f75395 Feature Integration Technology Inc., f75395 Datasheet
f75395
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f75395 Summary of contents
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... F75395 o ±1 C Temperature Sensor with ß Compensation Release Date: May, 2008 Revision: V0.15P ...
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... Fintek for any damages resulting from such improper use or sales. F75395 Revision History Preliminary Version Add function description Add register description F75395 won’t provide SOP package in the future. Add ordering information. Add Electrical characteristic Modify typo. Modify typo. of Chapter 6.4 for Temperature Range Table -I- F75395 May, 2008 V0 ...
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... Chip ID (LSB) Register Index 5Bh ............................................................................ 12 7.11 Fintek Vendor ID (MSB) (Manufacturer ID) Register Index 5Dh................................ 12 7.12 Fintek Vendor ID (LSB) (Manufacturer ID) Register Index 5Eh................................. 12 7.13 Fintek Vendor ID II (Manufacturer ID) RegisterIndex FEh.......................................... 12 7.14 Value RAM Index 10h- 2Fh ....................................................................................... 12 7.15 SST Command Table..................................................................................................... 13 8. Electrical characteristic.......................................................................................................... 14 F75395 -II- F75395 May, 2008 V0.15P ...
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... Absolute Maximum Ratings .............................................................................................. 14 8.2 DC Characteristics ............................................................................................................ 14 8.3 AC Characteristics ............................................................................................................ 16 9. Ordering Information ............................................................................................................. 16 10. Package Dimensions............................................................................................................. 17 11. Application Circuit.................................................................................................................. 18 F75395 -III- F75395 May, 2008 V0.15P ...
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... An 11-bit analog-to-digital converter (ADC) was built inside F75395. The F75395 can monitor two set of temperature which is very important for the system to work stably and properly. This chip provides 1 remote temperature sensor and 1 local temperature sensor. The remote temperature sensor can be performed by CPU thermal diode or transistor 2N3906. The F75395 also can support new generational 45nm CPU temperature sensing by varied ß ...
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... TTL level bi-directional pin with 12 mA source-sink capability 12t I/O - TTL level and schmitt trigger 12ts O - Output pin with 12 mA source-sink capability 12 F75395 3.0~3.6V 180 uA (typ) -2- F75395 May, 2008 V0.15P ...
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... Functional Description 6.1 General Description The F75395 is a simple temperature sensor with warning signal output. It includes a local and a remote temperature sensor. Both measured temperature are compared with its high, low and THERM limits which are stored in the registers. When one or more out-of-limit events occur, the flags in Status Register will be set and that may cause ALERT output to low. Also, measured temperature exceeding THERM limit may cause THERM output to low ...
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... Access Interface The F75395 can be connected to a compatible 2-wire serial system management bus as a slave device under the control of the master device, using two device terminals SCL and SDA. The F75395 supports SMBus protocol of, “Write Byte”, “Read Byte”, both with or without Packet Error checking (PEC) which is calculated using CRC-8 ...
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... The F75395 also support SST interface for PC system of Intel platform. The system can read temperature and related information by SST interface. The F75395 can be read by Intel chipset SST interface. (Direct connect chipset pin SST to the pin SST of F75395). . About more detail, please refer Intel SST Spec. document (Protocol is edited by Intel). ...
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... If a START command is written, both channels are converted and the results of both measurements are available after the end of conversion. A BUSY status bit in the status byte shows that the device is actually performing a new conversion; however, even if the ADC is busy, the results of the previous conversion are always available. F75395 -6- F75395 May, 2008 V0.15P ...
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... Thermal mass effect can seriously degrade the F75395’s effective accuracy. The thermal time constant of the MSOP package is about 140 in still air. For the F75395 junction temperature to settle to within +1°C after a sudden +100°C change requires about five time constants or 12 minutes. The use of smaller packages for remote sensors such as SOT23, improves the situation. Take care to account for thermal gradients between the heat source and the sensor package do not interfere with measurement accuracy ...
