returns to the

shutdown state at the completion of the single conversion. This feature is useful to reduce power consumption in

the TMP175-Q1 and TMP75-Q1 when continuous temperature monitoring is not required. When the configuration

register is read, OS always reads zero.

7.4.3 Thermostat Mode (TM)

The thermostat mode bit of the TMP175-Q1 and TMP75-Q1 indicates to the device whether to operate in

comparator mode (TM = 0) or interrupt mode (TM = 1). For more information on comparator and interrupt modes,

see the High- and Low-Limit Registers section.

7.4.3.1 Comparator Mode (TM = 0)

In comparator mode (TM = 0), the ALERT pin is activated when the temperature equals or exceeds the value in

the T(HIGH) register and remains active until the temperature falls below the value in the T(LOW) register. For more

information on the comparator mode, see the High- and Low-Limit Registers section.

7.4.3.2 Interrupt Mode (TM = 1)

In interrupt mode (TM = 1), the ALERT pin is activated when the temperature exceeds T(HIGH) or goes below the

T(LOW) registers. The ALERT pin is cleared when the host controller reads the Temperature register. For more

information on the interrupt mode, see the High- and Low-Limit Registers section.

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Product Folder Links: TMP175-Q1 TMP75-Q1