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F75363 datasheet 1 o c accuracy temperature sensor ic with fan speed control release date: july, 2007 revision: v0.27p
F75363 F75363 july, 2007 v0.27p -i- F75363 datasheet revision history version date page revision history 0.20p jan.,2005 original version (confidential) 0.21p feb.,2005 16 1. update ara register/index fdh 2. update vendor id(manufacture id) register/index feh 3. add version id register/index ffh 0.22p may.,2005 11 15 16 1. update alert mask register default value 2. update version id register/index ffh 3. update t1 high limit default value 0.23p updated typo and patent 0.24p july, 2006 12 13 1. alert mask register1, index 16h correction 2. alert mask register2, index 17h correction 3. pwm control and fan monitor register, index 4ah correction 0.25p dec, 2006 1 add taiwan pa tent certification number 0.26p jan, 2007 14 register-0 x4c description correction 0.27p july,2007 - company readdress please note that all data and specifications are subject to change without notice. all t he trade marks of products and companies mentioned in this data sheet belong to their respective owners. life support applications these products are not designed for use in life support applia nces, devices, or systems where malfunction of these products can reasonably be expected to result in personal injury. customers using or selling these products for use in such applications do so at their own risk and agr ee to fully indemnify fintek for any damages resulting from such improper use or sales.
F75363 F75363 july, 2007 v0.27p -ii- table of contents 1. general de scripti on ............................................................................................................ 1 2. featur es....................................................................................................................... ....... 1 3. key specif icati ons............................................................................................................. .. 2 4. pin config uration .............................................................................................................. .. 2 5. pin descr iptions............................................................................................................... ... 2 6. functional de scripti on ........................................................................................................ 3 6.1 general descrip tion ....................................................................................................... .3 6.2 access interface .......................................................................................................... ... 3 6.3 typical operating ch aracterist ics ................................................................................ 4 6.4 temperature m onitoring............................................................................................... 6 6.4 aler t# si gnal ............................................................................................................. ...... 7 6.5 temperatur e fault queue ............................................................................................. 9 7. registers de scripti on.......................................................................................................... 9 7.1 configuration register ? index 03h (09h) ...................................................................... 9 7.2 status register ? index 02h......................................................................................... 10 7.3 status register ? index 18h......................................................................................... 10 7.4 real-time status register ? index 2eh ....................................................................... 11 7.5 conversion rate register ? index 04h (0ah) .............................................................. 11 7.6 serial interface timeout register ? index 22h ............................................................. 11 7.7 alert mask register 1 ? index 16h ......................................................................... 