STTS751-0WB3F STMicroelectronics

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 UDFN-6L 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 SOT23-6L Low supply current 50 A (typ) for 8 conversions/sec. SMBus 2.0 compatible 20 A (typ) for 1 conversion/sec. SMBus ALERT (ARA) support 3 A (typ) standby SMBus timeout Accuracy RoHS/green 1.0 C (typ) 0 C to +85 C 2.0 C (typ) 40 C to +125 C Applications One-shot mode for power saving Solid state drives Fast conversion time 21 ms (typ) 10-bit Portable electronics Pull-up resistor value allows single pin to select Notebook computers one of four slave addresses Smart batteries Supports 400 kHz serial clock Servers Telecom Table 1. Device summary Order code Pull-up resistor value SMBus address Comments 7.5 K 5% 1001 000 b 12 K 5% 1001 001 b STTS751-0DP3F Address selection via resistor pull-up on Addr/Therm pin STTS751-0WB3F 20 K 5% 0111 000 b 33 K 5% 0111 001 b 7.5 K 5% 1001 010 b 12 K 5% 1001 011 b STTS751-1DP3F Address selection via resistor pull-up on Addr/Therm pin STTS751-1WB3F 20 K 5% 0111 010 b 33 K 5% 0111 011 b July 2010 Doc ID 16483 Rev 5 1/36 www.st.com 1Contents STTS751 Contents 1 Description . 6 2 Functional description . 9 3 SMBus interface . 10 3.1 SMBus protocol 10 3.2 WRITE byte . 11 3.3 READ byte 11 3.4 SEND byte 11 3.5 RECEIVE byte . 11 3.6 SMBus addresses 12 3.7 SMBus timeout . 12 3.8 Alert response address 12 4 STTS751 register summary 13 4.1 STTS751 register formats and details . 14 4.2 Temperature register format . 14 4.3 Temperature limit register format . 15 4.4 Temperature examples . 15 4.5 Status register . 16 4.6 Configuration register 17 4.7 Conversion rate register 18 4.8 One-shot register . 19 4.9 Therm limit 20 4.10 Therm hysteresis . 20 4.11 SMBus timeout register 20 4.12 STTS751 product ID . 21 4.13 STTS751 manufacturers ID 21 4.14 STTS751 revision ID 21 5 EVENT output . 22 2/36 Doc ID 16483 Rev 5