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amax stereo ic chipset dw suffix plastic package case 751d (so20l) 20 1 order this document from analog marketing dw suffix plastic package case 751f (so28l) 28 1 20 1 28 1 mc13027 MC13122 p suffix plastic package case 710 p suffix plastic package case 738 1 motorola analog ic device data

the mc13027 and MC13122 have been specifically designed for am radio which can meet the eia/nab amax requirements. they are essentially the same as the mc13022a and mc13025 with the addition of noise blanking circuitry. the noise blanker consists of a wide band amplifier with an rf switch for blanking ahead the if amplifier and a stereo audio blanker with adjustable delay and blanking times. ? operating voltage range of 6.0 v to 10 v ? rf blanker with builtin wide band agc amplifier ? audio noise blanker with audio track and hold ? mixer third order intercept of 8.0 dbm (115 db m v) ? wide band agc detector for rf amplifier ? local oscillator vco divideby4 for better phase noise ? buffered local oscillator output at the fundamental frequency ? fast stereo decoder lock ? soft stereo blend ? signal quality detector to control variable qnotch filters for adaptive audio bandwidth and whistle reduction ? signal quality detector for am stereo ? very low distortion envelope and synchronous detectors ? variable bandwidth if ordering information device operating temperature range package mc13027dw t40 85 c so20l mc13027p t a = 40 to +85 c plastic dip MC13122dw t a = 40 to + 85 c so28l MC13122p plastic dip fast agc control audio blanking functional block diagram oscillator buffer voltage controlled oscillator wide band agc am detector automatic gain controlled rf amplifier pulse detector 4 mixer if amplifier if amplifier agc shunt switch pulse length timer pulse delay timer signal quality detector pilot detector decoder track & hold post detector filter 450 khz if signal level 450 khz blend cos q fast lock control stereo indicator lamp stopsense rf agc meter drive right audio left audio yes/no i rf blanking agc output to synthesizer osc tank agc input rf input rf input l r q fast/ slow mc13027 MC13122 this device contains 428 active transistors. this device contains 670 active transistors. pulse length timer this document contains information on a product under development. motorola reserves the right to change or discontinue this product without notice. ? motorola, inc. 1996 issue 1
mc13027 MC13122 2 motorola analog ic device data mc13027 maximum ratings rating symbol value unit power supply input voltage v cc 12 vdc ambient operating temperature t a 40 to +85 c storage temperature range t stg 60 to +150 c operating junction temperature t j 150 c note: esd data available upon request. mc13027 electrical characteristics (t a = 25 c, 8.0 v cc test circuit as shown in figure 1.) characteristic min typ max unit supply voltage range (pin 8) 6.0 to 10 v wideband (wb) agc threshold 1.0 mvrms if output dc current 1.0 madc mixer dc current output 0.83 madc local oscillator output 600 mvpp wideband agc pulldown current (pin 20) 1.0 madc power supply current 16 madc mixer 3rd order intercept point (pin 6) 8.0 dbm mixer conversion gain 2.9 ms if amplifier input impedance (pin 14) 2.2 k w if amplifier transconductance 2.8 ms if amplifier load resistance (pin 16) 5.7 k w if amplifier collector current (pin 16) 990 m a
mc13027 MC13122 3 motorola analog ic device data figure 1. mc13027 test circuit 3 4 rf in 1 2 3 4 5 6 7 8 v cc gnd mixer in mixer 4.0 v tuning v vclo vclo 4.0 v c87 0.1 r2 82 r1 100 k rl2 51 rm2 16.7 r299 51 rm1 16.7 pulse in rf in pulse on rf mixer in blanker in wb agc rl1 51 r10 56 k c5 22 m f c14 47 m f r200 560 k v cc v cc on r4 47 r11 47 q1 mmbfj309l rm5 16.7 cm1 0.01 c11 0.1 c293 10 m f c6 0.1 r201 120 c37 0.01 100 lo out tuning voltage 4.0 v reg c9 47 m f c16 10 m f c26 1.0 m f c10 0.01 r20 47 k c90 0.1 r3b 10 k r18 2.35 k r1b 10 k r16 3.3 k rt1 39 k q2 (note 1) q3 (note 1) r19 500 k r17 500 k r15 500 k c103 0.1 r12 1.8 k q1b (note 1) r5b 390 k r21 510 c16 120 l2 1.0 mh murata sfg450e 20 19 18 17 16 15 14 13 12 11 1 2 3 4 5 6 7 8 9 10 wb agc out audio blank time audio blank pulse audio blank delay time if out rf blank time if in gnd2 rf blank mixer out wb agc in blanker agc feedback 4.0 v reg rf gnd mixer in blanker rf in 4.0 filter v cc vco lo out wb agc out audio blank if out rf blank r2b 10 k 1 2 5 v cc agc feedback mc13027 rf module q4 mmbt3904l v cc v cc + + + + + + note: 1. general purpose npn transistor 2n3904 or equivalent.
