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? semiconductor components industries, llc, 2001 april, 2001 rev. 1 1 publication order number: max1617/d max1617 smbus temperature sensor with internal and external diode input the max1617 is a serially programmable temperature sensor optimized for monitoring modern high performance cpus with onboard, integrated temperature sensing diodes. temperature data is converted from the cpu's diode outputs and made available as an 8bit digital word. communication with the max1617 is accomplished via the standard system management bus (smbus) commonly used in modern computer systems. this permits reading the current internal/external temperature, programming the threshold setpoints, and configuring the device. additionally, an interrupt is generated on the alert pin when temperature moves outside the preset threshold windows in either direction. a standby command may be sent via the smbus by signaling the stby input to activate the lowpower standby mode. registers can be accessed while in standby mode. address selection inputs allow up to nine max1617s to share the same 2wire smbus for multizone monitoring. all registers can be read by the host, and both polled and interrupt driven systems are easily accommodated. small size, low installed cost, and ease of use make the max1617 an ideal choice for implementing sophisticated system management schemes, such as acpi. features ? includes internal and external sensing capability ? outputs temperature as 8bit digital word ? solid state temperature sensing; 1 c resolution ? 3.05.5 v operating range ? independent internal and external threshold setpoints with alert interrupt output ? smbus 2wire serial interface ? up to 9 max1617s may share the same bus ? low standby power mode ? low power: 70 m a (max) operating, 10 m a (max) standby mode ? 16pin plastic qsop package ? operating temperature range: 55 c to +125 c typical applications ? thermal protection for intel adeschuteso pentium ii ? and other high performance cpus with integrated onboard diode - no sensor mounting problems! ? accurate temperature sensing from any silicon junction diode ? thermal management in electronic systems: computers, network equipment, power supplies 16pin qsop db suffix case tbd preliminary information http://onsemi.com pin configuration device package shipping ordering information max1617dbr2 16pin qsop 2500 tape/reel max1617 1 2 3 4 16 15 14 13 nc v dd d + d nc stby scl nc 5 6 7 8 12 11 10 9 nc add1 gnd gnd sda alert add0 nc (top view)
max1617 http://onsemi.com 2 functional block diagram int. temp ext.temp status byte config. byte conv. rate ext. hi limit ext. lo limit int. hi limit int. lo limit register set modulator internal sensor (diode) control logic smbus interface stby scl sda add 0 add 1 alert d + d absolute maximum ratings* rating symbol value unit power supply voltage v dd 6.0 v voltage on any pin (gnd 0.3 v) to (v dd + 0.3 v) v operating temperature range t a 55 to +125 c storage temperature range t stg 65 to +150 c smbus input/output current 1.0 to +50 ma d input current 1.0 ma maximum power dissipation p d 330 mw * maximum ratings are those values beyond which damage to the device may occur.
