STTS751-0WB3F STMicroelectronics, STTS751-0WB3F Datasheet
STTS751-0WB3F
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STTS751-0WB3F Summary of contents
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... Pull-up resistor value allows single pin to select one of four slave addresses ■ Supports 400 kHz serial clock Table 1. Device summary Order code Pull-up resistor value 7.5 K ± ±5% STTS751-0DP3F STTS751-0WB3F 20 K ± ±5% 7.5 K ± ±5% STTS751-1DP3F STTS751-1WB3F 20 K ± ±5% July 2010 ■ ...
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... 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 4.13 STTS751 manufacturer’ 4.14 STTS751 revision EVENT output . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22 2/36 Doc ID 16483 Rev 5 STTS751 ...
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... STTS751 6 Addr/Therm output . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23 7 Maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . and AC parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25 9 Package mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28 10 Part numbering . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34 11 Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35 Doc ID 16483 Rev 5 Contents 3/36 ...
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... UDFN- 0.5 mm) package mechanical data . . . . . . . . . . . . . . . . . . . . . 29 Table 31. SOT23-6L (2. 2.80 mm) package mechanical data . . . . . . . . . . . . . . . . . . . . . . . 30 Table 32. Carrier tape dimensions for UDFN-6L and SOT23-6L packages . . . . . . . . . . . . . . . . . . . . 32 Table 33. Reel dimensions for 8 mm carrier tape - UDFN-6L and SOT23-6L packages . . . . . . . . . . 33 Table 34. Ordering information scheme . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34 Table 35. Document revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35 4/36 Doc ID 16483 Rev 5 STTS751 ...
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... STTS751 List of figures Figure 1. Logic diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 Figure 2. Pinout - SOT23-6L and UDFN-6L Figure 3. Block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 Figure 4. Application hardware hookup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 Figure 5. SMBus timing diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 Figure 6. EVENT output . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22 Figure 7. Therm output . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23 Figure 8. AC measurement I/O waveform . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25 Figure 9. UDFN- 0.5 mm) package mechanical drawing . . . . . . . . . . . . . . . . . . 29 Figure 10. ...
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... Description 1 Description The STTS751 is a digital temperature sensor which communicates over a 2-wire SMBus 2.0 compatible bus. The temperature is measured with a user-configurable resolution between 9 and 12 bits bits, the smallest step size is 0.5 °C, and at 12 bits 0.0625 °C. At the default resolution (10 bits, 0.25 °C/LSB), the conversion time is nominally 21 milliseconds. ...
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... GND (pin cannot float). Total capacitance on this pin must be <100 pF. Note: By tying Addr/Therm to ground, the device functions as one address device only. The Therm functionality is then not available. The address for device STTS751-0 is 72h and the address for device STTS751-1 is 76h. GND Power supply V DD SMBus clock Open-drain interrupt output ...
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... High Limit Registers Low Limit Registers One-Shot Therm LIMIT Therm HYSTERESIS Control Logic SMBus Timeout Product ID Manufacturer ID Revision Converter Digital Comparator Alert Response GND SCL SDA Host Controller EVENT Addr/Therm Doc ID 16483 Rev 5 STTS751 Interrupt Enabling EVENT Addr/Therm AM03030v1 Fan Driver AM03031v1 ...
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... The device supports the SMBus Alert Response address (ARA) protocol. The ARA is polled by the controller (host) device that supports this protocol whenever it detects that the EVENT pin has been asserted. The STTS751 will respond with its device address (refer to Section 3.8 on page The STTS751 contains 16 registers ...
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... SMBus interface 3 SMBus interface 3.1 SMBus protocol The STTS751 communicates over a 2-wire serial interface compatible with the SMBus standard. Temperature data, alarm limits and configuration information are communicated over the bus. A detailed timing diagram is shown below in Figure 5. SMBus timing diagram T LOW ...
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... STTS751 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 1 bit 7 bits 3.3 ...
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... When timeout is enabled, the STTS751 will time out after inactivity. The STTS751 supports the SMBus timeout feature. If the host holds SCL low or the device drives SDA low for more than t This feature is turned on by default. The STTS751 also supports timeout while in standby mode and when the device is driving SDA low ...
