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F75395 ? 1 o c temperature sensor with ? compensation release date: may, 2008 revision: v0.15p
F75395 F75395 may, 2008 v0.15p -i- F75395 datasheet revision history version date page revision history v0.10p 2007/7/30 - preliminary version v0.11p 2007/8/7 - add function description v0.12p 2007/9/20 - add register description v0.13p 2008/1/8 - F75395 won?t provide sop package in the future. - add ordering information. - add electrical characteristic v0.14p 2008/1/29 - modify typo. v0.15p 2008/5/29 5 modify typo. of ch apter 6.4 for temperature range table 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.
F75395 F75395 may, 2008 v0.15p -ii- table of contents 1. general description ................................................................................................................. 1 2. features ............................................................................................................................... ... 1 3. key specifications ................................................................................................................... 2 4. pin configuration ..................................................................................................................... 2 5. pin descriptions ...................................................................................................................... 2 6. functional description ............................................................................................................. 3 6.1 general descr iption ......................................................................................................... 3 6.2 the warning message ..................................................................................................... 3 6.3 access inte rface .............................................................................................................. 4 6.4 temperature m onitoring................................................................................................... 5 6.5 alert# ......................................................................................................................... ...... 6 6.6 therm#......................................................................................................................... .6 6.7 adc conversion sequence............................................................................................. 6 6.8 thermal mass and se lf heating ...................................................................................... 7 6.9 adc noise f ilterin g ......................................................................................................... 7 6.10 beta compens ation ......................................................................................................... 7 6.11 resistor cancel led func tion............................................................................................ 8 6.12 pcb layout guide........................................................................................................... 8 7. register de scripti on ........................................................................................................... ..... 9 7.1 configuration register ? index 03h(read), 09h(write)................................................ 9 7.2 status register ? index 02h ......................................................................................... 10 7.3 conversion rate register ? index 04h(read), 0ah(writ e) .......................................... 10 7.4 one-shot register ? index 0fh ................................................................................... 10 7.5 alert queue & timeout register ? index 22h............................................................... 11 7.6 status-with-ara control register ? index 24h............................................................. 11 7.7 beta compensation register ? index 3bh ..................................................................... 11 7.8 sst address register ? index 3dh................................................................................ 11 7.9 chip id (msb) register ? index 5a h ............................................................................. 12 7.10 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) register ? index fe h.......................................... 12 7.14 value ram ? index 10h- 2fh ....................................................................................... 12 7.15 sst command table..................................................................................................... 13 8. electrical c haracteri stic...................................................................................................... .... 14
F75395 F75395 may, 2008 v0.15p -iii- 8.1 absolute ma ximum ra tings .............................................................................................. 14 8.2 dc charac teristics ......................................................................................................... ... 14 8.3 ac charac teristics ......................................................................................................... ... 16 9. ordering in formati on ........................................................................................................... .. 16 10. package dim ensi ons............................................................................................................. 17 11. applicatio n circuit............................................................................................................ ...... 18