max1617 http://onsemi.com 3 pin description pin no. symbol type description 2 v dd power power supply input 3 d + bidirectional current source and a/d positive input 4 d bidirectional current sink and a/d negative input 6, 10 add[1:0] input address select pins (see address decode table) 7, 8 gnd power system ground 11 alert output smbus interrupt (smbalert) or comparator output 12 sda bidirectional smbus serial data 14 scl input smbus serial clock 15 stby input standby enable 1, 5, 9, 13, 16 nc not connected pin description scl input. smbus serial clock. clocks data into and out of the max1617. sda bidirectional. serial data is transferred on the smbus in both directions using this pin. add1, add0 inputs. sets the 7bit smbus address. these pins are atristate,o and the smbus addresses are specified in the address decode table below. ( note: the tristate scheme allows up to nine max1617s on a single bus. a match between the max1617's address and the address specified in the serial bit stream must be made to initiate communication. many smbuscompatible devices with other addresses may share the same 2wire bus. these pins are only active at poweron reset, and will latch into the appropriate states. alert output, open collector, active low. the alert output corresponds to the general smbalert signal and indicates an interrupt event. the max1617 will respond to the standard smbus alert response address when alert is asserted. normally, the alert output will be asserted when any of the following occurs: int_temp equal to or exceeds int_hlim int_temp falls below int_llim ext_temp equal to or exceeds ext_hlim ext_temp falls below ext_llim external diode aopeno the operation of the alert output is controlled by the mask1 bit in the config register. if the mask1 bit is set to a1,o no interrupts will be generated on alert. the alert output is cleared and rearmed by the alert response address (ara). this output may be wireored with similar outputs from other smbus devices. if the alarm condition persists after the ara, the alert output will be immediately reasserted. ( note: a pullup resistor is necessary on alert since it is an opendrain output. current sourced from the pullup resistor causes power dissipation and may cause internal heating of the max1617. to avoid affecting the accuracy of internal temperature readings, the pullup resistors should be made as large as possible.) stby input. the activation of standby mode may be achieved using either the stby pin or the chip stop bit (config register). if stby is pulled low, the max1617 unconditionally enters its lowpower standby mode. the temperaturetodigital conversion process is halted, but alert remains functional. the max1617's bus interface remains active, and all registers may be read from and written to normally. the int_temp and ext_temp registers will contain whatever data was valid at the time of standby. (transitions on sda or scl due to external bus activity may increase the standby power consumption.) d + bidirectional. this pin connects to the anode of the external diode and is the positive a/d input. current is injected into the external diode from the max1617, and the temperature proportional v be is measured and converted to digital temperature data. d bidirectional. this pin connects to the cathode of the external diode. current is sunk from the external diode into the max1617 through this pin. it also is the negative input terminal to the max1617's a/d converter. this node is kept at approximately 0.7 v above ground. v dd input. power supply input. see electrical specifications. gnd input. ground return for all max1617 functions.
max1617 http://onsemi.com 4 dc electrical characteristics (v dd = 3.3 v, 55 c t a 125 c, unless otherwise noted.) characteristic symbol min typ max unit power supply power supply voltage v dd 3.0 5.5 v v dd undervoltage lockout threshold v uvlock 2.4 2.80 2.95 v poweron reset threshold (v dd falling edge) v por 1.0 1.7 2.3 v operating current 0.25 conv./sec rate smbus inactive (1) i dd 70 a operating current 2 conv./sec rate smbus inactive (1) i dd 180 a standby supply current (smbus active) i ddstandby 100 a standby supply current (smbus inactive) i ddstandby 10 a add[1:0] bias current (powerup only) i addbias 160 a alert output output low voltage (i ol = 1.0 ma) (3) v ol 0.4 v add[1:0] inputs logic input low v il v dd x 0.3 v logic input high v ih v dd x 0.7 v stby input logic input low v il v dd x 0.3 v logic input high v ih v dd x 0.7 v temptobits converter basic temperature resolution t res 1.0 c internal diode temperature +60 c t a +100 c 0 c t a +125 c 55 c t a 0 c t ierr 2.0 3.0 3.0 +2.0 +3.0 c external diode temperature +60 c t a +100 c 0 c t a +125 c 55 c t a 0 c t eerr 3.0 5.0 5.0 +3.0 +5.0 c external diode high source current (d + ) (d ) ~ 0.65 v i diodehigh 100 a external diode low source current (d + ) (d ) ~ 0.65 v i diodelow 10 a source voltage v dsource 0.7 v conversion time from chip stop to conv. complete (2) t conv 54 83 112 msec conversion rate accuracy (see conversion rate register desc.) cr 35 +35 % 2wire smbus interface logic input high v ih 2.2 v logic input low v il 0.8 v sda output low i ol = 2 ma (3) i ol = 4 ma (3) v ol 0.4 0.6 v input capacitance sda, scl c in 5.0 pf i/o leakage i leak 1.0 0.1 1.0 a 1. operating current is an average value (including external diode injection pulse current) integrated over multiple conversion cycles. tran sient current may exceed this specification. 2. for true recurring conversion time see conversion rate register description. 3. output current should be minimized for best temperature accuracy. power dissipation within the max1617 will cause selfheatin g and temperature drift error.