11 7.8 alert mask register 2 ? index 17h ......................................................................... 12 7.9 pwm control register ? index 30h ............................................................................. 12 7.10 fintek pwm control register ? index 31h (f intek m ode)....................................... 13 7.11 pwm control and fan monitor register ? index 4ah ................................................. 13 7.12 fan spin-up conf iguration register ? index 4bh ...................................................... 14 7.13 pwm value register ? index 4ch ............................................................................. 14 7.14 fan pwm frequency register ? index 4dh.............................................................. 14 7.15 lookup table hysteresis register ? index 4fh.......................................................... 15 7.16 temperature vs. pwm duty lookup table registers ? index 50h to 5fh .................. 15 7.17 alert mode and temperature filter control register -- index bfh .......................... 15 7.18 ara register --- index fdh ........................................................................................ 15 7.19 vendor id ii (manufacturer id) register ? index feh ................................................ 15 7.20 version id register ? index ffh................................................................................ 15
F75363 F75363 july, 2007 v0.27p -iii- 7.21 temperature and fan count value registers ? index 10h- 2fh ................................. 15 8. pcb layout guide ............................................................................................................ 16 9. electrical char acterist ic ..................................................................................................... 1 7 9.1 absolute ma ximum ra tings............................................................................................. 17 9.2 dc charac teristics ......................................................................................................... .18 9.3 ac charac teristics......................................................................................................... .. 19 10. ordering info rmation ......................................................................................................... 19 11. package dimens ions ........................................................................................................ 20 10 applicati on circu it ......................................................................................................... ........... 1
F75363 F75363 july, 2007 v0.27p -1- 1. general description the F75363 is a temperature sensor ic with pwm duty cycle output which is specific designed for graphic cards etc. an 11-bit analog-to-digital converter (adc) was built inside F75363. the F75363 can monitor temperature and fan speed which is important for the syst em to work stably and properly. this chip provides 1 remote temperature sensor and 1 local temperature se nsor. the remote temperature sensor can be performed by cpu/gpu thermal diode or transistor 2n3906. the users can set up the upper and lower limits (alarm thresholds) of all monitored paramete rs and this chip can also issue warning messages for system protection when there is something wrong with monitored items. as for fan speed control, the F75363 can use pwm duty cycle output to automatically control fan speed. the fan speed control is re lated 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. the F75363 is in the package of 8-pin sop and powered by 3.3v. 2. features ? provide 1 on-chip local and 1 remote temperature sensing ? accuarcy 9 1 o c accuarcy on remote channel (+60 o c to +126 o c) 9 3 o c accuarcy on local channel(+0 o c to +100 o c) ? user selectable multi-function pin for either pwm dut y cycle output or therm# signal output function ? user selectable multi-function pin for either alert# output or tachometer input function ? automatic fan speed control with user programmable 8-step lookup table ? programmable alert queue and limited and setting points(alert threshold) for monitored items ? 2 wire smbus interface and alert# output for smbus alert ? 3vcc operation and in 8-sop package patented: twi235231, twi263788