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... V BE The F75395 measures temperature from the thermal diodes by the basic. In traditional case, the F75395 outputs dual currents to a thermal diode. Then the F75395 calculates the absolute temperature by △ V normally very high such that the percent change in beta is very small. For example, 15% variation in beta for two forced I and the beta is 50 would contribute about 0.32 ℃ ...
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... Place a 0.1µF bypass capacitor close to the VCC pin. In very noisy environments, place an external 2200pF input filter capacitors across D+, D- close to the F75395 the distance to the remote sensor is more than 8 inches, the use of twisted pair cable is recommended. It will work up to around feet ...
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... Description xxh When chip is at standby mode, writing any value to this register will initiate a single conversion and comparison cycle. After the single cycle, chip will returns to standby mode. -10- F75395 Value Conversion/Sec 06h 4 07h 8 08h 16 09h 32 0Ah 64 0Bh ~ FFh Reserved May, 2008 V0 ...
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... ARA(Alert Response Address). Description 1 1: Enable beta compensation function. 0: Disable beta compensation function pad BIAS voltage 150mV 1: DN pad BIAS voltage 220mV 0h Dummy registers Enable resister cancelled function. 0: Disable register cancelled function. 2h Dummy registers. Description -11- F75395 May, 2008 V0.15P ...
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... Fintek Chip ID 2 19h Fintek Vendor ID 1 34h Fintek Vendor ID 2 23h Vendor ID Read Read Address Address (High Byte) (Low Byte) RO 00h 1Ah -12- F75395 Description Description Description Description Description Write Write Address Address (High Byte) (Low Byte) May, 2008 V0.15P ...
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... Use 0x4C SST address (default CR3D) and command 0x01 to get F75395 external temperature. Use 0x4C SST address (default CR3D) and command 0x02 to get F75395 internal temperature. Returns a 4-byte block of data. 8 bytes of DIB information. 16 bytes of DIB information. -13- F75395 0Bh ...
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... < T < 100 C, VCC = 3. Conversions / Sec Rate 0.0625 Conversions / Sec Rate VDD input, Disables ADC , Rising Edge High Level Low Level -14- F75395 UNIT V V ° C ° C MIN TYP MAX Unit o ± ± 1 ± ± 1 ± ...
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... IOH -12 -10 ILIH +1 ILIL -1 IOL 12 16 IOH -14 -12 IOL 12 16 Vt- 0.5 0.8 1.1 Vt+ 1.6 2.0 2.4 ILIH +1 ILIL -1 -15- F75395 UNIT CONDITIONS VOL = 0.4V mA VOH = 2.4V µA VIN = VDD µA VIN = 0V V VDD = 3 VDD = 3 VOL = 0 VOH = 2.4V µA VIN = VDD µA VIN = 0V mA VOL = 0.4V mA VOH = 2.4V mA VOL = 0 ...
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... HD;DAT Serial Bus Timing Diagram SYMBOL MIN SCL t 300 HD;SDA t 300 SU;STO t 50 SU;DAT t 5 HD;DAT t R Package Type Production Flow 8-MSOP Green Package Commercial, 0°C to +70°C -16- F75395 SU;STO MAX. UNIT 300 nS May, 2008 V0.15P ...
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... Please note that all datasheet and specifications are subject to change without notice. All the trade marks of products and companies mentioned in this datasheet belong to their r respective owne F75395 Taipei Office Bldg. K4, 7F, No.700, Chung Cheng Rd., Chungho City, Taipei, Taiwan 235, R.O.C. TEL : 866-2-8227-8027 FAX : 866-2-8227-8037 -17- F75395 May, 2008 V0.15P ...
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... SST Address = 4Ah R4 = 30K I2C Address = 6Ah SST Address = 49h R4 = 47K I2C Address = 68h SST Address = 48h Title Feature Integration Technology Size Document Number Custom F75395 Application Circuit Date: Thursday , May 29, 2008 Sheet -18- SCLK SDATA Rev <Rev Code> May, 2008 ...