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telefunken semiconductors U3750BM rev. a1: 16.07.1996 1 (20) one chip telephone circuit description telefunken microelectronic's one chip telephone circuit, u 3750 bm, is bicmos integrated circuit that performs all the speech and line interface functions required in an electronic telephone set, the tone ringer, the pulse and dtmf dialling with redial, a keyboard inter- face with the possibility to interface with an external microcontroller using the internal serial bus, and a power supply for peripherals. features adjustable dc slope characteristic adjustable automatic line length receiving and send- ing gain control (not used in dtmf) with the possibility of fixed gain (pabx) adjustable dynamic impedance stabilized power supply for peripherals confidence level during pulse and dtmf dialling receiving amplifier for dynamic or piezo-electric ear pieces high-impedance microphone inputs (80 k in symmetrical and 40 k in asymmetrical) suitable for dynamic, magnetic, piezo-electric or electret micro- phone dynamic limiting in sending (anticlipping) prevents distortion of line signal and sidetone ringing balanced output in hvmos for higher power capability four ringing tones adjustable without external components internal speed up circuit permits a faster charge of v cc and v ram capacitors logic bounce elimination pulse dialling 66/33 or 60/40 or dtmf dialling select- able by programming pin adjustable flashing duration pause function confidence tone (440 hz) last number redial up to 23 digits standard low-cost ceramic 455 khz binary data input in serial mode test-mode capability benefits low number of external components high quality through one chip solution
telefunken semiconductors U3750BM rev. a1: 16.07.1996 2 (20) block diagram
telefunken semiconductors U3750BM rev. a1: 16.07.1996 3 (20) pin description pin symbol function 1 c4 keyboard input 2 c3 keyboard input 3 flash flashing selection 4 dc/fv dialling selection (33/66 pulse, 40/60 pulse or dtmf) 5 ol open line output 6 reset output reset 7 teein test pins 8 shen test pins 9 nc not connected 10 v ram ram and internal logic supply 11 v cc power supply for peripherals 12 v l line voltage 13 oscab test pin 14 ec extra current for peripherals or can be used to dissipate power for high line current applications. 15 testr test pin 16 gnd ground 17 nc not connected 18 aga line length agc adjustment 19 i ref bias adjustment 20 self electronic self input 21 rgab dc characteristic slope adjustment 22 mic 1 microphone input pin symbol function 23 mic 2 microphone input 24 zac dynamic impedance adjustment 25 em/filt first sending stage output 26 mod modulator output 27 em/mf second sending stage input and dtmf input 28 acl anticlipping time constant adjustment 29 e2 receiver output 30 e1 receiver output 31 nc not connected 32 rec receiver input 33 zal sidetone network 34 out1 buzzer output 35 out2 buzzer output 36 vir ringing supply 37 ck ceramic input (455 khz) 38 pair adjustment between two pairs of ringing frequencies 39 beat beat adjustment of each pair of ringing frequencies 40 mf dtmf output 41 c1 keyboard inputs 42 c2 keyboard inputs 43 c6 keyboard inputs 44 c5 keyboard inputs
telefunken semiconductors U3750BM rev. a1: 16.07.1996 4 (20) application circuit absolute maximum ratings see application circuit parameters symbol value unit dc line voltage pin 36 vir 35 v dc line current pin 36 ir 30 ma conversation line voltage pin 12 v l 15 v pulse duration, t = 20 ms v l 17 v conversation line current pin 12 i l 150 ma power dissipation, t amb = 55 c p tot 1 w junction temperature t j 125 c ambient temperature range t amb 25 to +55 c storage temperature range t stg 55 to +155 c