F75395 F75395 may, 2008 v0.15p -1- 1. general description the F75395 is a temperature sensor ic with ? compens ation and alert signal which is specific designed for notebook, graphic cards etc. an 11-bit analog-to-d igital 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 an d 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 ? of cpu. the users can set up the upper and lower limits (alarm thresholds) of all monitored parameters and this chip can also issue warning messages for system protection when there is something wrong with monitored items. through the bios or application software, the users c an read all the monitored parameters of system all the time. and a pop-up warning can be also acti vated when the monitored item was out of the proper/pre-setting range. the application software could be fintek's application utilit y, or other management application software. the F75395 is in the green package of 8-pin msop and powered by 3.3v. 2. features ? provide 1 on-chip local and 1 remote temperature sensing ? ? 1 o c accuarcy on remote channel and ? 3 o c accuarcy on local channel ?o ? 1 o c ( + 60 o c to +100 o c, remote) ?o ? 3 o c ( + 60 o c to +100 o c, local) ? support new generational cpu temperature sensing with ? compensation ? resistor cancelled function ? alert# output for smbus alert ? programmable alert queue ? programmable limited and setting points(ale rt threshold) for all monitored items ? provide sst and 2-wire smbus interfaces for temperature reading by host ? 3vcc operation ? 8-msop package ? F75395m ? the sst slave address: 0x4ch ? the F75395 provides smbus address id option by resi stor selection and they have the following smbus slave address: (default address is 98h) resistor a6 a5 a4 a3 a2 a1 a0 1k 1 0 0 1 1 1 1 4.7k 1 0 0 1 1 0 1 noted: patented tw 235231 twi263778
F75395 F75395 may, 2008 v0.15p -2- 10k 1 0 0 1 1 1 0 20k 0 1 1 0 1 1 0 30k 0 1 1 0 1 0 1 47k 0 1 1 0 1 0 0 3. key specifications ? supply voltage 3.0~3.6v ? supply current 180 ua (typ) 4. pin configuration 5. pin descriptions i/o 12t - ttl level bi-directional pin with 12 ma source-sink capability i/o 12ts - ttl level and schmitt trigger o 12 - output pin with 12 ma source-sink capability
F75395 F75395 may, 2008 v0.15p -3- o 24v4 - output pin with 24 ma source-sink capability, output 4v aout - output pin(analog) od 12 - open-drain output pin with 12 ma sink capability in t - ttl level input pin in ts - ttl level input pin and schmitt trigger i lv /o d8-s1 - low level bi-directional pin(vih ? 0.9v, vil ? 0.6v.). output with 8ma drive and 1ma sink capability. ain - input pin(analog) pin no pin name type pwr description 1 vcc pwr 3vcc power pin 2 d+ ain 3vcc positive connection to remote tem perature sensor (ex: thermal diode anode) 3 d- ain 3vcc negative connection to remote te mperature sensor(ex: thermal diode cathode) 4 sst i lv /o d8-s1 3vcc intel sst hardware monitor interface. 5 gnd pwr 3vcc ground 6 alert# od 12 3vcc active low output. used as smbus alert or interrupt 7 sda in ts /od 12 3vcc serial bus data 8 scl in ts 3vcc serial bus clock 6. 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 lim its 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. 6.2 the warning message pin4 and pin6 act as warning message when the te mperature exceeds it threshold point.
F75395 F75395 may, 2008 v0.15p -4- 6.3 access interface the F75395 can be connected to a compatible 2-wire serial syst em management bus as a slave dev ice 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 calcul ated using crc-8. for detail information about pec, please check smbus 1.1 specification. F75395 supports 25ms timeout for no activity on the smbus. th is timeout function is programmed at 22h bit7 and default is disabled. F75395 also supports alert res ponse address (ara) protocol. the operation of the protocol is described wi th details in the following sections. (a) smbus write to internal address re gister followed by the data byte 0 start by master 0 1 011 00 d7 d6 d5 d4 d3 d2 d1 d0 ack by 395 r/w ack by 395 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 395 r/w ack by 395 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 intern al 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 395 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