F75363 F75363 july, 2007 v0.27p -2- 3. key specifications ? supply voltage 3.0~3.6v ? supply current 630 ua (typ) (@ conversion rate = 16hz) ? measured range 0 ~ 126.75 o c ? remote diode temperature accuracy 1 o c from +60 o c to +126 o c ? local temperature accuracy 3 o c from +0 o c to +100 o c 4. pin configuration 5. pin descriptions pod 12 - pure open-drain output pin with 12 ma sink capability in ts - ttl level input pin and schmitt trigger ain - input pin(analog) pwr - power pin no pin name type description 1 vcc pwr power pin 2 d+ ain positive connection to remote temperature sensor (ex: thermal diode anode) 3 d- ain negative connection to remote temperature sensor(ex: thermal diode cathode) 4 pwmout / therm# pod 12 (5v-tolerance) this is a multi-function pin. power-on default is pwmout function. when it acts as pwmo ut function, it controls the fan speed. when it acts as therm# function, it will be asserted when the temperature exceeds its thermal limit. 1 2 3 4 8 7 6 5 vcc d+ d- pwmout/therm# scl sd a a lert#/fanin gnd
F75363 F75363 july, 2007 v0.27p -3- 5 gnd pwr ground 6 alert# / fanin pod 12 / in ts (5v-tolerance) this is a multi-function pin. power-on default is alert# function. when it is used as alert# function, it will be asserted when the temperature ex ceeds its high limit or goes below its low limit. when it is as fanin function, it is for monitoring the fan speed. 7 sda in ts /pod 12 (5v-tolerance) serial bus data 8 scl in ts(5v-tolerance) serial bus clock 6. functional description 6.1 general description the F75363 is a temperature sensor ic with pwm duty cycle output which is specific desi gned for graphic cards etc. an 11-bit analog-to-digital converter (adc) was built inside F75363. this chip provides 1 remote temperature sensor and 1 local temperature sensor. the remote temperature se nsor can be performed by cpu/gpu thermal diode or transistor 2n3906. users can set up the upper and lower limit s (alarm thresholds) of monitored parameters and this chip can also issue warning messages for system protection when there is something wrong with monitored items. as for fan speed control, the F75363 can use pwm duty cycle output to automatically cont rol fan speed. the fan speed control is related to temperature variat ion. there is 8-step lookup table for us ers to program pwm duty cycle output to control fan speed according to the temperature variation. 6.2 access interface the F75363 can be connected to a compatible 2-wire serial system management bus as a slave device under the control of the master devic e, using two device terminals scl and sda. the F75363 supports smbus protocol of, ?write byte?, ?read byte?, both with or without packet e rror checking (pec) which is calculated using crc-8. for detail information about pec, please check smbus 1.1 specific ation. F75363 supports 25ms timeout for no activity on the smbus. this timeout function is programmed at 22h bit7 and default is disabled. F75363 also supports alert response address (ara) protocol. the operation of the protocol is described with details in the following sections. (a) smbus write to internal address re gister followed by the data byte
F75363 F75363 july, 2007 v0.27p -4- 0 start by master 0 1 011 00 d7 d6 d5 d4 d3 d2 d1 d0 ack by 363 r/w ack by 363 scl sda d7 d6 d5 d4 d3 d2 d1 d0 stop by master scl sda (continued) 780 78 0 78 frame 2 internal index register byte (continued) frame 3 data byte frame 1 serial bus address byte figure 1. serial bus write to internal address register followed by the data byte (b) serial bus write to internal address register only 0 start by master 0 1 011 00 d7 d6 d5 d4 d3 d2 d1 d0 ack by 363 r/w ack by 363 scl sda 780 78 0 frame 2 internal index register byte frame 1 serial bus address byte figure 2. serial bus write to internal address register only stop by master (c) serial bus read from a register with the internal address register prefer to desired location 0 start by master 0 1 011 00 d7 d6 d5 d4 d3 d2 d1 d0 ack by master r/w ack by 363 scl sda 780 78 0 frame 2 internal index register byte frame 1 serial bus address byte figure 3. serial bus read from internal address register stop by master (d) alert response address 0 start by master 00011 00 01001100 ack by master r/w ack by 363 scl sda 780 78 0 frame 2 device address frame 1 alert response address figure 4. alert response address stop by master 6.3 typical operating characteristics (a) temperature error vs.d+/d- capacitance
F75363 F75363 july, 2007 v0.27p -5- temperature error( j ) vs. d+/d- capacitance -18 -16 -14 -12 -10 -8 -6 -4 -2 0 0 10 20 30 40 50 60 70 80 90 100 110 120 130 capacitance(nf) temperature error( j (b) local temperature error vs. die temperature local temperature error( j ) -0.5 0 0.5 1 1.5 2 2.5 3 3.5 0 102030405060708090100110120 temperature( j ) temperature error( j ) (c) remote temperature error vs. die temperature remote temperature error( j ) -1 -0.5 0 0.5 1 1.5 2 2.5 3 0 102030405060708090100110120130 temperature( j ) temperature error( j )
F75363 F75363 july, 2007 v0.27p -6- (d) operating supply current vs. conversion rate operating current (ua) 0 100 200 300 400 500 600 700 800 900 0.063 0.125 0.25 0.5 1 2 4 8 16 32 conversion rate(hz) operating current (ua) fan output duty = 100% fan output duty = 50% 6.4 temperature monitoring the F75363 monitors a local and a remote temperature se nsor. both can be measured from 0c to 126.875c. the temperature format is as the following table: temperature ( high byte ) digital output temperature ( low byte ) digital output 0c 0000 0000 0c 000 0 0000 1c 0000 0001 0.125c 001 0 0000 25c 0001 1001 0.250c 010 0 0000 50c 0011 0010 0.375c 011 0 0000 75c 0100 1011 0.500c 100 0 0000 90c 0101 1010 0.625c 101 0 0000 100c 0110 0100 0.750c 110 0 0000 126c 0111 1110 0.875c 111 0 0000 t remote-sensor transistor manufacturers manufacturer model number panasonic 2sb0709 2n3906 philips pmbt3906
F75363 F75363 july, 2007 v0.27p -7- 6.4 alert# signal alert#/fanin (pin 6) can be used as alert# output or fan tachometer input by setting configuration register (index 03h). when pin 6 is used as alert# output, there are three diff erent alert functions can be used. the interrupt methods that alert# pin can act are (1) comparator mode (2 ) interrupt mode (3) alert response address mode. 6.4.1 comparator mode when the comparator mode bit in configur ation register (index bfh) is assert ed, alert# is used as a temperature comparator. if the triggering conditions occur, alert# will go to low and relative alert status will be asserted until those conditions are no longer present. this m ode is not the power-on default state. note that the triggering conditions do not include busy and open status in co nfiguration register (index 02h). 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 a sserted and alert# will go to low. the F75363 will set the alert mask bit and relative alert status will be cleared after mast er?s reading of the status re gister (index 02h or 18h). the alert mask bit is set in order to prevent further alert# tr iggering after the end of one temperature conversion if the triggering conditions are still present. at the end of interrupt service routine, the master has to reset alert mask bit in configuration register. note that the tri ggering conditions do not include busy and open status in configuration register (index 02h). monitoring remote temperature remote temperature high limit F75363 alert# pin remote high alert status time