mc13027 MC13122 4 motorola analog ic device data MC13122 maximum ratings rating symbol value unit power supply input voltage v cc 12 vdc stereo (pilot) indicator lamp current (pin 21) 30 madc operating ambient temperature t a 40 to +85 c storage temperature range t stg 65 to +150 c operating junction temperature t j(max) 150 c power dissipation derated above 25 c p d 1.25 w p d 10 mw/c note: esd data available upon request. MC13122 electrical characteristics (v cc = 8.0 v, t a = 25 c, test circuit of figure 2.) characteristic min typ max unit power supply operating range 6.0 8.0 10 v supply current drain (pin 25) 10 20 25 ma minimum input signal level, unmodulated, for agc start 5.0 mv audio output level, 50% modulation, l only or r only 290 400 530 mvrms audio output level, 50% mono 140 200 265 mvrms output thd, 50% modulation (monaural stereo) 0.3 0.8 % p, ( ) 0.5 1.6 channel separation, l only or r only, 50% modulation 22 35 db if input voltage range 1.01000 mv if input resistance range 10 to 50 k w if amplifier transconductance 9.6 ms if detector circuit impedance 8.3 k w input agc threshold 5.0 mv stopsense output range 2.2 to 4.0 v audio output impedance at 1.0 khz (pins 7 and 14) 300 w stereo indicator lamp leakage 1.0 m a stereo indicator saturation voltage @ 3.0 ma 200 mvdc oscillator capture range 3.0 khz
mc13027 MC13122 5 motorola analog ic device data figure 2. MC13122 test circuit MC13122 ic2 u2 thb122 1 ch2 out 2 3 4 5 6 ch2 cont ch2 in ch1 in ch1 cont ch1 out 23 i det 24 25 26 27 28 lr det q det v cc loop filt blend 17 gnd 18 19 20 21 22 pilot ind osc out osc in pilot det i pilot i 16 pilot q 15 audio blank e det det in 3.0 v reg agc if in ss l out l filt in l filt ctr l mat out r mat out r filt ctr r filt in r out 6 5 4 3 2 1 12 11 10 9 8 7 13 14 r10 13 k c3 47 m f c4 10 m f 450 khz if in ss out left audio out right audio out c6 1.0 m f c1 1000 .01 100 k r6 10 k r5 c28 1000 c27 1000 1000 1000 33 k r11 c16 0.47 m f c17 10 m f c31 1.0 m f 1000 c30 3.9 k r12 c18 22 m f 1.0 k r20 x1 3.6 mhz af blank blend disable 8.0 v envelope det out i detector out q detector out 2.2 k r26 c23 22 m f c24 47 m f c22 220 m f stereo d1 ca mps6515 q3 c b e 51 c29 l1 1.0 mh c2 120
mc13027 MC13122 6 motorola analog ic device data amax stereo chipset what is amax? in 1993, a joint proposal by the eia (electronic industries association) and the nab (national association of broadcasters) was issued. it included a unified standard for preemphasis and distortion for broadcasters as well as a set of criteria for the certification of receivers. the purpose of this proposal was to restore quality and uniformity to the am band and to make it possible for the consumer to receive high quality signals using the am band. the fcc has been supportive of this initiative and has required all new broadcast licensees to meet amax standards. the nab and eia have continued to encourage receiver manufacturers by offering the amax certification logo to be displayed on all qualifying radios. this logo is shown below. or the receiver criteria an amax receiver must have wide bandwidth: 7.5khz for home and auto, 6.5 khz for portables. it must have some form of bandwidth control, either manual or automatic, including at least two bandwidth provisions, such as anarrowo and awideo. it must meet nrsc receiver standards for distortion and deemphasis. it must have provisions for an external antenna. it must be capable of tuning the expanded am band (up to 1700 khz). and finally, home and auto receivers must have effective noise blanking. all of these requirements, except the noise blanking, have been met by motorola's previous am radio products, such as mc13025 front end and the mc13022a cquam stereo decoder. it is the noise blanker requirement which is met by the two devices on this data sheet, the mc13027 and MC13122. noise blanking, especially in am auto radios, has become extremely important. the combination of higher energy ignitions, using multiple spark coils, along with increased use of plastic in the auto body, have increased the noise energy at the radio. also, the consumer has learned to expect higher quality audio due to advances in many other media. for the am band to sustain interest to the consumer, a truly