F75395 F75395 may, 2008 v0.15p -5- 0 start by master 00011 00 01001100 ack by master r/w ack by 395 scl sda 780 78 0 frame 2 device address frame 1 alert response address figure 4. alert response address stop by master the F75395 provides smbus address option func tion. pull high register (alert pin) to select smbus address by power on strapping and entry key writing. these two conditions must be done both fo r address selection. if you only option pull high register with out entry key writing, the address will keep default value 98h. for example, use 30k resistor for address 6a selection. user need to write entry key to register crfah. ex: original chip default address is 98h bus access byte write (98, fa, 19) bus access byte write (98, fa, 34) bus access byte write (98, fa, 01) after entry key writing, chip address will change to 6ah. 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 inte rface. (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). 6.4 temperature monitoring the F75395 monitors a local and a remote temperature sensor. both can be measured from -40c to 127.875c. the temperature format is as the following table: temperature ( high byte ) digital output temperature ( low byte ) digital output -40c 1101 1000 -0.875c 001 0 0000 -20c 1110 1100 -0.325c 110 0 0000 -1c 1111 1111 -0. 125c 111 0 0000 0c 0000 0000 0c 000 0 0000 50c 0011 0010 0.375c 011 0 0000 75c 0100 1011 0.500c 100 0 0000 100c 0110 0100 0.750c 110 0 0000 127c 0111 1111 0.875c 111 0 0000
F75395 F75395 may, 2008 v0.15p -6- remote-sensor transistor manufacturers manufacturer model number panasonic 2sb0709 2n3906 philips pmbt3906 6.5 alert# five events can trigger alert# to low: (1). vt1(local) temperat ure exceeds high limit (2). vt1(local) temperature goes below low limit (3). vt2(remote) temperature exceeds high limit (4). vt2(remote) temperature goes below low limit (5). vt2(remote) temperature is open-circuit. these five events are wired-nor together. this means that when o ne of out-of-limit event occurs, the alert# output goes low if the mask control is disabled. alert# signal can be used as an irq-like interrupt or as an smbalert. when alert# acts as an irq-like interrupt, the alert# will be de-asserted until the following 2 conditions are matched: (1). the abnormal condition is gone (2). reading the status register to clear the status when alert# acts as a smbalert, the alert# will be de-asserted until the following 3 conditions are matched: (1). the abnormal condition is gone (2). reading the status register to clear the status (3). the alert# has been serviced by the smbus master reading the device address. for more information about smbalert, pl ease see smbus 1.1 specification. 6.6 therm# either vt1(local) or vt2(remote) temper ature exceeds the corresponding therm limit, the therm# output will assert low. the asserted output will be de-asserted until the temperature goes below (therm limit ? hysteresis). the hysteresis default value i s 10c and it can be programmed. both vt1 and vt2 have their own therm limits and hysteresis values. 6.7 adc conversion sequence 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 t he device is actually performing a new conversion; however, even i f the adc is busy, the results of the previ ous conversion are always available.
F75395 F75395 may, 2008 v0.15p -7- 6.8 thermal mass and self heating thermal mass effect can seriously degrade the F75395?s effective a ccuracy. the thermal time constant of the msop package is about 140 in still air. for the F75395 junction temperature to se ttle to within +1c after a sudden +100c change requires abou t five time constants or 12 minutes. the use of sma ller packages for remote sensors such as sot 23, improves the situation. take care t o account for thermal gradients between the heat source and the sensor package do not interfere with measurement accuracy. sel-heating does not significantly affect measurement accuracy. remote sensor self-heating due to the diode current source is negligible. for the local diode, the worst case error occurs wh en auto-converting at the fastes t rate and simultaneously sinkin g maximum current at the alert# output. for instance, at an 64hz rate and alert# sink around 0.7ma when pull up resistor 4.7k ohm to 3.3vcc, the typical power dissipation is vcc x 220 ua plus 0.4v x 0.7ma. package c ja is about 120 c/w, so with vcc = 3.3v and no copper pc board heat-sinking, the resulting temperature rise is: dt = 1.01mw x 120 c/w = 0.12 c even with these contrived circumst ances, it is difficult to introduc e significant self-heating errors. 6.9 adc noise filtering the adc is integrating type with inherently good noise rejecti on. micro-power operation places constraints on high-frequency no ise rejection; therefore, careful pcb board layout and suitable exte rnal filtering are required for high-accuracy remote measuremen t in electronically noisy environment. high frequency emi is best filtered at d+ and d- with an external 2200pf capacitor. too high capacitance may introduce errors due to the rise time of the sw itched current source. nearly all noise sources tested cause the adc measurement to be higher than the actual te mperature, depending on the frequency and amplitude. 6.10 beta compensation the F75395 is configured to detect the temperature of diodes (e.g. 2n3906) or cpu thermal di odes. the diode can be connected in different way as below figure. the basic of the temperature sensor fo llows mathematical formula as below: d+ d- d+ d- substrate pnp transistor i.e. cpu discrete pnp transistor i.e. 2n3906