max1617 http://onsemi.com 5 smbus port ac timing (v dd = 3.3 v, 55 c (t a = t j ) 125 c; c l = 80 pf, unless otherwise noted.) characteristic symbol min typ max unit smbus clock frequency f smb 10 100 khz low clock period (10% to 10%) t low 4.7 sec high clock period (90% to 90%) t high 4.0 sec smbus rise time (10% to 90%) t r 1,000 nsec smbus fall time (90% to 10%) t f 300 nsec start condition setup time (90% scl to 10% sda) (for repeated start condition) t su(start) 4.0 sec start condition hold time t h(start) 4.0 sec data in setup time t sudata 1,000 nsec data in hold time t hdata 1,250 nsec stop condition setup time t su(stop) 4.0 sec bus free time prior to new transition t idle 4.7 sec ab c def g hijklm i low i high t sudata t hdata t su(start) t h(start) t su(stop) t idle scl sda a = start condition b = msb of address clocked into slave c = lsb of address clocked into slave d = r/w bit clocked into slave e = slave pulls sda line low f = acknowledge bit clocked into master g = msb of data clocked into slave h = lsb of data clocked into slave i = slave pulls sda line low j = acknowledge clocked into master k = acknowledge clock pulse l = stop condition, data executed by slave m= new start condition ab c def g hi jk i low i high t sudata t su(start) t h(start) t su(stop) t idle scl sda a = start condition b = msb of address clocked into slave c = lsb of address clocked into slave d = r/w bit clocked into slave e = slave pulls sda line low f = acknowledge bit clocked into master g = msb of data clocked into master h = lsb of data clocked into master i = acknowledge clock pulse j = stop condition k = new start condition smbus write timing diagram smbus read timing diagram
max1617 http://onsemi.com 6 detailed operating description the max1617 acquires and converts temperature information from two separate sources, both silicon junction diodes, with a basic accuracy of 1 c. one is located on the max1617 die; the other is connected externally. the external diode may be located on another ic die. the analogtodigital converter on the max1617 alternately converts temperature data from the two sensors and stores them separately in internal registers. the system interface is a slave smbus port with an alert (smbalert) interrupt output. the interrupt is triggered when one or more of four preset temperature thresholds are tripped (see figure 1). these four thresholds are userprogrammable via the smbus port. additionally, the temperature data can be read at any time through the smbus port. nine smbus addresses are programmable for the max1617, which allows for a multisensor configuration. also, there is lowpower standby mode where temperature acquisition is suspended. standby mode the max1617 allows the host to put it into a low power (i dd = 10 m a, max) standby mode. in this mode, the a/d converter is halted, and the temperature data registers are frozen. the smbus port operates normally. standby mode can be enabled with either the stby input pin or the chip stop bit in the config register. the following table summarizes this operation. standby mode operation stby chip stop bit one shot? operating mode 0 don't care don't care standby 1 0 don't care normal 1 1 no standby 1 1 yes normal (1 conversion only, then standby) figure 1. temperature vs. setpoint event generation temperature assert ext_hlim alert ext_temp alert assert alert assert alert time int_temp int_hlim ext_llim int_llim setpoints note: this diagram implies that the appropriate setpoint is moved, temporarily, after each alert event to suppress reassertion of alert immediately after the ara/deassertion. assert alert smbus slave address the two pins add1 and add0 are tristate input pins which determine the 7bit smbus slave address of the max1617. the address is latched during por. address decode table add0 add1 smbus address 0 0 0011 000 0 open (3state) 0011 001 0 1 0011 010 open (3state) 0 0101 001 open (3state) open (3state) 0101 010 open (3state) 1 0101 011 1 0 1001 100 1 open (3state) 1001 101 1 1 1001 110