F75363 F75363 july, 2007 v0.27p -8- 6.4.3 alert response address mode 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 a cknowledges its response of device address. the master may read F75363?s status registers to check what the triggering conditions occur. at the end of interrupt service routine, the master has to reset alert mask bit in configuration register . note that the triggering conditions do not include busy and open status in configuration register (index 02h). the ara, 000 1100, is a general call address and is defined in smbus specifications. no devices should be assigned to this address. monitorin g remote tem p erature remote tem p erature hi g h limit F75363 alert# pin remote high alert status time alert mask alert mask is set and alert status is clear end of temperature conversion after reading status register monitorin g remote tem p erature remote tem p erature hi g h limit F75363 alert# pin remote high alert status time alert m as k alert mask is set after alertin g device alert status is cleared after reading address is transmitted correctl y status register
F75363 F75363 july, 2007 v0.27p -9- 6.5 temperature fault queue the F75363 provides a fault queue bit in conf iguration register (index 03h) to prevent false alert triggering. by setting fault queue bit to a 1, the F75363 will require three consecutive triggering conditions of temperature readings to set relative alert status bits to 1. the powe r-on default value of fault queue bit is 0. 7. registers description 7.1 configuration register ? index 03h (09h) power on default <7:0> = 00h bit name attribute description 7 alert_mask r/w set to 1, mask alert# signal output. 6 run_stop r/w set to 0, monitor. set to 1, stop monitor (in standby). 5 pwm_dis_stby r/w set to 1, pwmout will be disabled while in standby. (when bit 6 is set to 1) monitoring remote temperature remote temperature high limit remote high alert status (comparator mode) sample number n n+1 n+2 n+3 n+4 n+5 n+6 n+7 n+8 n+9 n+10 n+11
F75363 F75363 july, 2007 v0.27p -10- set to 0, the F75363?s pwm output continues to output the control signal while in standby. (when bit 6 is set to 1) 4~3 reserved ro these bits are unused and always set to 0 2 alert_tach_sel r/w set to 1, pin6 is fan tachometer input. set to 0, pin6 is alert output. 1 reserved ro this bit is unused and always set to 0 0 alert_queue r/w set to 1, an alert will be generated if consecutive abnormal events occur three times. set to 0, an alert will be generated if any abnormal event occurs. 7.2 status register ? index 02h power on default <7:0> = 00h t1 = on-chip temperature sensor (local) t2 = pin 2 external temperature sensor (remote) bit name attribute description 7 adc_busy ro set to 1, adc is converting. 6 t1_high_sts ro set to 1, t1 temperature exceeds high limit. set to 0, t1 temperature does not exceed high limit. 5 t1_low_sts ro set to 1, t1 temperature goes below low limit. set to 0, t1 temperature does not goes below low limit. 4 t2_high_sts ro set to 1, t2 temperature exceeds high limit. set to 0, t2 temperature does not exceed high limit. 3 t2_low_sts ro set to 1, t2 temperature goes below low limit. set to 0, t2 temperature does not goes below low limit. 2 t2_open_sts ro set to 1, t2 is open-circuit or shorted to vdd. set to 0, t2 is not open-circuit and not shorted to vdd. 1 t2_therm_sts ro set to 1, t2 temperature exceeds its thermal limit. set to 0, t2 temperature does not exceed its thermal limit. 0 fan_alarm ro set to 1, fan count is higher than the fan limit value set to 0, fan count is equal or lower than the fan limit value. 7.3 status register ? index 18h power on default <7:0> = 00h t1 = on-chip temperature sensor (local) t2 = pin 2 external temperature sensor (remote)
F75363 F75363 july, 2007 v0.27p -11- bit name attribute description 7 t1_therm_sts ro set to 1, t1 temperature exceeds its thermal limit. set to 0, t1 temperature does not exceed its thermal limit. 6-0 reserved ro these bits are unused and always set to 0 7.4 real-time status register ? index 2eh power on default <7:0> = 00h t1 = on-chip temperature sensor (local) t2 = pin 2 external temperature sensor (remote) bit name attribute description 7-3 reserved ro these bits are unused and always set to 0 2 reserved ro fintek test mode used only 1 t2_therm ro set to 1, t2 temperature exceeds its thermal limit this is a real-time event status 0 t1_therm ro set to 1, t1 temperature exceeds its thermal limit this is a real-time event status 7.5 conversion rate register ? index 04h (0ah) power on default <7:0> = 08h bit name attribute description set conversion times per second. value conversion/sec value conversion/sec 00h 0.0625 06h 4 01h 0.125 07h 8 02h 0.25 08h 16 03h 0.5 09h 32 04h 1 0ah ~ ffh reserved 7-0 conv_rate r/w 05h 2 7.6 serial interface timeout register ? index 22h power on default <7:0> = 00h bit name attribute description 7 en_i2ctmout r/w set to 1, enable serial interfac e timeout function. (25ms). set to 0, disable. 6-0 reserved ro these bits are unused and always set to 0 7.7 alert mask register 1 ? index 16h power on default <7:0> = a4h t1 = on-chip temperature sensor (local) t2 = pin 2 external temperature sensor (remote)