telefunken semiconductors U3750BM rev. a1: 16.07.1996 5 (20) thermal resistance parameters symbol value unit junction ambient r thja 70 k/w electrical characteristics f = 1 khz, f clock = 455 khz, r e = 20 k , t amb = 25 c, unless otherwise specified, q (resonance factor) = 3100, l 1 = 6.1 mh, c 1 = 21 pf, c o = 268.5 pf, r 1 = 5.5 . all resistances are specified at 1%, all capacitance at 2%. parameters test conditions / pins symbol min. typ. max. unit line voltage normal line voltage operation i l = 8 ma i l = 15 ma i l = 28 ma i l = 60 ma figure 3 v l 2.9 4.1 6.4 12.3 4.5 3.6 4.9 7.3 13.7 v stabilized voltage i l = 8 ma, i cc = 0.6 ma i l 28 ma, i cc = 2.1 ma figure 3 v cc 2.0 3.3 2.5 3.5 3.7 v transmission sending gain agc v mi = 2 mv rms (note 1) i l = 28 ma (g s max) i l = 60 ma (g s min) i l = 28 to 60 ma figure 3 g s g s 47 39.5 6 48 41 7 49 42.5 8 db psophometric sending noise v mi = 0, i l = 28 ma figure 3 73 68 dbmp attenuation gain during dialing v mi = 2 mv rms , i l = 28 ma figure 3 a s 63 db microphone input impedance (pins 2223) figure 3 70 120 k common mode rejection ratio i l = 28 ma figure 3 cmrr 80 db from transmission to dialing mode i l = 28 to 60 ma figure 3, pin 25 step 100 +100 mv dynamic limiter (anticlipping) output voltage swing (peak-to-peak value) c acl = 470 nf, r acl = 6.8 m l = 20 ma i l 28 ma, v mi = 8 mv rms figure 3 3.0 2.5 3.6 4.2 v pp overdrive dynamic range line distortion (on 600 ) i l 28 ma figure 3 5 db li ne di s t or ti on ( on 600 ) i l 28 ma v mi = 4.6 mv rms v mi = 8 mv rms v mi = 80 mv rms figure 3 3 5 5 %
telefunken semiconductors U3750BM rev. a1: 16.07.1996 6 (20) unit max. typ. min. symbol test conditions / pins parameters available current close switch s4 i l = 28 ma i l = 60 ma figure 3 pin 14 7.0 35 8 40 ma reception receiving gain g r = v r /v l agc v l = 0.3 v rms i l = 28 ma (g r max) i l = 60 ma (g r min) i l = 28 to 60 ma figure 4 g r g r 10 2.5 6 11 4 7 12 5.5 8 db psophometric receiving noise v l = 0v, i l = 28 ma figure 4 pin 2930 65 dbmp receiving distortion i l = 15 ma, v r = 2.8 v pp i l = 28 ma, v r = 5.5 v pp i l = 60 ma, v r = 5.0 v pp figure 4 3 3 3 % receiver output impedance v r = 50 mv rms , i l = 28 ma figure 4 pin 2930 45 65 85 receiver output offset i l = 28 ma figure 4 pin 2930 650 +650 mv sidestone (v r /v m ) i l = 28 ma figure 3 36 40 db z line matching impedance v l = 0.3 v rms i l = 28 and 60 ma figure 4 580 660 750 ringer turn on voltage measured at pin vir figure 5 v on 16 18.0 v turn off voltage figure 5 v off 9.5 10.5 v current consumption without load vir = 18 v 1.2 1.5 ma output voltage swing load = 10 k figure 5 v out vir2 vp output tone frequencies pin 38 grounded pin 38 open 1458 1166 547 438 hz sweep frequencies pin 39 grounded pin 39 open 4.0 9.1 hz leakage current vir = 30 v ii l at vi l = 0 v pins 38 and 39 figure 5 5 a
telefunken semiconductors U3750BM rev. a1: 16.07.1996 7 (20) unit max. typ. min. symbol test conditions / pins parameters dtmf generation pin 4 grounded tone frequency accuracy (confidence tone included) v ram = 3.5 v 0.4 +0.25 % low group tone level (depends on external components) (note 2) measured on 600 i l = 28 ma figure 3 10 8 6 dbm high group tone level (depends on external components) (note 2) measured on 600 i l = 28 ma figure 3 8 6 4 dbm preemphasis (depends on external components) (note 2) measured on 600 i l = 28 ma figure 3 1 2 3 db dtmf distortion (depends on external components) (note 2 and note 3) measured on 600 i l = 28 ma, 300 < f < 3400 hz figure 3 3.5 % dtmf transmission time dtmf interdigit time t mf t imf 80.2 89.2 82.4 89.2 ms ms transmission mute tm mf 169.4 171.6 ms confidence tone only by serial bus fct frequency 440.9 hz tone level (depends on external components) measured on 600 i l = 25 ma figure 3 9 dbm note 1 : sending gain: g s = v l /v mi with the values of r ag1 and r ag2 (figure 3) so the maximum gain is at 28 ma and the minimum gain is at 60 ma. note 2 : for dtmf measurements, close switches s1 and s3 and select each group of frequencies on the keyboard. note 3 : the level of each harmonic on line is under the limited curve given below with the filter compo- nents value chosen for the test. figure 1