max1617 http://onsemi.com 7 figure 2. max1617 functional description flowchart por*, initialize all registers stby mode active? start internal stby conversion status [d7] active? yes no yes yes one stby perform one stop conv., reset status d[7] shot? yes no no conversion cycle eoc*? yes no no no yes thermal stby active? yes no ext. diode yes open? trip? update start external int_temp conversion eoc*? rest one shot? period over? no yes no no yes yes no yes yes no monitor smbus status yes read/ valid ara*? alert address config update reset set appropriate enable rest period disable and rearm ara* bus win execute match? read? write? command? status read released? ext_temp thermal trip? [d7] active? alert, send local address to host according to conv_rate register status bit d[7] status bit d[6:2] arbitration? arbitration? active ? no alert# for start condition and clear status execute smbus read execute smbus write no no no no no read write yes yes yes yes yes * por = power on reset; ara = alert response address; eoc = end of conversion
max1617 http://onsemi.com 8 serial port operation the serial clock input (scl) and bidirectional data port (sda) form a 2wire bidirectional serial port for programming and interrogating the max1617. the following conventions are used in this bus architecture. (see smbus write/read timing diagram.) all transfers take place under control of a host, usually a cpu or microcontroller, acting as the master, which provides the clock signal for all transfers. the max1617 always operates as a slave. the serial protocol is illustrated in figure 3. all data transfers have two phases; all bytes are transferred msb first. accesses are initiated by a start condition (start), followed by a device address byte and one or more data bytes. the device address byte includes a read/write selection bit. each access must be terminated by a stop condition (stop). a convention called acknowledge (ack) confirms receipt of each byte. note that sda can change only during periods when scl is low (sda changes while scl is high are reserved for start and stop conditions.) max1617 serial bus conventions term explanation transmitter the device sending data to the bus. receiver the device receiving data from the bus. master the device which controls the bus: initiating transfers (start), generating the clock, and terminating transfers (stop). slave the device addressed by the master. start a unique condition signaling the beginning of a transfer indicated by sda falling (high low) while scl is high. stop a unique condition signaling the end of a transfer indicated by sda rising (low high) while scl is high. ack a receiver acknowledges the receipt of each byte with this unique condition. the receiver drives sda low during scl high of the ack clockpulse. the master pro- vides the clock pulse for the ack cycle. busy communication is not possible because the bus is in use. not busy when the bus is idle, both sda and scl will remain high. data valid the state of sda must remain stable dur- ing the high period of scl in order for a data bit to be considered valid. sda only changes state while scl is low during nor- mal data transfers (see start and stop conditions). start condition (start) the max1617 continuously monitors the sda and scl lines for a start condition (a high to low transition of sda while scl is high), and will not respond until this condition is met. (see smbus write/read timing diagram.) address byte immediately following the start condition, the host must transmit the address byte to the max1617. the states of add1 and add0 during powerup determine the 7bit smbus address for the max1617. the 7bit address transmitted in the serial bit stream must match for the max1617 to respond with an acknowledge (indicating the max1617 is on the bus and ready to accept data). the eighth bit in the address byte is a readwrite bit. this bit is 1 for a read operation or 0 for a write operation. acknowledge (ack) acknowledge (ack) provides a positive handshake between the host and the max1617. the host releases sda after transmitting eight bits, then generates a ninth clock cycle to allow the max1617 to pull the sda line low to acknowledge that it successfully received the previous eight bits of data or address. data byte after a successful ack of the address byte, the host must transmit the data byte to be written or clock out the data to be read. (see the appropriate timing diagrams.) ack will be generated after a successful write of a data byte into the max1617. stop condition (stop) communications must be terminated by a stop condition (a low to high transition of sda while scl is high). the stop condition must be communicated by the transmitter to the max1617. (see smbus write/read timing diagram.)
