STCN75M2E STMicroelectronics, STCN75M2E Datasheet - Page 10

• Manufacturer Part Number: STCN75M2E
• Description: IC TEMP SENSOR DIGITAL SO-8
• Manufacturer: STMicroelectronics

Specifications of STCN75M2E

• Featured Product: STM32 Cortex-M3 Companion Products
• 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 (0.154", 3.90mm Width)
• Full Temp Accuracy: +/- 3 C
• Digital Output - Bus Interface: Serial (2-Wire, I2C)
• Digital Output - Number Of Bits: 9 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
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Operation
2
Note:
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Operation
After each temperature measurement and analog-to-digital conversion, the STCN75 stores
the temperature as a 16-bit two’s complement number (see
selection summary on page
The most significant bit (S) indicates if the temperature is positive or negative:
●
●
The most recently converted digital measurement can be read from the temperature register
at any time. Since temperature conversions are performed in the background, reading the
temperature register does not affect the operation in progress.
The temperature data is provided by the 9 MSBs (bits 15 through 7). Bits 6 through 0 are
unused.
temperatures. The data is compared to the values in the T
the OS/INT is updated based on the result of the comparison and the operating mode.
The alarm fault tolerance is controlled by the FT1 and FT0 bits in the configuration register.
They are used to set up a fault queue. This prevents false tripping of the OS/INT pin when
the STCN75 is used in a noisy environment (see
The active state of the OS/INT output can be changed via the polarity bit (POL) in the
configuration register. The power-up default is active-low.
If the user does not wish to use the thermostat capabilities of the STCN75, the
OS/INToutput should be left floating.
If the thermostat is not used, the T
system data.
for positive numbers S = 0, and
for negative numbers S = 1.
Table 3 on page 14
16) in the 2-byte temperature register (see
gives examples of the digital output data and corresponding
Doc ID 13307 Rev 8
OS
and T
HYS
registers can be used for general storage of
Table 2 on page
OS
Table 5: Register pointers
and T
13).
HYS
Table 7 on page
registers, and then
STCN75
17).