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PDF STTS751 Data sheet ( Hoja de datos )
| Número de pieza | STTS751 | |
| Descripción | 2.25 V low-voltage local digital temperature sensor | |
| Fabricantes | STMicroelectronics | |
| Logotipo |  |
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STTS751
2.25 V low-voltage local digital temperature sensor
Features
■ Operating voltage 2.25 V to 3.6 V
■ Operating temperature –40 °C to +125 °C
■ Programmable
– 10 different conversion rates
0.0625 to 32 conversions/sec.
1 conversion/sec. - default
– 4 different resolutions
9-bit (0.5 °C/LSB) to12-bit (0.0625 °C/LSB)
10-bit (0.25 °C/LSB) - default
■ Low supply current
– 50 µA (typ) for 8 conversions/sec.
– 20 µA (typ) for 1 conversion/sec.
– 3 µA (typ) standby
■ Accuracy
– ±1.0 °C (typ) 0 °C to +85 °C
– ±2.0 °C (typ) –40 °C to +125 °C
■ One-shot mode for power saving
■ Fast conversion time 21 ms (typ) 10-bit
■ Pull-up resistor value allows single pin to select
one of four slave addresses
■ Supports 400 kHz serial clock
UDFN-6L
SOT23-6L
■ SMBus 2.0 compatible
– SMBus ALERT (ARA) support
– SMBus timeout
■ RoHS/green
Applications
■ Solid state drives
■ Portable electronics
■ Notebook computers
■ Smart batteries
■ Servers
■ Telecom
Table 1. Device summary
Order code Pull-up resistor value
STTS751-0DP3F
STTS751-0WB3F
STTS751-1DP3F
www.DataSShTeTeSt47U51.c-o1mWB3F
7.5 K ±5%
12 K ±5%
20 K ±5%
33 K ±5%
7.5 K ±5%
12 K ±5%
20 K ±5%
33 K ±5%
SMBus address
1001 000 b
1001 001 b
0111 000 b
0111 001 b
1001 010 b
1001 011 b
0111 010 b
0111 011 b
Comments
Address selection via resistor pull-up
on Addr/Therm pin
Address selection via resistor pull-up
on Addr/Therm pin
July 2010
Doc ID 16483 Rev 5
1/36
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1 page  
STTS751
List of figures
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.
Logic diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Pinout - SOT23-6L and UDFN-6L. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Application hardware hookup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
SMBus timing diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
EVENT output . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Therm output . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
AC measurement I/O waveform . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
UDFN-6L (2 mm x 2 mm x 0.5 mm) package mechanical drawing . . . . . . . . . . . . . . . . . . 29
SOT23-6L (2.90 mm x 2.80 mm) package mechanical drawing. . . . . . . . . . . . . . . . . . . . . 30
UDFN-6L package footprint . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
SOT23-6L package footprint. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
Carrier tape for UDFN-6L and SOT23-6L packages. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
Reel schematic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
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Doc ID 16483 Rev 5
5/36
5 Page 
STTS751
SMBus interface
3.2 WRITE byte
The WRITE byte protocol is used to write one byte of data to the registers as shown in
Table 4. The gray data is sent by the STTS751 while the white data is sent by the host.
Table 4. SMBus WRITE byte protocol
Start
Slave address
WR
ACK
Register
address
ACK
Data
ACK
Stop
1 bit
7 bits
1 bit 1 bit
8 bits
1 bit 8 bits
1 bit
1 bit
3.3 READ byte
The READ byte protocol is used to read one byte of data from the registers as shown in
Table 5.
Table 5. SMBus READ byte protocol
Start Slave address WR ACK
Register
address
1 bit
7 bits
1 bit 1 bit 8 bits
ACK Start Slave address RD ACK
1 bit 1 bit
7 bits
1 bit 1 bit
Data
8 bits
NACK Stop
1 bit 1 bit
3.4 SEND byte
The SEND byte protocol is used to set the internal address register to the correct address. It
sends a register address with no data (see Table 6). The SEND byte can be followed by the
RECEIVE byte protocol described below in order to read data from the register.
Table 6.
Start
1 bit
SMBus SEND byte protocol
Slave address
WR
7 bits
1 bit
ACK
1 bit
Register address
8 bits
ACK
1 bit
Stop
1 bit
3.5 RECEIVE byte
The RECEIVE byte protocol is used to read data from the register when the internal register
address pointer is known (see Table 7). This can be used for consecutive reads of the same
register.
Table 7.
Start
1 bit
SMBus RECEIVE byte protocol
Slave address
RD
7 bits
1 bit
ACK
1 bit
Data
8 bits
NACK
1 bit
Stop
1 bit
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| Páginas | Total 36 Páginas | |
| PDF Descargar | [ Datasheet STTS751.PDF ] | |
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