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... STTS751 register summary The STTS751 uses 8-bit registers. Variables longer than 8 bits are managed in byte pairs. For example, when reading a 10-bit temperature value (10 bits is the default resolution.) the application must read two registers and then concatenate the upper byte with the 2 most significant bits of the lower byte ...
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... The lower four bits of the low byte will always read 0. At power-up, the STTS751 defaults to 10-bit resolution. Thus, bits b5 and b4 of the lower byte will also read 0 until the device is configured to a higher resolution (via the Tres bits in the configuration register) ...
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... Doc ID 16483 Rev 5 STTS751 register summary Power- default (hex) 4°C 2 °C 1 °C 55 (85 °C, dec 4°C 2 °C 1 ° °C 4°C 2 °C ° ° ...
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... ADDR R/W Register (hex Status The STTS751 status register is read-only and located at address 01h. The various status bits function as described below. Busy: [7] Bit =1 when a temperature conversion is in progress [6] Bit = 1 indicates temperature high limit has been exceeded (T HIGH T is cleared when the status register is read, provided the condition no longer exists. ...
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... STTS751 4.6 Configuration register The STTS751 configuration register is read/write and controls the functionality of temperature measurements located at address 03h. The configuration register bits function as described below. Table 15. Configuration register ADDR R/W Register (hex) 03 R/W Configuration Description MASK1: [bit 7] 0: EVENT is enabled. Any out-of-limit condition asserts the EVENT pin (active low). ...
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... Table 16. Conversion resolution Tres1:Tres0 RFU [bits 1 and 0] Not used - reserved. 4.7 Conversion rate register The STTS751 conversion rate register is read/write and controls the number of times the temperature value will be updated each second. Table 17. Conversion rate register ADDR R/W Register (hex) 04 R/W Conversion rate The upper four bits of the register are reserved and default power-up ...
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... The device will set the busy bit while the conversion is in progress. The conversion is complete when the busy bit is cleared. The STTS751 returns to standby mode upon completion of the conversion. The one-shot register is write-only and is located at address 0Fh. The value written to invoke the one-shot conversion is a don't care ...
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... The format is 8-bit, two's complement integer. Table 21. Therm hysteresis ADDR R/W Register (hex) 21 R/W Therm hysteresis 4.11 SMBus timeout register At power-up, the STTS751 is configured with an SMBus timeout milliseconds (t ). See Section 3.7 TIMEOUT Table 22. SMBus timeout register ADDR R/W Register (hex) 22 ...
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... STTS751-1 has a Product ID of 01h. Table 23. Product ID register ADDR R/W Register (hex Product ID 4.13 STTS751 manufacturer’s ID The read-only manufacturer located at address FEh. For the STTS751, the value is 53h. Table 24. Manufacturer’s ID register ADDR R/W Register (hex Mfg ID 4.14 STTS751 revision ID The STTS751 revision ID register pointer is read-only and can be accessed at address FFh ...
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... EVENT output 5 EVENT output The STTS751 EVENT output is open drain and requires a pull-up resistor. The EVENT pin is asserted (low) whenever the temperature exceeds the high limit or is equal to or below the low limit. Once asserted, the output will remain asserted until the STTS751 receives an SMBus Alert Response Address (ARA) from the host and acknowledges with its slave address ...
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... Addr/Therm output The Addr/Therm pin functions normally as an output to alert the system of an over temperature condition open drain and requires a pull-up resistor. During power-up, the pull-up value is sensed by the STTS751 to determine what its slave address will be as depicted in Table The Therm output is asserted low whenever the temperature exceeds the Therm limit (address 20h) ...
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... Supply voltage DD I Output current O θ Thermal resistance (junction to ambient Reflow at peak temperature of 260 °C. The time above 255 °C must not exceed 30 seconds. 24/36 Parameter off) DD UDFN-6L SOT23-6L Doc ID 16483 Rev 5 STTS751 Value Unit –55 to 150 °C 260 °C – ° ...
