STCN75M2E STMicroelectronics, STCN75M2E Datasheet - Page 18

• 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

Functional description
3.1.5
3.2
Note:
18/37
Hysteresis temperature register (T
T
programmable lower trip-point temperature for the thermal alarm in two’s complement
format (see
(i.e., 0100 1011 0000 0000).
The format of this register is the same as that of the temperature register. The MSB position
contains the sign bit for the digital temperature and bit 14 contains the temperature MSB.
Table 8.
1. These are comparable formats to the DS75 and LM75.
Power-up default conditions
The STCN75 always powers up in the following default states:
●
●
●
●
●
●
After power-up these conditions can be reprogrammed via the serial interface.
STCN75
HYS
Bytes
Bits
Keys: S = two’s complement sign bit
Thermostat mode = comparator mode
Polarity = active-low
Fault tolerance = 1 fault (i.e., relevant bits set to '0' in the configuration register)
T
T
Register pointer = 00 (temperature register)
register is a two-byte (16-bit) READ/WRITE register that stores the user-
OS
HYS
= 80 °C
TMSB = temperature MSB
TLSB = temperature LSB
TD = temperature Data
MSB
= 75 °C
15
Table
S
T
OS
and T
TMSB
8). This register defaults to 75 °C at power-up
14
HYS
TD TD TD TD TD TD
13
HS byte
register format
Doc ID 13307 Rev 8
12
TMSB
11
10
(1)
HYS
9
)
8
TLSB
9-bit
7
6
0
5
0
TLSB
LS byte
4
0
3
0
2
0
STCN75
1
0
LSB
0
0