f75363 Feature Integration Technology Inc., f75363 Datasheet
f75363
Available stocks
Related parts for f75363
f75363 Summary of contents
Page 1
... F75363 Datasheet o ±1 C Accuracy Temperature Sensor IC with Fan Speed Control Release Date: July, 2007 Revision: V0.27P ...
Page 2
... F75363 Datasheet Revision History Version Date Page 0.20P Jan.,2005 0.21P Feb.,2005 16 0.22P May.,2005 0.23P 0.24P July, 2006 12 13 0.25P Dec, 2006 1 0.26P Jan, 2007 14 0.27P July,2007 - Please note that all data and specifications are subject to change without notice. All the trade marks of products and companies mentioned in this data sheet belong to their respective owners ...
Page 3
... Index 17h ......................................................................... 12 Index 30h ............................................................................. 12 Index 31h (Fintek Mode)....................................... 13 Index 4Ah ................................................. 13 Index 4Bh ...................................................... 14 Index 4Ch ............................................................................. 14 Index 4Dh.............................................................. 14 Index 4Fh.......................................................... 15 Index FEh ................................................ 15 Index FFh................................................................................ 15 -II- F75363 Index 50h to 5Fh .................. 15 July, 2007 V0.27P ...
Page 4
... Temperature and Fan Count Value Registers 8. PCB Layout Guide ............................................................................................................ 16 9. Electrical characteristic ..................................................................................................... 17 9.1 Absolute Maximum Ratings............................................................................................. 17 9.2 DC Characteristics .......................................................................................................... 18 9.3 AC Characteristics........................................................................................................... 19 10. Ordering Information ......................................................................................................... 19 11. Package Dimensions ........................................................................................................ 20 10 Application Circuit .................................................................................................................... 1 F75363 Index 10h- 2Fh ................................. 15 -III- F75363 July, 2007 V0.27P ...
Page 5
... As for fan speed control, the F75363 can use PWM duty cycle output to automatically control fan speed. The fan speed control is related to temperature variation. There is 8-step lookup table for users to program PWM duty cycle output to control fan speed according to the temperature variation ...
Page 6
... POD This is a multi-function pin. Power-on default is PWMOUT 12 function. When it acts as PWMOUT function, it controls the (5V-tolerance) fan speed. When it acts as THERM# function, it will be asserted when the temperature exceeds its thermal limit. -2- F75363 +126 +100 C ...
Page 7
... As for fan speed control, the F75363 can use PWM duty cycle output to automatically control fan speed. The fan speed control is related to temperature variation. There is 8-step lookup table for users to program PWM duty cycle output to control fan speed according to the temperature variation ...
Page 8
... R Ack Frame 1 by 363 Internal Index Register Byte R Ack Frame 1 by 363 0 -4- F75363 Ack by Frame 2 363 Stop by Master Frame 3 Data Byte Ack ...
Page 9
... D+/D- capacitance Capacitance(nf) Local Temperature error(℃ Temperature(℃) Remote Temperature error(℃ Temperature(℃) -5- F75363 90 100 110 120 130 90 100 110 120 90 100 110 120 130 July, 2007 V0.27P ...
Page 10
... Temperature Monitoring The F75363 monitors a local and a remote temperature sensor. Both can be measured from 0°C to 126.875°C. The temperature format is as the following table: Temperature ( High Byte ) 0°C 1°C 25°C 50°C 75°C 90°C 100° ...
Page 11
... Remote Temperature High Limit 6.4.2 Interrupt mode The F75363’s ALERT# output can be used as a simple interrupt signal if Comparator Mode bit is not asserted. If the triggering conditions occur, relative alert status will be asserted and ALERT# will go to low. The F75363 will set the ALERT Mask bit and relative alert status will be cleared after master’ ...
Page 12
... If ALERT# is connected to one or more ALERT# outputs of SMBus compatible devices, the master may send an ARA command to ask that which device is pulling ALERT# to low. When the ALERT# is pulled to low by F75363 and F75363 receives the ARA command sent by the master, F75363 will send its address to the master. The F75363 will reset its ALERT# output and set the ALERT Mask bit once the master acknowledges its response of device address. The master may read F75363’ ...
