STCN75DS2F datasheet, PDF - EEWORLD Datasheet

STCN75DS2F: DescriptionTemp Sensor Digital Serial (2-Wire, I2C, SMBus) 8-Pin MSOP T/R; File Size391KB，36 Pages; ManufacturerSTMicroelectronics; Websitehttp://www.st.com/; Environmental Compliance

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STCN75DS2F Overview

Temp Sensor Digital Serial (2-Wire, I2C, SMBus) 8-Pin MSOP T/R

STCN75DS2F Parametric

Parameter Name	Attribute value
EU restricts the use of certain hazardous substances	Compliant
ECCN (US)	EAR99
Part Status	Active
HTS	8542.39.00.01
Module/IC Classification	IC
Resolution (bit)	9
Accuracy	±3°C(Max)
Interface Type	Serial (2-Wire, I2C, SMBus)
Output Type	Digital
Minimum Operating Supply Voltage (V)	2.7
Typical Operating Supply Voltage (V)	5\|3.3
Maximum Operating Supply Voltage (V)	5.5
Maximum Supply Current (uA)	150
Maximum Power Dissipation (mW)	320
Minimum Operating Temperature (°C)	-55
Maximum Operating Temperature (°C)	125
Packaging	Tape and Reel
Supplier Package	MSOP
Pin Count	8
Standard Package Name	MSOP
Mounting	Surface Mount
Package Height	0.85
Package Length	3
Package Width	3
PCB changed	8
Lead Shape	Gull-wing

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STCN75

Digital temperature sensor and thermal watchdog

Datasheet

−

production data

Features

■

Measures temperatures from –55 °C to

+125 °C (–67 °F to +257 °F)

–

0.5

C (typ) accuracy

–

C (max) accuracy from

–

C to

+100

Low operating current:125 µA (typ)

No external components required

2-wire I

C/SMBus-compatible serial interface

– Selectable bus address allows connection

of up to eight devices on the bus

Wide power supply range - operating voltage

range: 2.7 V to 5.5 V

Conversion time is 45 ms (typ)

Programmable temperature threshold and

hysteresis set points

Pin- and software-compatible with TCN75

(drop-in replacement)

Power-up defaults permit standalone operation

as a thermostat

Shutdown mode to minimize power

consumption

Output pin (open drain) can be configured for

interrupt or comparator/thermostat mode (dual

purpose event pin)

MSOP8 (TSSOP8) package

MSOP8

(TSSOP8)

■

March 2012

This is information on a product in full production.

Doc ID 13307 Rev 9

1/36

www.st.com

Contents

STCN75

Contents

Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

1.1

1.2

1.3

Serial communications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

Temperature sensor output . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

Pin descriptions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

1.3.1

1.3.2

1.3.3

1.3.4

1.3.5

1.3.6

SDA (open drain) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

SCL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

OS/INT (open drain) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

GND . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

A2, A1, A0 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

DD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

2.1

2.2

2.3

2.4

2.5

2.6

2.7

Applications information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

Thermal alarm function . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

Comparator mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

Interrupt mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

Fault tolerance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

Shutdown mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

Temperature data format . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

Functional description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

3.1

Registers and register set formats . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

3.1.1

3.1.2

3.1.3

3.1.4

3.1.5

Command/pointer register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

Configuration register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

Temperature register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

Overlimit temperature register (T

) . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

Hysteresis temperature register (T

HYS

) . . . . . . . . . . . . . . . . . . . . . . . . . 18

3.2

3.3

3.4

Power-up default conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

Serial interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

2-wire bus characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

3.4.1

3.4.2

3.4.3

Bus not busy . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

Start data transfer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

Stop data transfer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

2/36

Doc ID 13307 Rev 9

List of tables

STCN75

List of tables

Table 1.

Table 2.

Table 3.

Table 4.

Table 5.

Table 6.

Table 7.

Table 8.

Table 9.

Table 10.

Table 11.

Table 12.

Table 13.

Table 14.

Table 15.

Table 16.

Table 17.

Table 18.

Signal names . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

Fault tolerance setting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

Relationship between temperature and digital output. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

Command/pointer register format . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

Configuration register format . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

Temperature register format . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

and T

HYS

STCN75 serial bus slave addresses. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

Absolute maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26

Operating and AC measurement conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27

DC and AC characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28

AC characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29

MSOP8 (TSSOP8) – 8-lead, thin shrink small outline (3 mm x 3 mm) package

mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31

Carrier tape dimensions for MSOP8 (TSSOP8) package. . . . . . . . . . . . . . . . . . . . . . . . . . 32

Reel dimensions for 12 mm carrier tape - MSOP8 (TSSOP8) package . . . . . . . . . . . . . . . 33

Ordering information scheme . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34

Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35

4/36

Doc ID 13307 Rev 9

STCN75

List of figures

Figure 1.

Figure 2.

Figure 3.

Figure 4.

Figure 5.

Figure 6.

Figure 7.

Figure 8.

Figure 9.

Figure 10.

Figure 11.

Figure 12.

Figure 13.

Figure 14.

Figure 15.

Figure 16.

Figure 17.

Figure 18.

Logic diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

Functional block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

Typical 2-wire interface connections diagram. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

Serial bus data transfer sequence . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

Acknowledgement sequence . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

Slave address location . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

Typical 2-byte READ from preset pointer location (e.g. temp - T

, T

HYS

) . . . . . . . . . . . . 22

Typical pointer set followed by an immediate READ for 2-byte register (e.g. temp). . . . . . 22

Typical 1-byte READ from the cofiguration register with preset pointer . . . . . . . . . . . . . . . 22

Typical pointer set followed by an immediate READ from the configuration register . . . . . 23

Configuration register WRITE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

and T

HYS

WRITE. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

Temperature variation vs. voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

Bus timing requirements sequence . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29

MSOP8 (TSSOP8) – 8-lead, thin shrink small outline (3 mm x 3 mm) package

mechanical drawing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31

Carrier tape for MSOP8 (TSSOP8) package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32

Reel schematic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33

Doc ID 13307 Rev 9

5/36

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