max1617 http://onsemi.com 9 figure 3. smbus protocols data s address wr ack 7 bits command data p 8 bits ack ack s address wr ack 7 bits command rd nack 8 bits s address 7 bits ack ack 8 bits p s address wr ack 7 bits command 8 bits p ack data rd nack s address 7 bits ack 8 bits p slave address command byte: selects data byte: data goes which register you writing to. into the register set by the command byte. slave address command byte: selects which register you reading from. slave address: repeated due to change in data flow direction. data byte: reads from the register set by the command byte. command byte: sends command with no data, usually used for oneshot data byte: reads data from the register commanded by the last read byte. command. s = start condition p = stop condition shaded = slave transmission write byte format read byte format send byte format receive byte format 8 bits register set and programmer's model max1617 command set the max1617 supports four smbus command protocols. these are read_byte, write_byte, send_byte, and receive_byte. see system management bus specification rev. 1.0 for details. command byte description command code function rit 00h read internal temp (int_temp) ret 01h read external temp (ext_temp) rs 02h read status byte (status) rc 03h read configuration byte (config) rcr 04h read conversion rate byte (conv_rate) rihl 05h read internal high limit (int_hlim) rill 06h read internal low limit (int_llim) rehl 07h read external high limit (ext_hlim) rell 08h read external low limit (ext_llim) wc 09h write configuration byte (config) wcr 0ah write conversion rate byt3 (conv_rate) wihl 0bh write internal high limit (int_hlim) will 0ch write internal low limit (int_llim) wehl 0dh write external high limit (ext_hlim) well 0eh write external low limit (ext_llim) osht 0fh one shot temp measurement rmid feh read manufacturer id (mfr_id) rmrev ffh read manufacturer revision number (mfr_rev) note: proper device operation is not guaranteed if undefined locations (10h to fdh) are addressed. in case of erroneous smbus operation (receive_byte command issued immediately after write_byte command) the max1617 will acknowledge the address and return 1111 1111b to signify an error. under no condition will it implement an smbus atimeout.o
max1617 http://onsemi.com 10 configuration register (config), 8bits, read/write configuration register (config) d[7] d[6] d[5] d[4] d[3] d[2] d[1] d[0] mask1 chip stop reserved bit por state function operation d[7] 0 interrupt mask (see text) 1 = mask alert 0 = don't mask alert d[6] 0 standby switch 1 = standby, 0 = normal d[5]d[0] 0 reserved always returns zero when read. n/a a/d conversion rate register (conv_rate), 8bits, read/write a/d conversion rate register (conv_rate) d[7] d[6] d[5] d[4] d[3] d[2] d[1] d[0] reserved msb x lsb bit por state function operation d[7:3] 0 reserved always re- turns zero when read. n/a d[2:0] 010b conversion rate bits. see below. a/d conversion rate selection d2 d1 d0 conversion rate samples/sec 0 0 0 0.0625 0 0 1 0.125 0 1 0 0.25 0 1 1 0.5 1 0 0 1.0 1 0 1 2.0 1 1 0 4.0 1 1 1 8.0 note: conversion rate denotes actual sampling of both internal and external sensors. temperature registers, 8bits, readonly (int_temp, ext_temp) the binary value (2's complement format) in these two registers represents temperature of the internal and external sensors following a conversion cycle. the registers are automatically updated in an alternating manner. internal temperature register (int_temp) d[7] d[6] d[5] d[4] d[3] d[2] d[1] d[0] msb x x x x x x lsb external temperature register (ext_temp) d[7] d[6] d[5] d[4] d[3] d[2] d[1] d[0] msb x x x x x x lsb in the two temperature data and four threshold setpoint registers, each unit value represents one degree (celsius). the value is in 2'scomplement binary format such that a reading of 00000000b corresponds