F75395 F75395 may, 2008 v0.15p -8- 2 2 2 1 1 1 2 1 1 1 ln ln ic ic q kt ie ie q kt v be ? ? ? ? ? ? ? ? + ? ? ? ? ? ? ? ? + = = ? the F75395 measures temperature from the thermal diodes by th e basic. in traditional case, the F75395 outputs dual currents to a thermal diode. then the F75395 calculates the absolute temperature by ? v be . for discrete transistor (i.e. 2n3906), the beta is normally very high such that the percent change in beta is very small. for example, 15% variation in beta for two forced i e currents and the beta is 50 would contribute about 0.32 j error per 100 j . for substrate pnp transistor (i.e. cpu), the beta is very small such that the proportional beta variation will very high, and it will cause large error in temperature measurement. for example , 15% variation in beta for two forced i e currents and the beta is 0.5 would contribute about 11.12 j error per 100 j . in order to solve the second issue, the F75395 provides a beta co mpensation solution for accurate temperature sensing. there is a register (cr30h bit7) for external thermal diode selection by beta variation. if this bit is enabled, the beta compensation wil l automate to measure the temperature from substrate transistor (i.e. cpu). the F75395 can support the beta range from 0.05~1.8 f or beta compensation. in this new method, the F75395 will provide two i e currents, and feedback two i b currents. the F75395 will auto-adjust i e (i e1 and i e2 ) current and feedback i b (i b1 and i b2 ) promptly for getting proper i c proportion (i c1 / i c2 ), then calculates the accurate temperature. this algorithm of beta compensation is suitable for substrate transistor or new generational cpu (i.e. 45 nm cpu) because small beta and high proportional beta variation. the default value of regi ster cr3bh bit7 is enabled for measure substrate transistor. if user would like to detect discrete transistor and the beta is big enough, please di sable this bit for detecting. about this section application, please refer the register description for detail. 6.11 resistor cancelled function the f75393/f75394 can cancel resistor effect from cpu internal circuit or pcb circuit. 6.12 pcb layout guide pcb can be electrically noisy environments, and the F75395 is measuring very small voltage from the remote sensor, so care must be taken to minimize noise which is o ccurred at the sensor inputs. the followi ng guideline should be taken to reduce the measurement error of the temperature sensors: 1. place the F75395 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 inches. (typ). this length can be increased if the worst noise sources are avoided. noise sources generally include clock generators, crts, memory buses 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 unde r the tracks if possible. do not route d+ & d- lines next to th e deflection coil of the crt. and also don?t route the trace acros s fast
F75395 F75395 may, 2008 v0.15p -9- digital signals which can eas ily induce bigger error. gnd gnd dxp 10mils 10mils minimum 10mils dxn 10mils 3. use wide tracks to minimize induct ance and reduce noise pickup. 10 mil track minimum width and spacing is recommended. 4. try to minimize the number of copper/sol der joints, which can cause thermocouple ef fects. where copper/solder joints are use d, 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 200v j . 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 vcc pin. in very noisy environments, place an external 2200pf input filter capacitors across d+, d- close to the F75395. 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 switched current sour ces, excessive cable and/or filter capacitance will affect the measurement accuracy. when using long cables, the filter capa citor may be reduced or remov ed. cable resistance can also induce errors. 1 ? series resistance introduces about 0.5 er j ror. 7. register description 7.1 configuration register ? index 03h(read), 09h(write) bit name r/w default description 7 alert_mask r/w 0 set to 1, mask alert# signal output. 6 run_stop r/w 0 set to 0, monitor. set to 1, stop monitor (power down mode). 5-1 reserved ro 0 reserved, always return 0. 0 pwr_don r/w 0 power down this device.
F75395 F75395 may, 2008 v0.15p -10- 7.2 status register ? index 02h bit name r/w default description 7 adc_busy ro 0 set to 1, adc is converting. 6 vt1high ro 0 set to 1, vt1 temperature exceeds high limit. set to 0, vt1 temperature does not exceed high limit. 5 vt1low ro 0 set to 1, vt1 temperature goes below low limit. set to 0, vt1 temperature does not goes below low limit. 4 vt2high ro 0 set to 1, vt2 temperature exceeds high limit. set to 0, vt2 temperature does not exceed high limit. 3 vt2low ro 0 set to 1, vt2 temperature goes below low limit. set to 0, vt2 temperature does not goes below low limit. 2 open ro 0 set to 1, vt2 is open-circuit. 1 vt2therm ro 0 set to 1, vt2 temperature exceeds its therm limit. 0 vt1therm ro 0 set to 1, vt1 temperature exceeds its therm limit. vt1 (local); vt2 (remote) 7.3 conversion rate register ? index 04h(read), 0ah(write) bit name r/w default 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 64 7-0 conv_rate r/w 08h 05h 2 0bh ~ ffh reserved 7.4 one-shot register ? index 0fh bit name r/w default description 7-0 one-shot wo xxh when chip is at standby mode, writing any value to this register will initiate a single conversion a nd comparison cycle. after the single cycle, chip will returns to standby mode.
