STTS751:
High-accuracy 2.25 V digital temperature sensor with dual alarm

Funtional block diagram



STTS751 is a low-voltage, high-precision digital temperature sensor that allows the system designer to configure each part type with up to 4 unique slave addresses. The STTS751 is available in two different part types: STTS751-0 and STTS751-1. Each part type can be configured to provide the system engineer with 4 distinct slave addresses. The two part types can be combined to generate 8 distinct slave addresses enabling a master to control up to 8 devices on the same SMBus or I2C bus. This feature is enabled by connecting any one of 4 pull-up resistors (with unique values as specified in the datasheet) between the dual function address (Addr/Therm) pin and the power supply (Vdd) pin. In applications which require a single slave address, the Addr/Therm pin may be connected directly to the ground (GND) pin, saving the use of a resistor.

Important features

Dual alarm: This enables your application to send an interrupt to the master (a microcontroller) and also an over-temperature alarm signal to a fan driver or a LED.

One-shot mode: This energy saving feature enables your application to wake the STTS751 up from a sleep mode, so that it can measure and record the temperature and read it. The part can then be put back to sleep, thus saving power. Operating the device in this mode allows for very low average power consumption.

SMBus clock low timeout: This is a safety feature which prevents a slave from locking up the bus. This is not available on buses which are only I²C compliant.


STTS751 system implementation