to 0 c. examples of this temperaturetobinary value relationship are shown in the following table. temperaturetodigital value conversion (int_temp, ext_temp, int_hlim, int_llim,ext_hlim, ext_llim) actual temperature rounded temperature binary value hex value +130.00 c +127 c 01111111 7f +127.00 c +127 c 01111111 7f +126.50 c +127 c 01111111 7f +25.25 c +25 c 00011001 19 +0.50 c +1 c 00000001 01 +0.25 c 0 c 00000000 00 0.00 c 0 c 00000000 00 0.25 c 0 c 00000000 00 0.50 c 0 c 00000000 00 0.75 c 1 c 11111111 ff 1.00 c 1 c 11111111 ff 25.00 c 25 c 11100111 e7 25.25 c 25 c 11100110 e7 54.75 c 55 c 11001001 c9 55.00 c 55 c 11001001 c9 65.00 c 65 c 10111111 bf temperature threshold setpoint registers, 8bits, readwrite (int_hlim, int_llim, ext_hlim, ext_llim) these registers store the values of the upper and lower temperature setpoints for event detection. the value is in 2'scomplement binary. int_hlim and int_llim are compared with the int_temp value, and ext_hlim and ext_llim are compared with ext_temp. these registers may be written at any time. internal high limit setpoint register (int_hlim) d[7] d[6] d[5] d[4] d[3] d[2] d[1] d[0] msb x x x x x x lsb internal low limit setpoint register (int_llim) d[7] d[6] d[5] d[4] d[3] d[2] d[1] d[0] msb x x x x x x ls external high limit setpoint register (ext_hlim) d[7] d[6] d[5] d[4] d[3] d[2] d[1] d[0] msb x x x x x x lsb external low limit setpoint register (ext_llim) d[7] d[6] d[5] d[4] d[3] d[2] d[1] d[0] msb x x x x x x lsb note: por states: int_hlim 01 111111b +127 c int_llim 11001001b 55 c ext_hlim 01 111111b +127 c ext_llim 11001001b 55 c
max1617 http://onsemi.com 11 status register (status) d[7] d[6] d[5] d[4] d[3] d[2] d[1] d[0] busy flag1 flag2 flag3 flag4 flag5 flag6 re- served bit(s) por state function operation* d[7] 0 signal a/d converter is busy. 1 = a/d busy, 0 = a/d idle d[6] 0 interrupt flag for int_hlim event 1 = interrupt occurred, 0 = none d[5] 0 interrupt flag for int_llim event 1 = interrupt occurred, 0 = none d[4] 0 interrupt flag for ext_hlim event 1 = interrupt occurred, 0 = none d[3] 0 interrupt flag for ext_llim event 1 = interrupt occurred, 0 = none d[2] 0 external diode afaulto flag 1 = external diode fault 0 = external diode ok d[1:0] 0 reserved always returns zero. n/a note: all status bits are cleared after a read operation is performed on status. the ext_temp register will read +127 c if an external diode aopeno is detected. manufacturer's identification register (mfr_id), 8bits, read only: manufacturer's identification register (mfr_id) d[7] d[6] d[5] d[4] d[3] d[2] d[1] d[0] msb x x x x x x lsb manufacturer's revision register (mfr_rev), 8bits, read only: manufacturer's revision register (mfr_rev) d[7] d[6] d[5] d[4] d[3] d[2] d[1] d[0] msb x x x x x x lsb register set summary: the max1617's register set is summarized in the following table. all registers are 8bits wide. name description por state read write int_temp internal sensor temperature (2's complement) 0000 0000b* ext_temp external sensor temperature (2's complement) 0000 0000b* status status register 0000 0000b config config register 0000 0000b conv_rate a/d conversion rate register 0000 0010b int_hlim internal high limit (2's complement) 0111 1111b int_llim internal low limit (2's complement) 1100 1001b ext_hlim external high limit (2's complement) 0111 1111b ext_llim external low limit (2's complement) 1100 1001b mfr_id ascii for letter ato 0101 0100b mfr_rev serial device revision # ** critical critical limit (2's complement) n/a *** * note: the int_temp and ext_temp register immediately will be updated by the a/d converter after por. if stby is low at powerup, int_temp and ext_temp will remain in por state (0000 0000b). **mfr_rev will sequence 01h, 02h, 03h, etc. by mask changes. ***critical only can be written via the crit[1:0] pins. it cannot be accessed through the smbus port.