F75395 F75395 may, 2008 v0.15p -11- 7.5 alert queue & timeout register ? index 22h bit name r/w default description 7 en_i2ctmout r/w 0 set to 1, enable serial interface timeout function. (timeout time = 25ms) set to 0, disable. 6-4 reserved ro 0 3-1 alert_queue r/w 0 this number determines how many abnormal measurements must occur before alert signal is generated. 000 : once 001 : twice 011 : 3 times 111 : 4 times 0 reserved ro 1 always read 1. 7.6 status-with-ara control register ? index 24h bit name r/w default description 7-1 reserved ro 0 reserved 0 en_ara_sts r/w 1 set to 1, alert de-asserted condition is related with ara. set to 0, alert de-asserted condition is not related with ara(alert respon se address). 7.7 beta compensation register ? index 3bh bit name r/w default description 7 beta_en r/w 1 1: enable beta compensation function. 0: disable beta compensation function. 6 bias_sel r/w 0 0: dn pad bias voltage 150mv 1: dn pad bias voltage 220mv 5-4 reserved r/w 0h dummy registers. 3 r_cancelled r/w 1 1: enable resister cancelled function. 0: disable register cancelled function. 2-0 reserved r/w 2h dummy registers. 7.8 sst address register ? index 3dh bit name r/w default description
F75395 F75395 may, 2008 v0.15p -12- 7 reserved ro 0h always return 0 6-0 sst_addr r/w 4ch user can program this byte to change sst address 7.9 chip id (msb) register ? index 5ah bit name r/w default description 7-0 f_chip_id ro 07h fintek chip id 1 7.10 chip id (lsb) register ? index 5bh bit name r/w default description 7-0 f_chip_id ro 07h fintek chip id 2 7.11 fintek vendor id (msb) (manufacturer id) register ? index 5dh bit name r/w default description 7-0 f_vendor_id ro 19h fintek vendor id 1 7.12 fintek vendor id (lsb) (manufacturer id) register ? index 5eh bit name r/w default description 7-0 f_vendor_id ro 34h fintek vendor id 2 7.13 fintek vendor id ii (m anufacturer id) register ? index feh bit name r/w default description 7-0 vendor_id r/w 23h vendor id 7.14 value ram ? index 10h- 2fh vt1 : local temperature vt2 : remote temperature the value in quota is its power-on default value . description attribute read address (high byte) read address (low byte) write address (high byte) write address (low byte) vt1 reading ro 00h 1ah
F75395 F75395 may, 2008 v0.15p -13- vt2 reading ro 01h 10h vt1 high limit r/w 05h (55h) 1bh (00h) 0bh 1bh vt1 low limit r/w 06h (00h) 1ch (00h) 0ch 1ch vt2 high limit r/w 07h (55h) 13h (00h) 0dh 13h vt2 low limit r/w 08h (00h) 14h (00h) 0eh 14h vt1 therm limit r/w 20h (55h) 20h vt1 therm hysteresis r/w 21h (0ah) 21h vt2 therm limit r/w 19h (55h) 19h vt2 therm hysteresis r/w 23h (0ah) 23h vt1 offset r/w 1dh (00h) 1eh (00h) 1dh 1eh vt2 offset r/w 11h (00h) 12h (00h) 11h 12h 7.15 sst command table command wl/rl/cc description getexttemp() 0x01/0x02/0x01 use 0x4c sst addr ess (default cr3d) and command 0x01 to get F75395 external temperature. getinttemp() 0x01/0x02/0x02 use 0x4c sst addr ess (default cr3d) and command 0x02 to get F75395 internal temperature. getalltemp() 0x01/0x04/0x01 returns a 4-byte block of data. getdib() 0x01/0x08/0xf7 0x01/0x10/0xf7 8 bytes of dib information. 16 bytes of dib information.