Page 13
... Temperature Fault Queue The F75363 provides a Fault Queue bit in Configuration Register (index 03h) to prevent false alert triggering. By setting Fault Queue bit the F75363 will require three consecutive triggering conditions of temperature readings to set relative alert status bits to 1. The power-on default value of Fault Queue bit is 0. ...
Page 14
... Power on default <7:0> = 00h T1 = On-chip temperature sensor (Local) F75363 Set to 0, the F75363’s PWM output continues to output the control signal while in standby. (when bit 6 is set to 1) These bits are unused and always set to 0 Set to 1, pin6 is fan Tachometer input. ...
Page 15
... Set to 1, enable serial interface timeout function. (25ms). Set to 0, disable. These bits are unused and always set Pin 2 external temperature sensor (Remote) -11- F75363 Description Description Description Value Conversion/Sec 06h 4 07h 8 08h 16 09h 32 0Ah ~ FFh ...
Page 16
... When bit7 set to 0, tachometer input filter can be selected here. 2’b00: Filter time = 177.6us 2’b01: Filter time = 355.2us 2’b10: Filter time = 888us 2’b11: Filter time = 1.776ms This bit is unused and always set to 0 Fintek test mode used only -12- F75363 Description Description Description July, 2007 V0.27P ...
Page 17
... This bit is not used and always set to 0 00: Traditional Tachometer Input Mode 01: Improved Traditional Tachometer Input Mode 10: Most Accurate Mode 11: Least Effort Mode Note: If the PWM Clock is 333 kHz, Traditional Tachometer Input Mode is always used. -13- F75363 Description Description July, 2007 V0.27P ...
Page 18
... T-P lookup table. R/W If PWM_MODE is set to 1, this register is read/write and the software programs this register directly. These bits are unused and always set PWM frequency = PWM_CLK / 2n R/W (PWM_CLK = 333 kHz or 1.4 kHz , n = value of this register) -14- F75363 Description Description Description July, 2007 V0.27P ...
Page 19
... These bits are unused and always set to 0 5-0 PWM output value corresponds to the temperature entry in INDEX 5(x)h. These bits are unused and always set to 0 Rewriteable register 0: ALERT# is INTERRUPT mode 1: ALERT# is COMPARATOR mode 18h Pin 2 external temperature sensor (Remote) -15- F75363 Description Description Description July, 2007 V0.27P ...
Page 20
... The following guideline should be taken to reduce the measurement error of the temperature sensors: 1. Place the F75363 as close as practical to the remote sensing diode. In noisy environments, such as a computer main-board, the distance can inches. (typ). This length can be increased if the worst noise sources are avoided ...
Page 21
... D+ & cause a 1℃ measurement error. Adding a few thermocouples causes a negligible error. 5. Place a 0.1µF bypass capacitor close to the V 2200pF input filter capacitors across D+, D- close to the F75363 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. ...
Page 22
... Conversions / Sec Rate 0.0625 Conversions / Sec Rate VDD input, Disables ADC , Rising Edge High Level Low Level SYM. MIN. TYP. MAX. IOL 10 12 Vt- 0.4 0.8 Vt+ 2.0 2.4 ILIH 1 ILIL 1 -18- F75363 V ° C ° C MIN TYP MAX Unit o ± ± ± ± ± 3.0 3 ...
Page 23
... F75363 t SCL SU;DAT VALID DATA t HD;DAT Serial Bus Timing Diagram SYMBOL MIN 0.5 SCL t 0.5 HD;SDA t 0.5 SU;STO t 50 SU;DAT t 50 HD;DAT Production Flow Commercial, 0 ° +70 ° C -19- F75363 SU;STO MAX. UNIT 10000 0.4 uS 0.4 nS July, 2007 V0.27P ...
Page 24
... BSC 1.27 BSC 6.20 5.80 0.228 0.244 0.10 0.004 0.40 1.27 0.016 0.050 (F75363 8-SOP Package ) 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 -20- F75363 0.25 GAUGE PLANE July, 2007 V0.27P ...
Page 25
... R23 330 3 PWM/THERM# NMOS 2 47U 1 C10 CON3 0.1U FAN Circuit for High PWM Frequency Title Feature Integration Technology Inc. Size Document Number A F75363 Application Circuit Date: Wednesday , January 26, 2005 Sheet -1- R3 4.7K SCLK SDATA ALERT#/TACH 27K ALERT#/TACH R24 10K Rev 0 ...