F75363 F75363 july, 2007 v0.27p -12- bit name attribute description 7 reserved ro this bit is unused and always set to 1 6 t1h_mask r/w set to 1, t1 temperature exceeds high limit will not generate an alert. set to 0, t1 temperature exceeds high limit will generate an alert. 5 t1l_mask r/w set to 1, t1 temperature goes below low limit will not generate an alert. set to 0, t1 temperature goes below low limit will generate an alert. 4 t2h_mask r/w set to 1, t2 temperature exceeds high limit will not generate an alert. set to 0, t2 temperature exceeds high limit will generate an alert. 3 t2l_mask r/w set to 1, t2 temperature goes below low limit will not generate an alert. set to 0, t2 temperature goes below low limit will generate an alert. 2 reserved ro this bit is unused and always set to 1 1 t2_thr_mask r/w set to 1, t2 temperature exceeds its thermal limit will not generate an alert. set to 0, t2 temperature exceeds its thermal limit will generate an alert. 0 fan_mask r/w set to 1, fan count exceeds its limit will not generate an alert. set to 0, fan count exceeds its limit will generate an alert. 7.8 alert mask register 2 ? index 17h power on default <7:0> = 00h t1 = on-chip temperature sensor (local) t2 = pin 2 external temperature sensor (remote) bit name attribute description 7 t1_thr_mask r/w set to 1, t1 temperature exceeds its thermal limit will not generate an alert. set to 0, t1 temperature exceeds its thermal limit will generate an alert. 6-0 reserved ro fintek test mode used only 7.9 pwm control register ? index 30h power on default <7:0> = 23h bit name attribute description 7 ftk_mode r/w select method of controlling pwm duty and frequency to fintek mode. 6 reserved ro this bit is unused and always set to 0 5-4 flt_sel r/w 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 3 reserved ro this bit is unused and always set to 0 2 reserved r/w fintek test mode used only
F75363 F75363 july, 2007 v0.27p -13- 1 pt_sel r/w set to 1, select function of pin4 to pwm output. (default) set to 0, select function of pin4 to therm# output. 0 reserved r/w fintek test mode used only 7.10 fintek pwm control register ? index 31h (fintek mode) power on default <7:0> = 00h bit name attribute description 7 ftk_pwmclk_sel r/w set to 0, pwm source clock is 2 mhz. set to 1, pwm source clock is 200 khz. 6-0 ftk_prediv r/w set to 0 or 1 makes no different. pwm clock is divided by this value. pwm clock = pwmout source clock/ftk_prediv 7.11 pwm control and fan monitor register ? index 4ah power on default <7:0> = 20h bit name attribute description 7-6 reserved ro these bits are not used and always set to 0 5 pwm_mode r/w 0: operates in temperature mode. pwmout duty-cycle is automatically adjusted according to the t-p (temperature vs. pwm) lookup table. look-up table is locked. 1: operates in manual mode. software set the pwmout duty-cycle directly. look-up table is programmable. 4 pwm_inv r/w 0: pwm output will be 0 v to turn off fan and open (high-z) to turn on fan. 1: pwm output will be open to turn off fan and 0 v to turn on fan. 3 pwm_clk_sel r/w 0: pwmout frequency source is 333 khz. 1: pwmout frequency source is 1.4 khz. 2 reserved r/w this bit is not used and always set to 0 1-0 tachometer mode r/w 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.