telefunken semiconductors U3750BM rev. a1: 16.07.1996 8 (20) 0.1 1 10 100 60 50 40 30 dbm ( 600 ) f ( khz ) 1000 93 7831 e figure 2 dtmf distortion figure 3 test circuit
telefunken semiconductors U3750BM rev. a1: 16.07.1996 9 (20) figure 4 test circuit figure 5 test circuit s 5 (pin 38) s 6 (pin 39) pair of frequencies (hz) sweep frequency (hz) on on 1458/1166 4 on off 1458/1166 9.1 off on 547/438 4 off off 547/438 9.1
telefunken semiconductors U3750BM rev. a1: 16.07.1996 10 (20) electrical characteristics of logical part f clock = 455 khz (other specifications as under electrical characteristics) parameters test conditions / pins symbol min. typ. max. unit v ram speed-up off threshold speed-up on threshold logic operating voltage in normal mode i l = 8 ma i l = 15 to 70 ma v soff v son 2.4 1.9 2.75 2.2 2.5 3.5 2.9 2.3 v v v v i ram oscillator on leakage v ram = 3.5 v 800 300 a a inputs: c1, c2, c3, c4, c5, c6, dc/fv, flash input voltage low, v il input voltage high, v ih 0.8 v ram 0.2 v ram v v keyboard pins: c1, c2, c3, c4, c5, c6 internal pull down output current v il = 3.5 v v ih = 0 v 15 0.8 50 2.5 a a flash, dc/fv internal pull-up current ipv leakage current v il = 0 v v ih = 3.5 v 0.5 5 1 a timing and frequency reset time t r (see figure 6 and 7) clock start-up time t on time line break generating a reset: t lb debounce time, t e in mode 60/40 in mode 66/33 and dtmf mode in mode 60/40 in mode 66/33 and dtmf mode in mode 60/40 in mode 66/33 and dtmf mode 290 319 14 15.4 30 33 5 24 26.4 300 330 34 37.4 ms ms ms ms ms ms ms reset output (with 390 series) output low current output high current v ol = 2.5 v v ol = 0.5 v i ol i oh 0.25 0.25 1.2 1.2 ma ma ol output output low current output high current v ol = 0.5 v i ol i oh 2 1 20 4 a ma mf output high impedance v ohi = 1.4 v fl = l, fh = h, v oh = 3.5 v fb = l, fh = h, v oh = 0 v fb = h, fh = l, v oh = 3.5 v fb = h, fh = l, v oh = 0 v 150 200 200 150 0.5 350 550 550 350 a a a a a ck input low input leakage high input leakage v il = 0.5 v v il = 3.0 v 1 1 a a
telefunken semiconductors U3750BM rev. a1: 16.07.1996 11 (20) unit max. typ. min. symbol test conditions / pins parameters serial bus (see figure 12) pulse width clock pulse width enable signal set-up time data to clock hold time data from clock enable time time between two trans- missions t wl , t wh t el , t eh t set up t e t rrn 2 2 0 100 0 900 s s s s s s pulse dialing (ol) dialing pulse frequency dialing pulse period break time make time interdigit time transmission mute: t mol = (t m + t b ) n + t m1 n pulses dialling in mode 60/40 (pin 4 tied to reset) in mode 66/33 (pin 4 not connected) t ol t b t m t idol 830 813 [ n 100 + 30 ] [ n 98.8 + 22 ] 10 10.11 100 98.9 60 66 40 33 833 816.5 (n 100) + 32 (n 98.9) + 24.2 hz hz ms ms ms ms ms ms ms ms ms ms flash pulse flash pulse duration transmission mute pin 3 to gnd pin 4 to reset pin 3 to gnd pin 4 to nc pin 3 to gnd pin 4 to gnd pin 3 to nc pin 4 to reset pin 3 to nc pin 4 to nc pin 3 to nc pin 4 to gnd pin 3 to reset pin 4 to re- set pin 3 to reset pin 4 to nc pin 3 to reset pin 4 to gnd in mode 60/40 in mode 66/33 in mode dtmf t fl tm fl 89.5 98.5 102.5 239.5 263.5 274.0 109.5 120.5 125.0 830 813 846 92 101 105 242 266 277 112 123 128 832 815.5 848.5 ms pause time in mode 60/40 in mode 66/33 in dtmf mode t p 3116 3075 3012 3118 3077 3110 ms
