STDS75M2E STMicroelectronics, STDS75M2E Datasheet - Page 12

• Manufacturer Part Number: STDS75M2E
• Description: IC TEMP SENSOR DIGITAL SO-8
• Manufacturer: STMicroelectronics

Specifications of STDS75M2E

• Function: Temp Sensor, Watchdog
• Topology: ADC (Sigma Delta), Comparator, Register Bank
• Sensor Type: Internal
• Sensing Temperature: -55°C ~ 125°C
• Output Type: I²C™/SMBus™
• Output Alarm: Yes
• Output Fan: No
• Voltage - Supply: 2.7 V ~ 5.5 V
• Operating Temperature: -55°C ~ 125°C
• Mounting Type: Surface Mount
• Package / Case: 8-SOIC (3.9mm Width)
• Full Temp Accuracy: +/- 3 C
• Digital Output - Bus Interface: Serial (2-Wire, I2C)
• Digital Output - Number Of Bits: 12 bit
• Maximum Operating Temperature: + 125 C
• Minimum Operating Temperature: - 55 C
• Ic Output Type: Digital
• Sensing Accuracy Range: ± 0.5°C
• Temperature Sensing Range: -55°C To +125°C
• Supply Current: 125µA
• Supply Voltage Range: 2.7V To 5.5V
• Sensor Case Style: SOIC
• No. Of Pins: 8
• Rohs Compliant: Yes
• For Use With: 497-6238 - BOARD STLM75/STDS75/ST72F651
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Operation
2.2
2.3
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Thermal alarm function
The STDS75 thermal alarm function provides user-programmable thermostat capability and
allows the STDS75 to function as a standalone thermostat without using the serial interface.
The OS/INT output is the alarm output. This signal is an open drain output, and at power-up,
this pin is configured with active-low polarity by default.
Comparator mode
In comparator mode, each time a temperature-to-digital (T-to-D) temperature conversion
occurs, the new digital temperature is compared to the value stored in the T
registers. If a fault tolerance number of consecutive temperature measurements are greater
than the value stored in the T
For example, if the FT1 and FT0 bits are equal to “10” (fault tolerance = 4), four consecutive
temperature measurements must exceed T
OS/INT output is active, it will remain active until the first time the measured temperature
drops below the temperature stored in the T
When the thermostat is in comparator mode, the OS/INT can be programmed to operate
with any amount of hysteresis. The OS/INT output becomes active when the measured
temperature exceeds the T
and FT0 fault tolerance (FT) bits in the configuration register. The OS/INT then stays active
until the first time the temperature falls below the value stored in T
into shutdown mode does not clear OS/INT in comparator mode.
OS
OS
value a consecutive number of times as defined by the FT1
Doc ID 13297 Rev 8
register, the OS/INT output will be activated.
OS
HYS
to activate the OS/INT output. Once the
register.
HYS
. Putting the device
OS
and T
STDS75
HYS