effective noise blanker is required. the block diagram below shows the motorola amax stereo chipset. it offers a twopronged approach to noise blanking which is believed to be the most effective yet offered in the consumer market. the initial blanking takes place in the output of the mixer, using a shunt circuit triggered by a carefully defined wideband receiver. for most noises, some residual audible disturbance is almost always still present after this process. the disturbance becomes stretched and delayed as it passes through the rest of the selectivity in the receiver. the stretching and delay are predictable, so the mc13027 can provide a noise blanking pulse with the correct delay and stretch to the output stages of the MC13122 decoder. the MC13122 has a track and hold circuit which receives the blanking signal from the front end and uses it to gently hold the audio wherever it is as the pulse arrives, and hold that value until the noise has passed. the combined effect is dramatic. a wide range of types of noise is successfully suppressed and the resulting audio seems almost clean until the noise is so intense that the blanking approaches fulltime. the amount of extra circuitry to accomplish noise blanking is relatively small. the external components for this added capability are shown in figure 3. in the mc13027 front end, the noise receiver/detector requires two capacitors. the presettings for blanking timing and blanking delay require three external fixed resistors. finally the decoder requires two track and hold capacitors to store the aaudioo voltage during the track and hold function. figure 3. amax stereo receiver with noise blanker mc13027 MC13122 audio blank 450 khz filter rf attenuate left right rf in pin diode reset agc rf amplifier mixer if amplifier agc'd if amplifier am stereo decoder track and hold variable notch filter wideband agc 4.0 v regulator divide by 4 vco rf attenuator switch rf blank timer agc'd rf amplifier am detector audio reject filter pulse detector delay timer audio blank timer audio blank switch
mc13027 MC13122 7 motorola analog ic device data figure 4. mc13027 internal block diagram 20 19 18 17 16 15 14 13 12 11 12345678910 wb agc amp mixer if amp nb amp v cc 4 rf time mv af del mv af time mv x1 reg x1 wb agc in blanker agc feedback 4.0 v reg rf gnd mixer in blanker rf in 4.0 filter v cc vco lo out wb agc out audio blank time audio blank pulse audio blank delay time if out rf blank time if in gnd2 rf blank mixer out mc13027 functional description the mc13027 contains the mixer, wide band agc system, local oscillator, if preamplifier and noise blanker for an am radio receiver. it is designed to be used with the MC13122 to produce a complete am stereo receiver. the vco runs at 4 (f in +f if ) and is divided internally by 4 for the mixer input and local oscillator buffered output. dividing the vco reduces the phase noise for am stereo applications. the noise blanker input is connected in parallel with the mixer input at pin 6. the noise blanker circuitry contains a high gain amplifier with its own agc so it remains linear throughout the mixer's linear range. it can detect noise pulses as low as 120 m v and generates three pulses when the noise threshold is exceeded. the width and timing of the blanking pulses is set by the resistors connected to pins 15, 17 and 19. the resistor on pin 15 sets the length of the rf blanking pulse and determines the time the transistor on pin 12 is aono. the audio blanking pulse delay is set by the resistor on pin 17 and the width by the resistor on pin 19. this is necessary because the if filtering delays and stretches the noise as it arrives at the detector. the transistor on pin 18 goes aono to cause noise blanking in the track and hold circuit in the MC13122 (pin 15). wideband agc is used in auto receivers to prevent overload it drives the base of a cascode transistor rf amplifier and also a pin diode at the antenna (see figures 6 and 7). a low gain if amplifier between pins 14 and 16 is used as a buffer amplifier between the mixer output filter and if filter. the input resistance of the if amplifier is designed to match a ceramic if filter. the gain of the if amplifier is determined by the impedance of the load on pin 16.