telefunken semiconductors U3750BM rev. a1: 16.07.1996 12 (20) power-on reset and pin reset to avoid undefined states of the device when it is powered on, an internal reset clears the control logic. when the power supply rises above the internal reference level, the pin reset goes to high during t rt . after a line break longer than t lb, a reset is generated. a short line break (< t lb) does not affect the reset. power on reset timings (t > t lb ). 1) v ram > v son at t = 0 a) . . . . . . . . . trt = tr + t on b) . . . . . . . . . . . . . . . . . . . . . . a) b) figure 6 2) v ram < v son at t = 0 a) . . . . . . . . . trt = t (v ram to v s off ) + tr + t on b) . . . . a) b) figure 7 pin reset it is the power on reset output. in test mode, it permits to force the ic u 3750 bm in permanent dtmf dialing by applying a negative voltage (test schematic figure 3). data acquisition input data is derived from any standard matrix keyboard (15 keys) or from a remote microcontroller. keyboard the keyboard is connected to the ic by six pins, (see figure 8). its matrix is triangular. figure 8 keyboard inputs to the u 3750 bm internal pull down resistors (typical value: 120 k ) are connected to the inputs ci. a push button is made by a short-circuit of two pins among the six. entries are scanned every 12 ms or 13.2 ms and go to the logical state 1 during this scanning. the scanning is inhibited as soon as a calibrated line- break is produced at the ol output. the scanning-cycle has eight phases: six of them are reserved for the scanning of the six pins, the two others are kept for the reset of the logic keyboard (t0) and the acquisition (t7). a push button is valid, if it is unique and if it's pressed long enough (see table of pressed and released push buttons). every acquisition time, t7, the input code is decoded into 5 bits (with or without a pressed push button). the micro- processor can read it as soon as the logic keyboard has set a flag, tested about every 800 ms and which indicates that a pushbutton has been correctly detected.
telefunken semiconductors U3750BM rev. a1: 16.07.1996 13 (20) table 2 the scanning principle keyboard clock 2 ms 2.2 ms ti except t0, t1, t7 2 ms 2.2 ms t1 1.956 ms 2.156 ms t0 or t7 22 ms 22 ms scanning cycle 12 ms 13.2 ms t0: reset of the logic keyboard t7: acquisition of the code present at the keyboard scanning push button figure 9 the scanning principle
telefunken semiconductors U3750BM rev. a1: 16.07.1996 14 (20) timing of a push button the information from a pressed push button or released push button is taken into account if it is still present during at least two sampling times, t7. table 3 timing of a push button clock keyboard 2 ms, 2.2 ms min. typ. max. unit minimum time push button on 14 15.4 24 26.4 34 37.4 ms ms minimum time push button off 24 26.4 24 26.4 34 37.4 ms ms the entries are debounced on both the leading and trailing edges for 34 ms or 37.4 ms according to the value of the keyboard clock, and so the time remains less than 40 ms. at this time the information can be processed. if the informa- tion is still present after more than 40 ms, it is only taken one time. serial bus the remote microcontroller is connected to the ic by 4 pins: c2, c3, c4, c5 (see figure 10). figure 10 connection of the microcontroller to the U3750BM c2 transmits the data, c3 the clock, c4 the enable signal, and c5 indicates the state of the dialer: c5 = 0, dialer is busy c5 = 1, dialer is free data is serially shifted in a 5-bit register during the positive going transition of the clock pulse. the positive going transition of the enable signal validates the transmission.