max1617 http://onsemi.com 12 package dimensions 16pin qsop plastic package case tbd issue tbd .069 (1.75) .012 (0.31) .008 (0.21) .025 pin 1 .197 (4.98) .189 (4.80) 8 .157 (3.99) .150 (3.81) .244 (6.20) .228 (5.80) .053 (1.35) .010 (0.25) .004 (0.10) (0.635) typ. .010 (0.25) .007 (0.19) .050 (1.27) .016 (0.41) max. dimensions: inches (mm) on semiconductor and are trademarks of semiconductor components industries, llc (scillc). scillc reserves the right to make changes without further notice to any products herein. scillc makes no warranty, representation or guarantee regarding the suitability of its products for any particular purpose, nor does scillc assume any liability arising out of the application or use of any product or circuit, and specifically disclaims any and all liability, including without limitation special, consequential or incidental damages. atypicalo parameters which may be provided in scill c data sheets and/or specifications can and do vary in different applications and actual performance may vary over time. all operating parameters, including atypicalso must be validated for each customer application by customer's technical experts. scillc does not convey any license under its patent rights nor the rights of others. scillc products are not designed, intended, or authorized for use as components in systems intended for surgical implant into the body , or other applications intended to support or sustain life, or for any other application in which the failure of the scillc product could create a sit uation where personal injury or death may occur. should buyer purchase or use scillc products for any such unintended or unauthorized application, buyer shall indemnify and hold scillc and its officers, employees, subsidiaries, affiliates, and distributors harmless against all claims, costs, damages, and expenses, and reasonable attorney fees arising out of, directly or indirectly, any claim of personal injury or death associated with such unintended or unauthori zed use, even if such claim alleges that scillc was negligent regarding the design or manufacture of the part. scillc is an equal opportunity/affirmative action employer. publication ordering information central/south america: spanish phone : 3033087143 (monfri 8:00am to 5:00pm mst) email : onlitspanish@hibbertco.com tollfree from mexico: dial 018002882872 for access then dial 8662979322 asia/pacific : ldc for on semiconductor asia support phone : 13036752121 (tuefri 9:00am to 1:00pm, hong kong time) toll free from hong kong & singapore: 00180044223781 email : onlitasia@hibbertco.com japan : on semiconductor, japan customer focus center 4321 nishigotanda, shinagawaku, tokyo, japan 1410031 phone : 81357402700 email : r14525@onsemi.com on semiconductor website : http://onsemi.com for additional information, please contact your local sales representative. max1617/d north america literature fulfillment : literature distribution center for on semiconductor p.o. box 5163, denver, colorado 80217 usa phone : 3036752175 or 8003443860 toll free usa/canada fax : 3036752176 or 8003443867 toll free usa/canada email : onlit@hibbertco.com fax response line: 3036752167 or 8003443810 toll free usa/canada n. american technical support : 8002829855 toll free usa/canada europe: ldc for on semiconductor european support german phone : (+1) 3033087140 (monfri 2:30pm to 7:00pm cet) email : onlitgerman@hibbertco.com french phone : (+1) 3033087141 (monfri 2:00pm to 7:00pm cet) email : onlitfrench@hibbertco.com english phone : (+1) 3033087142 (monfri 12:00pm to 5:00pm gmt) email : onlit@hibbertco.com european tollfree access*: 0080044223781 *available from germany, france, italy, uk, ireland

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