mc13027 MC13122 8 motorola analog ic device data figure 5. MC13122 internal block diagram 28 27 26 25 24 23 22 1234567 21 20 19 18 891011 17 16 15 12 13 14 i lr q v cc vga 0.9 vga 0.9 lr level fast agc 1.0 v 3.0 v agc matrix cquam comparator blend disable 450 <90 450 <0 signal quality detector 32 137/144 4 count control clamp 25.6 hz 24.4 hz fast lock vco loop driver pilot level det 8 pilot i det pilot q det cos q 330 loop filt blend gnd pilot ind osc out osc in pilot det i pilot i pilot q audio blank lr l+r if amp v cc q det lr det i det if in ss l out l filt in l filt ctr l mat out r mat out r filt ctr r filt in r out agc 3.0 v reg det in e det MC13122 functional description the MC13122 is designed to accept a 450 khz cquam input signal from approximately 1.0 mv to 1.0 v and produce l and r audio output signals. it has additional features: stop signal, variable bandwidth if and audio response, stereo indicator driver and track and hold noise blanking. the if amplifier on pin 5 has its own agc system. it operates by varying the input resistance on pin 5. with weak signals below approximate 5.0 mv, the input resistance is very high and the amplifier is at maximum gain. for this agc to be effective, it is necessary to feed the if input signal from a relatively high impedance. the input resistance variation also reduces the q of the coil (t1 in the application) so the receiver bandwidth is narrow for weak signals and wide for strong signals. the value of the input resistor (r5) is selected for the desired loading of the if coil. the impedance of the if coil on pin 2 determines the if gain. pin 2 is also the input to the cquam decoder. the if signal drives the envelope (e), inphase (i), quadrature (q) and (lr) detectors. the e detector is a quasisynchronous true envelope detector. the others are true synchronous detectors. the e detector output provides the l+r portion of the cquam signal directly to the matrix. the agc signal of the if amplifier drives the signal strength output at pin 6. an external resistor on pin 6 (sets the gain of the agc). the pin 6 voltage is used to control the q of the audio notch filter, causing the audio bandwidth and depth of the 10 khz notch to change with signal strength. it is also used as one of the inputs to the signal quality detector which generates the stopsense and blend signal on pins 6 and 23 respectively and tells the signal quality detector that the rf input is below the agc threshold. vco the 3.6 mhz ceramic resonator on pins 19 and 20 is part of a phase locked loop which locks to the 450 khz if signal. the 3.6 mhz is divided by 8 to produce inphase and quadrature signals for the i, q and lr detectors. it is also divided by 32, and 137/144 to provide signals for the pilot i and q detectors. the pilot detector is a unique circuit which does not need filtering to detect the 25 hz pilot. blend circuit the purpose of the blend circuit is to provide an am stereo radio with the capability of very fast lock times, protection against stereo falsing when there is no pilot present and control of the lr signal so as to provide as much stereo information as possible, while still sounding good in the presence of noise or interference. the circuit also provides an optional stopsense usable by a radio with seek and/or scan. the stopsense signal provides a astopo signal only when the radio is locked on station, signal strength is above minimum level, and the level of interference is less than a predetermined amount. the last feature prevents stopping on frequencies where there is is a multiplicity of strong cochannel stations. it is common for am radios without this capability to stop on many frequencies with unlistenable stations, especially at night. the blend circuit controls the pll fast lock, pilot detector, if amplifier agc rate, decoder lr gain, cos q compensation and stopsense as a function of the voltage on a signal external blend capacitor. timing is determined by the rate of change of voltage on the blend cap. timing is changed by varying charge and discharge current and pulled down by a current source, switch, and optionally an external switch. the current sources and switches are controlled by various measures of signal quality, signal strength, and presence or absence of pilot tone.
mc13027 MC13122 9 motorola analog ic device data detectors in am stereo operation, the q detector delivers pilot signal via an external lowpass filter to the pilot detector input (pin 18). the e and i detectors drive the cquam comparator. the lr signal and the output of the envelope detector are combined in the matrix to produce the l and r signals. the cquam system modifies the inphase and quadrature components of the transmitted signal by the cosine of the phase angle of the resultant carrier, for proper stereo decoding. an uncompensated lr would be distorted, primarily by second harmonics. where there is noise or interference in the lr, it has been subjectively determined that reducing the cos q compensation at the expense of increased distortion sounds better than full decoding. the blend line operates over a small voltage range to eliminate cosine compensation. signal quality detector blend voltage control the signal quality detector output is dependent on signal strength, overmodulation, and whether or not the blend pin has been pulled low prior to searching. overmodulation usually occurs when a radio is tuned one channel away from a desired strong signal, so this prevents stopping one channel away from a strong signal. in a radio tuned to a strong, interference free cquam station, the blend voltage will be approximately 3.6 v. in the presence of noise or interference, when the modulation