telefunken semiconductors U3750BM rev. a1: 16.07.1996 15 (20) figure 11 timing of the serial bus code entries table 0 0 0 0 0 * 0 0 0 0 1 1 0 0 0 1 0 2 0 0 0 1 1 3 0 0 1 0 0 4 0 0 1 0 1 5 0 0 1 1 0 6 0 0 1 1 1 7 0 1 0 0 0 8 0 1 0 0 1 9 0 1 0 1 0 0 0 1 0 1 1 a 0 1 1 0 0 b 0 1 1 0 1 c 0 1 1 1 0 d 0 1 1 1 1 # 1 0 0 0 0 16 1 0 0 0 1 r flash 1 0 0 1 0 redial 1 0 1 0 0 confidence tone 1 0 1 0 1 micro inhibition 1 0 1 1 0 pause 1 0 1 1 1 23
telefunken semiconductors U3750BM rev. a1: 16.07.1996 16 (20) dialer the ic includes a dialing circuit for either pulse dialing or dual tone multifrequency dialing. the dialer transmits the codes decoded by the logic keyboard on the outputs ol and mf. mode selection the choice of dialing is made by the tri-state-level on the dc/fv pin fv dc = z pulse dialing in 66/33 ms fv dc tied to pin reset pulse dialing in 60/40 ms fv dc = 0 dtmf dialing calibrated when the circuit is in pulse mode, it is possible to change over to dtmf dialing with the a * o key. the code a * o is sent in line. the circuit returns in pulse mode after a reset condition or after a flash pulse (see figure 14). dialing codes the dialing codes are the numeric keys 0 to 9, and the non numeric keys a, b, c, d, *, #. all are stored in ram. the codes a, b, c and d can be only transmitted by the serial bus. in pulse dialing, the code #, b, c and d have no effect on the dialing. the code a is filtered and corresponds to eleven pulses. dialing as soon as the code is detected by the logic keyboard and written in ram, it can only be loaded in the dialer if the dialer is not occupied and a pause is not generated. pulse dialing the output which provides control signals for proper timing in pulse dialing is pin, ol. the dialling starts with a make time (see figure 12). dual tone multifrequency dialing the output pin, mf, provides the multifrequency signal to transmit in line. this signal results from the sum of two frequency pulses modulated and requires a filter to com- pose a dual sine wave. the frequencies are chosen in a low group and a high group. table 3 shows the frequency tolerance of the output tones for dtmf signalling. in manual dialing or in redial, output tone is timed with a fixed duration. table 4 frequency tolerance of the output tones for dtmf signaling standard frequency tone output frequency frequency deviation hz hz % hz low group 697 770 852 941 697.8 768.6 848.9 940.1 +0.12 0.18 0.37 0.10 +0.85 1.42 3.12 0.92 high group 1209 1336 1477 1633 1210.1 1338.2 1477.3 1636.7 +0.09 +0.17 +0.02 +0.22 +1.11 +2.23 +0.27 +3.69 tone output frequency when using a 455 khz ceramic.
telefunken semiconductors U3750BM rev. a1: 16.07.1996 17 (20) figure 12 timing diagram for pulse dialing figure 13 timing diagram for dtmf dialing figure 14 timing diagram for mixed mode dialing
telefunken semiconductors U3750BM rev. a1: 16.07.1996 18 (20) flash control detecting a aro code produces either a short timed line break (< 200 ms ) or long timed line break (>200 ms) at the ol output. for the duration of the flash, it is not possible to take information from the keyboard. flash signifies that the circuit executes a particular work as a dialing, a redial, or a pause function, and the code aro is lost and not used. the flash pulse resets the read address counter and does not erase the data storage, so later redial is possible. the flash duration is programmed by the flash pin (pin 3) and depends on the selection of the tri-state-level pin (pin 4). mutes (transmission mute and dialing mute) become active high from the beginning of the line break. timings explains this. according to these timings and what has previously been said, a second pulse flash could only follow the first one 810 ms or 850 ms later. consequently the aro entry remains inhibited during a time less than 1 second. pause function a pause separates the dial sequence. it is used for waiting for a dial tone. a pause code takes one position in the ram like a digit. however, if the circuit executes a pause and if another pause code is entered, the storage of the second one does not occur. furthermore, the pause running is aborted. duration of the pause is given in electrical characteristics for the following configuration: digit, pause, digit, and consequently takes into account the interdigit. particular functions after the reset, the particular functions are cleared. the state of the circuit is no confidence tone, no microphone inhibition. confidence tone output when the data entries are derived from the serial bus, a pulse frequency modulation corresponding to a 440 hz sine wave can be generated on the output mf by transmit- ting the confidence tone code which is 20 (in decimal). the function confidence tone is a flip-flop function. microphone inhibition like the confidence tone, it is a flip flop function acti- vated through the serial bus by the code 21 (in decimal). ram organization the ram is 32 words of 5 bits and is organized in two parts: one for the data storage and the other for the working ram. safeguard the safeguard is guaranteed by an external capacitor. if v ram decreases under the data retention supply voltage, the redial function is forbidden. after the reset of the circuit, a test is executed on v ram in order to ensure the redial validity. data storage storage, overflow and erasing are realized through three address counters. the written address counter (p1) points out the location where the code will be stored. at each storage, p1 is incremented by one. as each code is recalled from the ram for line dialing, the read address counter (m1) is incremented by one to select the ram location of the next code to be recalled. consequently, the difference between the contents of p1 and of m1 represents the number of codes that have been written into the ram but not yet converted into line dialing. the third counter (p2) gives the real capacity of the redial register. redial features capacity if more than 23 codes are entered into the ram memory, overflow results and the excess codes replace the data in the lower numbered ram locations. in this event, auto- matic redial is no longer possible. storage storage pertains to the dialing codes 0 to 9, *, #, pause, a, b, c and d. it is independent of the dialing mode (pulse dialing or dtmf dialing).the storage generally contains the last digits transmitted. use of redial the use of redial is always possible except if the content of the ram is empty (p2 = 0). this happens when the ram supply is not high enough , when an overflow occurred, or when previously an erroneous use of the redial occurred (start of manual dialing not equal to the content of the ram).