F75363 F75363 july, 2007 v0.27p -14- 7.12 fan spin-up configuration register ? index 4bh power on default<7:0> = 3fh bit name attribute description 7-6 reserved ro these bits are not used and always set to 0. 5 fast tachometer spin-up r/w 0: the spin-up time and duty depends on bit 4-0. 1: sets the pwmout to 100% until the spin-up times out or the minimum rpm limit is reached. when this bit is set, the spin-up duty cycle is always 100%. if pwm spin up time (bit2-0) = 000, the spin-up process is bypassed. 4-3 pwm spin-up duty cycle r/w 00: no spin-up (unless bit5 is set to 0) 01: 50% 10: 75%~81%. depends on pwm frequency select. 11: 100%.(default) 2-0 pwm spin-up time r/w the time unit is 0.5 second. t he default time is 3.5 seconds 000: no spin-up. 001: 0.5 seconds 010: 1.0second 011: 1.5 second 100: 2.0 second 101: 2.5 second 110: 3.0 second 111: 3.5 second 7.13 pwm value register ? index 4ch power on default<7:0> =00h bit name attribute description 7-0 pwm_duty r/w if pwm_mode is set to 0, this register is read only and reflects the current pwm duty-cycle value from the t-p lookup table. if pwm_mode is set to 1, this register is read/write and the software programs this register directly. 7.14 fan pwm frequency register ? index 4dh power on default<7:0> =17h bit name attribute description 7-5 reserved ro these bits are unused and always set to 0 4-0 pwm_freq r/w pwm frequency = pwm_clk / 2n (pwm_clk = 333 khz or 1.4 khz , n = value of this register)
F75363 F75363 july, 2007 v0.27p -15- 7.15 lookup table hysteresis register ? index 4fh power on default<7:0> = 04h bit name attribute description 7-5 reserved ro these bits are unused and always set to 0 4-0 lookup hyst r/w lookup table hysteresis. (1lsb = 1c) 7.16 temperature vs. pwm duty lookup table registers ? index 50h to 5fh power on default<7:0> = 7fh and 3fh index name bits description 7 this bit is unused and always set to 0 50(52,54,56,58, 5a,5c,5e) temp(x) 6-0 when t2 (external) temperature exceeds (gr eater than) this value, pwm output will be the value of index 5(y)h register. 7-6 these bits are unused and always set to 0 51(53,55,57,59, 5b,5d,5f) duty(y) 5-0 pwm output value corresponds to the temperature entry in index 5(x)h. 7.17 alert mode and temperature filt er control register -- index bfh power on default<7:0> = 00h bit name attribute description 7-3 reserved ro these bits are unused and always set to 0 2-1 reserved r/w rewriteable register 0 comparator mode r/w 0: alert# is interrupt mode 1: alert# is comparator mode 7.18 ara register --- index fdh power on default: 0ch (ara address = 18h) 7.19 vendor id ii (manufacturer id) register ? index feh power on default: 23h . 7.20 version id register ? index ffh power on default: 20h. 7.21 temperature and fan count value registers ? index 10h- 2fh t1 = on-chip temperature sensor (local) t2 = pin 2 external temperature sensor (remote)
F75363 F75363 july, 2007 v0.27p -16- the value in quota is its power-on default value. description attribute address(high byte) address (low byte) t1 reading ro 00h 1ah t2 reading ro 01h 10h t1 high limit r/w 05h/0bh (46h) 1bh (00h) t1 low limit r/w 06h/0ch (00h) 1ch (00h) t2 high limit r/w 07h/0dh (55h) 13h (00h) t2 low limit r/w 08h/0eh (00h) 14h (00h) t1 thermal limit r/w 20h (55h) t1 thermal hysteresis r/w 23h (0ah) t2 thermal limit r/w 19h (64h) t2 thermal hysteresis r/w 21h (0ah) fan tachometer count ro 47h (ffh) 46h (ffh) fan tachometer limit r/w 49h (ffh) 48h (ffh) 8. pcb layout guide pcb can be electrically noisy environments, and t he F75363 is measuring very small voltage from the remote sensor, so care must be taken to minimize noise which is occurred at the sensor inputs. the following guideline should be taken to reduce the me asurement 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 be 4 to 8 in ches. (typ). this length can be increased if the worst noise sources are avoided. noise sources generally include switching power plane, clock generators, crts, memory bus es and pci/isa bus etc. 2. route the d+ and d- tracks close together, in parallel, with grounded guard tracks on each side. provide a ground plane under the tracks if possible. do not route d+ & d- lines next to the deflection coil of the crt. and also don?t route the trace ac ross fast digital signals which can easily induce bigger error.