envelope is at a minimum, it is possible for the i detector to produce a negative, or below zero carrier signal. the signal quality detector produces an output each time the negative i exceeds 4%. the output of the detector sets a latch. the output of the latch turns on current source which pulls down the voltage of the blend cap at a predetermined rate. the latch is then reset by a low frequency signal from the pilot detector logic. this produces about a 200 mv change each time 4% negative i is detected. tables 1 and 2 describe the blend behavior under various conditions. when the blend voltage reaches 2.2 v a blend control circuit starts to reduce the amplitude of the lr signal fed to the decoder matrix. by 1.5 v the lr has been reduced by about 40 db. at lower voltages it is entirely off and the decoder output is monaural. this reduction of lr signal, or blend as it is commonly called when done in fm stereo radios, reduces undesirable interference effects as a function of the amount of interference present. stopsense stopsense is enabled when the blend voltage is externally pulled below 0.45 v. an input from the agc indicating minimum signal, or detection of 10% negative i will cause the stopsense pin to be pulled low. with signals greater than the agc corner and less than 10% interference the stopsense will be a minimum of 1.0 v below the 3.0 v line. very rapid scanning is possible because the radio can scan to the next frequency as soon as the stopsense goes low. the maximum wait time, set by the radio, is only reached on good stations. the decoder will not lock on an adjacent channel because it is out of the lock range of the pll. the beat note produced in the i detector by the out of lock condition will trigger the 10% negative i detector. sequence for seek scan ? change station pulldown blend ? wait approximately 50 ms for synthesizer and decoder pll to lock ? observe pin 6 voltage ? if it is above 2.0 v and stays above 2.0 v for approximately 800 ms, stay on the station ? no if count now needed ? no agc level detector needed table 1. normal sequence when changing stations external pulldown of blend capacitor to under 0.47 v increased current supplied to loop driver for fast lock fast agc activated extra current pullup activated on blend capacitor pilot detector disabled loop locks stopsense activated blend released blend capacitor pulled up to 0.7 v stops fast lock current removed fast agc turned off pilot detector enabled pilot detected stereo indicator pin pulled low blend voltage pulled positive rapidly blend voltage reaches 1.4 v audio starts into stereo 10% negative i detector enabled blend voltage reaches 2.2 v stereo separator reaches 20 to 25 db rapid current pullup turned off 4% negative i detector enabled blend voltage reaches 3.0 v cos q enabled full cquam decoding blend voltage continues to rise to 3.6 v and stops table 2. operation in adverse conditions 4% negative i detected blend pulls down approximately 200 mv for each event acts like oneshot stops at 2.2 v cos q has been defeated, almost full stereo remains 10% negative i detected blend pulls down 200 mv for each event stops at 1.4 v stereo has blended to mono resets fast pullup if blend has not been above 2.2 v 50% negative i detected (out of lock) blend pulls down fast during event stops at 0.47 v resets fast pullup pilot indicator turned off minimum signal level detected resets fast pullup pulls down to 0.7 v
mc13027 MC13122 10 motorola analog ic device data mc13027 pin function description pin name internal equivalent circuit description 1 wb agc in v cc 1 3.3 v wb agc in r2 15 k 20 k wideband agc input the input impedance to the wb agc detector is 15 k and is internally biased so it must be coupled through a capacitor. the threshold can be increased by adding a resistor in series with the input. the wb agc begins at about 1.0 mv. in car radios, this input should be connected to the collector of the rf amplifier cascode stage through a resistor and capacitor. a 68 pf to ground will prevent undesired high frequency signals from activating the wb agc and make the sensitivity more uniform across the band. 2 blanker agc 2 nb agc d1 d2 blanker agc the capacitor to ground is the bypass for the noise blanker agc circuit. the noise blanker can be disabled by grounding this pin. 10 m f is used in the application, but it can be changed to match the time constant of the main if agc in the MC13122, pin 4. 3 feedback 3 nb feedback 11 k blanker feedback this pin is the dc feedback to the input stage of the wide band amplifier. 4 4.0 v reg 4 7 4.0 v reg 4.0 v filter buffer 4.0 v regulator the 4.0 v regulator supplies low impedance bias to many of the circuits in the ic. it should be bypassed to a ground near pin 5. 7 4.0 v filt v cc 4.7 k reg 4.0 v filter the external capacitor works with internal 4.7 k to filter noise from the bandgap regulator. 5 gnd 5 rf gnd rf ground this pin is the ground for the rf section, blanker rf, filters and all radio circuits except the if. in the pcb layout, the ground pin should be used as the internal return ground in the rf circuits. 6 blk rf /mix in 6 11 mixer out mixer/ blanker in lo + v cc lo 50 w 50 w 50 w 50 w v cc 4.0 v mixer input/blanker rf input the blanker rf input must be biased from the 4.0 v on pin 4. the mixer input is to two bases of the upper mixer transistors. a low impedance dc path to the 4.0 v on pin 4 is required. normally, this would be a coil secondary connected between pins 6 and 4. 11 mixer out 750 lo mixer output a single ended output of a double balanced mixer. a load resistor to supply is chosen to match the ceramic filter, typically 1.5 k to 1.8 k. output current is 830 m a.