F75395 F75395 may, 2008 v0.15p -14- 8. electrical characteristic 8.1 absolute maximum ratings parameter rating unit power supply voltage -0.5 to 5.5 v input voltage -0.5 to vdd+0.5 v operating temperature 0 to 70 c storage temperature -55 to 150 c note: exposure to conditions beyond those listed under abso lute maximum ratings may adversely affect the life and reliability of the device 8.2 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 < 100 o c, vcc = 3.0v to 3.6v -40 o c F75395 F75395 may, 2008 v0.15p -15- (t a = 0 c to 70 c, vdd = 3.3v 10%, vss = 0v) parameter sym. min. typ. max. unit conditions i/o 12t - ttl level bi-directional pin with source-sink capability of 12 ma input low voltage vil 0.8 v input high voltage vih 2.0 v output low current iol 10 12 ma vol = 0.4v output high current ioh -12 -10 ma voh = 2.4v input high leakage ilih +1 a vin = vdd input low leakage ilil -1 a vin = 0v i/o 12ts - ttl level bi-directiona l pin with source-sink capability of 12 ma and schmitt-trigger level input input low threshold voltage vt - 0.5 0.8 1.1 v vdd = 3.3 v input high threshold voltage vt + 1.6 2.0 2.4 v vdd = 3.3 v output low current iol 10 12 ma vol = 0.4 v output high current ioh -12 -10 ma voh = 2.4v input high leakage ilih +1 a vin = vdd input low leakage ilil -1 a vin = 0v out 12t - ttl level output pin with source-sink capability of 12 ma output low current iol 12 16 ma vol = 0.4v output high current ioh -14 -12 ma voh = 2.4v od 16 - open-drain output pin with sink capability of 16 ma output low current iol 12 16 ma vol = 0.4v in ts - ttl level schmitt-triggered input pin input low threshold voltage vt - 0.5 0.8 1.1 v vdd = 3.3v input high threshold voltage vt + 1.6 2.0 2.4 v vdd = 3.3v input high leakage ilih +1 a vin = vdd input low leakage ilil -1 a vin = 0 v
F75395 F75395 may, 2008 v0.15p -16- 8.3 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 2 us start condition hold time t hd;sda 300 ns stop condition setup-up time t su;sto 300 ns data to scl setup time t su;dat 50 ns data to scl hold time t hd;dat 5 ns scl and sda rise time t r 300 ns 9. ordering information part number package type production flow F75395m 8-msop green package commercial, 0 c to +70 c
F75395 F75395 may, 2008 v0.15p -17- 10. package dimensions 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 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
may, 2008 v0.15p -18- 11. application circuit tit le size document number rev date: sheet of F75395 application circuit feature integration technology custom 11 thursday , may 29, 2008 vcc 1 d+ 2 d- 3 sst 4 gnd 5 alert# 6 sda 7 scl 8 u1 F75395 c1 2200pf c2 2200pf r2 4.7k r3 4.7k d+ d+ d+ d+ d+ d+ d+ d+ d+ d+ d+ d+ d+ d+ d+ d+ d+ d+ d+ d+ d+ d+ d+ d+ d+ d+ d+ d+ d+ d+ d+ d+ d+ d+ d+ d+ d+ d+ d+ d+ d+ vcc3v d+ d- c3 0.1u r4 r alert#(pin6)pull-up resistor r4 = 1k i2c address = 9eh sst address = 4dh r4 = 4.7k i2c address = 98h sst address = 4c/30h r4 = 10k i2c address = 9ch sst address = 4bh r4 = 20k i2c address = 6ch sst address = 4ah r4 = 30k i2c address = 6ah sst address = 49h r4 = 47k i2c address = 68h sst address = 48h i2c & sst address trapping : sdata sclk therdc therda 3 1 2 q1a 2n3906 temperature monitor (cpu thermal diode) temperature monitor (2n3906) d+ d+ d+ d+ d+ d+ d+ d+ d+ d+ d+ d+ d+ d+ example 2 : example 1 : r5 100k peci sst sst sst (avoid pre-bios floating)

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