telefunken semiconductors U3750BM rev. a1: 16.07.1996 19 (20) if the redial is ordered after a manual dialing the redial is executed according to the digits already transmitted in line. the redial is effective if the comparison digit-by-digit of all digits is correct. it is not produced if the comparison is incorrect or if the number of digits exceeded the last capacity of the redial. during redial, entry codes are accepted. procedure with * storage does not pertain to the a*o code and the codes entered after it when the manual dialing starts with a numeric code or a, b, c, d, #, or pause codes. if the dialing starts with the a*o code, all codes can be stored. note: the a#o code is treated for storage like a number. procedure with flash the flash pulse does not reset the content of the ram. example: 1 2 3 r redial 1 2 3 r 1 2 3 redial 1 2 3 erasing redial the erasing is possible through the serial bus with the decimal codes 16 and 23. there is not much difference between these two codes: code 16 always erases the redial, code 23 inhibits a later redial if it is transmitted after or before dialing codes. the following examples illustrates this. transmitted codes on line 1 2 3 redial 16 1 2 3 nothing 1 2 3 redial 23 1 2 3 1 2 3 redial 16 4 1 2 3 4 4 1 2 3 redial 23 4 1 2 3 4 1 2 3 redial r 16 1 2 3 r 1 2 3 redial r 23 1 2 3 r 1 2 3 special case when the overflow flag is set and when the written address counter becomes equal to the read address counter, the codes are not stored. dimensions in mm package: plcc 44
telefunken semiconductors U3750BM rev. a1: 16.07.1996 20 (20) ozone depleting substances policy statement it is the policy of temic telefunken microelectronic gmbh to 1. meet all present and future national and international statutory requirements. 2. regularly and continuously improve the performance of our products, processes, distribution and operating systems with respect to their impact on the health and safety of our employees and the public, as well as their impact on the environment. it is particular concern to control or eliminate releases of those substances into the atmosphere which are known as ozone depleting substances ( odss). the montreal protocol ( 1987) and its london amendments ( 1990) intend to severely restrict the use of odss and forbid their use within the next ten years. various national and international initiatives are pressing for an earlier ban on these substances. temic telefunken microelectronic gmbh semiconductor division has been able to use its policy of continuous improvements to eliminate the use of odss listed in the following documents. 1. annex a, b and list of transitional substances of the montreal protocol and the london amendments respectively 2 . class i and ii ozone depleting substances in the clean air act amendments of 1990 by the environmental protection agency ( epa ) in the usa 3. council decision 88/540/eec and 91/690/eec annex a, b and c ( transitional substances ) respectively. temic can certify that our semiconductors are not manufactured with ozone depleting substances and do not contain such substances. we reserve the right to make changes to improve technical design and may do so without further notice . parameters can vary in different applications. all operating parameters must be validated for each customer application by the customer. should the buyer use temic products for any unintended or unauthorized application, the buyer shall indemnify temic against all claims, costs, damages, and expenses, arising out of, directly or indirectly, any claim of personal damage, injury or death associated with such unintended or unauthorized use. temic telefunken microelectronic gmbh, p.o.b. 3535, d-74025 heilbronn, germany telephone: 49 ( 0 ) 7131 67 2831, fax number: 49 ( 0 ) 7131 67 2423

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