mc13027 MC13122 11 motorola analog ic device data mc13027 pin function description (continued) description pin internal equivalent circuit name 8 v cc 8 v cc v cc supply voltage the normal operating voltage range is 6.0 to 10 v. 9 vclo 9 v cc vclo 4.0 v 1.5 k voltage control local oscillator the oscillator is a cross coupled negative resistance type and this pin must be connected through a low dc resistance to pin 4, the 4.0 v regulator. normally, this would be the secondary of the oscillator coil. the impedance of the secondary winding should be around 2.8 k w to guarantee that the oscillator will run. it operates at 4 times the lo frequency: f osc = 4(f in +f if ). 10 lo out 10 v cc 390 lo out local oscillator output this is an emitter follower for lo output to drive a synthesizer. it is a square wave output, the internal series resistance and allows a small bypass to reduce high frequency harmonics. 12 rf blank 12 100 k rf blk rf blanker an unbiased npn acts as a shunt impedance when turned on. the 100 k resistor provides a dc path for the capacitor. 13 gnd2 13 gnd if ground pin 13 is the ground for the if section and the timing and switching circuits in the blanker. in the application circuit this should be common to the MC13122 ground. 14 if in 16 v cc 4.0 v 220 w if out 2.2 k if input a degenerated differential amplifier internally biased to 4.0 v. the if input impedance is approximately 1.8 k to match a ceramic filter. the if amplifier is used as a buffer between the ceramic filter and the detector coil and has a fixed gain determined by the impedance of the output coil. 16 if out 14 3.4 k 3.4 k if in if output an open collector provides highimpedance drive to the MC13122; the if gain is set by the ac impedance on this pin. 15 rf time 15 4.0 v 10 k rf blk time rf blank time a resistor to ground sets the rf blanking time. the time is set to the minimum required to attenuate the pulse received. this is normally longest at the low end of the band. the value is best approved by ear. a fixed value can be chosen for production. (50 m s is typical.)
mc13027 MC13122 12 motorola analog ic device data mc13027 pin function description (continued) description pin internal equivalent circuit name 17 delay time 17 4.0 k 10 k audio delay time audio blank delay time a resistor to ground sets the delay time from the beginning of the rf blanking pulse to the beginning of the audio blanking pulse. this normally is about 50 m s for a wide amax filter. the ear is the most sensitive measure of the correct delay; start low, say 20 m s, and vary delay until noise is heard, and then reduce somewhat. 18 audio blank cntl 18 v cc audio blank 4.7 k audio blank pulse when the blanker is operating, a positive pulse from this pin is fed to pin 15 of the MC13122 to blank the audio signal. 19 audio time 19 v cc 10 k audio blk time audio blank time a resistor to ground sets the width of the blanking pulse on pin 18. this is usually selected by applying a pulse to the antenna of the receiver and adjusting a variable resistor. the blanking signal should be just long enough to suppress the audio pulse. again the ear is the most sensitive tool. start long, approximately 250 m s and reduce until noise is audible then increase. 20 wb agc out 20 v cc 440 w 330 w wb agc out wideband agc output a pushpull current output. the resistor to voltage source (normally v cc ) determines the gain. used to bias a cascode transistor in series with the input fet and can also be used to drive a pnp transistor which drives a pin diode attenuator (refer to application circuit figure 6.)
mc13027 MC13122 13 motorola analog ic device data MC13122 pin function description pin name internal equivalent circuit description 1 e detector 1 v cc envelope det 6.2 k envelope detector this is the output of the envelope detector and is used for one input to the comparator that generates cos q signal and the l+r input to the matrix. it is a quasisynchronous full wave detector with very low distortion (<1% at 100% modulation). the output impedance is 6.2 k, and it is bypassed to v cc with 1.0 nf to eliminate 900 khz components. the bypass capacitor must be the same as the one on pin 27 and 28 for lowest stereo distortion and best separation. 2 detector in 2 det in v cc 120 if out/decoder input the if coil is connected from pin 2 to pin 3, the 3.0 v regulator. the if amplifier output is a current source. the gain is determined by the impedance between pins 2 and 3. bandwidth and gain is set by the resistance across the coil. 3 3.0 v reg 3 3.0 v reg 3.0 v 3.0 v regulator this bandgap regulator supplies bias to many of the circuits in the ic. 4 agc byp 4 if agc 2.3 v if agc bypass the agc has a fast and slow time constant. the fast agc is 18x the slow one and is active when the 450 khz loop is not locked. this allows for fast scanning in car radios. this capacitor should be selected for distortion for low frequencies at 80% modulation. 5 if in 5 if in 10 k agc current if input the if agc varies the current through attenuator diodes. the diodes vary the input impedance shunting the if signal. the varying impedance also varies the q and therefore the bandwidth. the if agc is accomplished by turning on the diodes and lowering the if input impedance.