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... STTS751 8 DC and AC parameters This section summarizes the operating measurement conditions, and the DC and AC characteristics of the device. The parameters in the DC and AC characteristics tables that follow, are derived from tests performed under the measurement conditions summarized in Table 27: Operating and AC measurement operating conditions in their circuit match the operating conditions when relying on the quoted parameters ...
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... Supply voltage DD Operating current dependent upon I DD conversion rate I Standby current SB Temperature measurement (4) Accuracy 2. 3.6 V STTS751 is programmable from 9 bits Resolution to 12 bits (0.5 °C/LSB to 0.0625 °C) t Conversion time CONV Low level output voltage V OL Addr/Therm, EVENT High level output leakage current I OH ...
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... STTS751 Table 28. DC and AC characteristics (continued) Symbol Description Pull-up supply voltage V PV (open drain) Power On Reset threshold V POR (POR SMBus timeout TIMEOUT Spike suppression t Pulse width of spikes that must SP be suppressed by the input filter 1. Valid for ambient operating temperature Typical numbers are for T = +25 ° ...
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... Package mechanical data 9 Package mechanical data In order to meet environmental requirements, ST offers these devices in different grades of ® ECOPACK packages, depending on their level of environmental compliance. ECOPACK specifications, grade definitions and product status are available at: www.st.com. ® ECOPACK trademark. 28/36 Doc ID 16483 Rev 5 STTS751 ® ...
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... STTS751 Figure 9. UDFN- 0.5 mm) package mechanical drawing Table 30. UDFN- 0.5 mm) package mechanical data Sym Min Typ Max 0.45 0.50 0.55 0.00 0.05 0.065 0.20 0.25 0.30 1.95 2.00 2.05 1.95 2.00 2.05 0.65 0.50 0.60 0.70 Doc ID 16483 Rev 5 Package mechanical data ...
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... Doc ID 16483 Rev 5 STTS751 7049717_G inches Min Typ Max 0.057 0.000 0.006 0.035 0.045 0.051 0.012 0.020 0.003 0.009 0.114 0.110 0.063 0.037 ...
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... STTS751 Figure 11. UDFN-6L package footprint Figure 12. SOT23-6L package footprint Doc ID 16483 Rev 5 Package mechanical data 8187820_A(LP) 7049714_G(LP) 31/36 ...
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... Doc ID 16483 Rev 2.20 2.20 0.75 4.00 ±0.10 ±0.10 ±0.10 ±0.10 3.23 3.17 1.37 4.00 ±0.10 ±0.10 ±0.10 ±0.10 STTS751 AM03073v1 T Unit 0.25 mm ±0.05 0.254 mm ±0.013 ...
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... STTS751 Figure 14. Reel schematic D A Full radius Table 33. Reel dimensions for 8 mm carrier tape - UDFN-6L and SOT23-6L packages A B (max) (min) 180 mm 1 inch) Note: The dimensions given in parameters. 40mm min. Access hole At slot location B Tape slot In core for Tape start 2 ...
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... Temperature range 3 = –40 °C to 125 °C Shipping method ® ECOPACK package, tape & reel ® ECOPACK package, tubes For other options, or for more information on any aspect of this device, please contact the ST sales office nearest you. 34/36 STTS751-0 Doc ID 16483 Rev 5 STTS751 ...
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... STTS751 11 Revision history Table 35. Document revision history Date 06-Nov-2009 21-Jan-2010 12-May-2010 01-Jul-2010 20-Jul-2010 Revision 1 Initial release. Updated Features; removed Therm2 throughout document (from Section 1, 2, 3.8, 4.6, 4.10 updated Figure 3, Section Table 10, 11, 12, 13, 14, 15, 17, 18, 19, 20, 21, 22, 23, 24, 25; added package footprints ...
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... Australia - Belgium - Brazil - Canada - China - Czech Republic - Finland - France - Germany - Hong Kong - India - Israel - Italy - Japan - Malaysia - Malta - Morocco - Philippines - Singapore - Spain - Sweden - Switzerland - United Kingdom - United States of America 36/36 Please Read Carefully: © 2010 STMicroelectronics - All rights reserved STMicroelectronics group of companies www.st.com Doc ID 16483 Rev 5 STTS751 ...