F75363 F75363 july, 2007 v0.27p -17- gnd gnd dxp 10mils 10mils minimum 10mils dxn 10mils 3. use wide tracks to minimize inductance and re duce noise pickup. 10 mil track minimum width and spacing is recommended. 4. try to minimize the number of copper/solder joints, which can cause thermocouple effects. where copper/solder joints are used, make sure that they are in both the d+ and d- path and at the same temperature. thermocouple effects should not be a major problem as 1 corresponds to about j 200v. it means that a copper-solder thermocouple exhibits 3v/ j , and takes about 200v of the voltage error at d+ & d- to cause a 1 j measurement error. adding a few thermocouples causes a negligible error. 5. place a 0.1f bypass capacitor close to the v dd pin. in very noisy environments, place an external 2200pf input filter capacitors across d+, d- close to the F75363. 6. if 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 6 to 12 feet. 7. because the measurement technique uses switc hed current sources, excessi ve cable and/or filter capacitance will affect the measurement accuracy. when using long cables, the filter capacitor may be reduced or removed. cable resistance can also induce errors. 1 ? series resistance introduces about 0.5 error. j 9. electrical characteristic 9.1 absolute maximum ratings parameter rating unit power supply voltage -0.5 to 5.5 v
F75363 F75363 july, 2007 v0.27p -18- input voltage -0.5 to vdd+0.5 v operating temperature 0 to +140 c storage temperature -55 to 150 c note: exposure to conditions beyond those listed under absolute maximum ratings may adversely affect the life and reliability o f the device 9.2 dc characteristics (t a = 0 c to 70 c, vdd = 3.3v 10%, vss = 0v ) parameter conditions min typ max unit temperature error, remote diode 60 o c < t d < 126 o c, vcc = 3.0v to 3.6v 0 o c F75363 F75363 july, 2007 v0.27p -19- 9.3 ac characteristics valid data scl sda in sda out t hd;sda t scl t t su;sto t su;dat serial bus timing diagram t r t r hd;dat serial bus timing parameter symbol min. max. unit scl clock period t - scl 0.5 10000 us start condition hold time t hd;sda 0.5 us stop condition setup-up time t su;sto 0.5 us data to scl setup time t su;dat 50 ns data to scl hold time t hd;dat 50 ns scl and sda rise time t r 0.4 us scl and sda fall time t f 0.4 ns 10. ordering information part number package type production flow F75363sg 8 pin sop (green package) commercial, 0 c to +70 c
F75363 F75363 july, 2007 v0.27p -20- 11. package dimensions l o c d a1 a e b seating plane y 0.25 gauge plane e h e 1 8 5 4 4.00 0.25 0.51 0.25 e c b a1 3.80 0.19 0.33 0.10 0.157 0.010 0.020 0.010 0.150 0.008 0.013 0.004 max. dimension in mm 1.75 a symbol min. 1.35 dimension in inch 0.069 min. 0.053 max. control demensions are in milmeters . 1.27 0.10 6.20 l y h 010 0.40 5.80 e 1.27 bsc 0.050 0.004 0.244 0 0.016 0.228 10 0.050 bsc e d 4.80 5.00 0.188 0.196 (F75363 8-sop package ) p l 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 respective owne r. feature integration technology inc. headquarters taipei office 3f-7, no 36, tai yuan st., bldg. k4, 7f, no.700, chung cheng rd., chupei city, hsinchu, taiwan 302, r.o.c. chungho city, taipei, taiwan 235, r.o.c. tel : 886-3-5600168 tel : 866-2-8227-8027 fax : 886-3-5600166 fax : 866-2-8227-8037 www: http://www.fintek.com.tw
july, 2007 v0.27p -1- 10 application circuit d- d- d+ d+ vcc3v r4 4.7k r5 4.7k pwm/therm# alert#/tach if use therm# and alert# alert#/tach r20 4.7k r24 10k r22 27k q2 pnp r18 4.7k +12v d1 pwm/therm# r19 4.7k r23 330 + c8 47u c10 0.1u q3 nmos vcc3v r25 10k 1 2 3 jp1 con3 tit le size document number rev date: sheet of F75363 application circuit 0.1 feature integration technology inc. a 11 wednesday , january 26, 2005 temperature monitor (cpu thermal diode) c1 3300pf therda therdc temperature monitor (2n3906) c3 3300pf q1 2n3906 d+ 2 vcc 1 d- 3 pwm/therm# 4 sclk 8 alert#/tach 6 sdat 7 gnd 5 u1 F75363 sdata sclk r2 4.7k pwm/therm# r3 4.7k d- d+ c2 0.1u fan circuit for high pwm frequency example 1: example 2: vcc3v alert#/tach pwm/therm# r26 10 r27 470 vcc3v q4 npn r21 4.7k r28 10k r30 27k d2 c11 0.1u +12v 1 2 3 jp2 con3 fan circuit for low pwm frequency alert#/tach

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