mc13027 MC13122 14 motorola analog ic device data MC13122 pin function description (continued) description pin internal equivalent circuit name 6 ss 6 stopsense 1.0 k 20 k v cc 3.0 v signal strength stopsense pulldown signal strength/stopsense the signal strength is a pushpull circuit. the voltage is 2.2 v at minimum signal and 3.5 to 5.0 v at strong signal. this dc voltage is also used to control the audio output notch filters. if the blend pin is low the stopsense is activated and this pin can go low. this can be used to control the seekscan in the radio. 7 14 left out right out v cc 7 l out filtered left and filtered right output this can drive a deemphasis filter to bring audio contour to amax specifications. since the output is an emitter follower, the output impedance is low, and a series r should be used with the deemphasis network as shown on the application circuit. 8 13 l filt in r filt in 8 l filter in input to notch filter dc bias is supplied through the external filter components. 9 12 l filt ctr r filt ctr 9 l filter ctr op amp 20 k 20 k left filter and right filter center drives the center leg of a twint filter, varying the q. at strong signal, positive feedback narrows the notch, and there is little hf rolloff. at weak signal, negative feedback produces a broad notch and hf rolloff. 10 11 l matrix out r matrix out 10 l matix out track and hold output this is a unity gain operational amplifier output. the current is turned off by the blanking pulse. the capacitor holds output voltage constant until unblanked. internal feedback causes the output impedance to be low. 15 af blank in 15 4.7 k audio blank 4.7 k r l audio blank control the current to the output drivers is turned off.
mc13027 MC13122 15 motorola analog ic device data MC13122 pin function description (continued) description pin internal equivalent circuit name 16 pilot q 16 pilot q 3.0 v pilot q this is the output of a quadrature detector of a narrowband phase locked loop system. it is used to control the pilot detector circuitry. the pilot q is clamped to the 3.0 v reference when the blend voltage is pulled low. this results in faster pilot detection when a stereo station is tuned in. if the blend is not pulled low, the pilot q will drift up approximately 0.5 v when there is no pilot, and it will take longer to detect the pilot. the capacitor to ground is the loop filter. it sets the pilot loop bandwidth: if it is too large, the loop bandwidth maybe too small, and the pilot may not be reacquired if it is lost unless the blend pin is externally pulled low again. 17 pilot i 17 pilot i 3.0 v 47 k pilot i when the loop is locked to a 25 hz am stereo pilot, this is the output of a an inphase synchronous detector. the capacitor filters the output, which is used to drive the pilot indicator driver on pin 21. the time constant for the pilot indicator output is determined by this capacitor and the internal 47 k resistor. if the capacitor is too small, it can lead to pilot falsing due to noise. if the capacitor is too large, the acquisition time increases. the cap is charged to 3.0 v when the blend voltage is low to shorten lock time. 18 pilot det in 18 pilot det in v cc 3.0 v 47 k 39 k pilot detector input the pilot detector will detect a pilot tone between 24.4 and 25.6 hz. the pilot signal is fed from q detector through a low pass filter on pin 26. the audio signals from the q detector must be filtered out, so a lowpass filter is used. the capacitor in series with pin 18 blocks dc and prevents large low frequency transients from knocking the decoder out of stereo mode. 19 osc in 19 osc input v cc 3.0 v 10 k 22 k oscillator input the input impedance is 10 k, but the recommended circuit adds 3.9 k in parallel with this to control the capture range of the vco to be around 3.0 khz. using the recommended ceramic resonator. 20 osc out 20 osc feedback v cc 100 oscillator output the internal phase shift of the vco is 90 degrees, and the output impedance is low. it is designed to drive a resonant circuit with a 90 degree phase shift at the center frequency.
mc13027 MC13122 16 motorola analog ic device data MC13122 pin function description (continued) description pin internal equivalent circuit name 21 pilot indicator 10 21 27 k pilot indicator pilot indicator the maximum current is internally limited to protect the ic, but it should be operated with a current limiting resistor. 22 gnd 22 gnd ground use good practices to keep oscillator returns and rf bypasses to good copper near this point 23 blend cont 23 blend 330 3.0 v blend control there are pullup and pulldown currents provided to this pin. the external capacitor controls the rate of change of this voltage and 22 m f is recommended. this is an important voltage affecting many functions in the ic. 24 loop filt 24 loop filter 3.0 v 330 loop filter the phase detector is a current source, so only a single rc loop filter is needed for a second order loop. the internal 330 w resistor together with a 47 m f gives the correct corner frequency and damping for the proper operation on the decoder loop. the cap should be low leakage to avoid static phase error. 25 v cc 25 v cc v cc v cc the operating voltage is normally 8.0 to 10 v in car radios. the MC13122 will work from 6.0 to 10 v. 26 q detector 26 q det out 11 k 3.0 v q detector output this is a synchronous detector in quadrature with the 450 khz if signal. the output impedance is 11 k. this signal is normally used for input to the pilot detector and internally for the fast lock.
mc13027 MC13122 17 motorola analog ic device data MC13122 pin function description (continued) description pin internal equivalent circuit name 27 lr detector 27 lr det v cc 6.2 k lr detector this is similar to the q detector output but its level is controlled by the blend circuit. when the blend is active, the lr output is reduced in level by reducing the dc current until mono operation is reached. it operates in the same way as the blend circuit in fm stereo decoders. the bypass capacitor should be 1.0 nf as on pin 1 for optimum channel separation. 28 i detector 28 i det v cc 6.2 k i detector this is a synchronous detector in phase with the 450 khz if signal. it is used internally to generate the cos q signal and as an input to the signal quality detector. the bypass capacitor should be the same as the one on pin 1 for best separation and lowest stereo distortion.
mc13027 MC13122 18 motorola analog ic device data car radio application figure 6 shows a car radio circuit using a toko pretuned rf module. the rf module includes a 4 diode tracking circuit to eliminate mistracking between the oscillator and rf circuits over the 530 to 1700 khz am band. this is important for stereo performance because mistracking will cause mono distortion and will significantly reduce the stereo separation. the thb122 module contains the variable 10 khz notch filter. this module can be replaced with discrete components as shown in figure 8, using 1% resistors and 5% capacitors. some manufacturers add a pin diode attenuator at the antenna input. an example is shown in figure 7. the wb agc sensitivity can be adjusted by changing r4 in series with the wb agc input, pin 1. the internal input resistance is 15 k. r15, r17 and r19 are the blanker timing resistors. they were setup for this circuit and can be changed if desired. fl1 is a linear phase if filter . we recommend a gaussian (rounded) filter, such as sfg or sfh for lower distortion and better separation than one with a flatter amplitude response. the sfg types of filters have poorer selectivity than the ones with flat gdt (group delay time) so some compromise has been made on adjacent channel selectivity. the blanker can be disabled for testing by grounding the blanker agc on pin 2 in the mc13027. the blanker and mixer inputs must be biased from the 4.0 v regulator through a low dc resistance like the secondary winding of the rf coil. the receiver vco operates at 4 times the local oscillator frequency and is divided internally in the mc13027 so that both the mixer input and the lo out is the same as in other receivers. this receiver can be connected to an existing synthesizer. for am stereo, the synthesizer must have low phase noise. the motorola mc145173 is recommended. for bench testing of this receiver, the motorola mc145151 parallel input synthesizer may be useful. it will operate on 9.0 v and the phase detector can provide tuning voltage without a buffer amplifier. the ss (stopsense) output can be used for station searching and scanning. the best way to use it is to connect the ss signal to a comparator or ad converter in the control microprocessor. if pin 23 is grounded during searching by turning on q3, the ss voltage changes from less than 0.5 v to around 2.2 v when an rf threshold is exceeded, as is shown in the graph in figure 15. this system results in very reliable stopping on usable signals and fast detection of am stereo signals. after a station is detected, q3 should be turned off. this receiver is very easy to set up because the toko module is prealigned. the only adjustments are to tune t1 and t2 for maximum voltage of the ss out line or maximum audio with a weak signal. if desired, they can be changed slightly to maximize stereo separation. if different components are used, the blanker resistors can be setup as follows: ground pin 2 of the mc13027. apply a 1.0 m s pulse or 50 hz square wave of about 10 mv through a dummy antenna and synchronize an oscilloscope to the pulse generator. observe the signal at the mixer collector (pin 11). it should be a sine wave burst. remove the ground on pin 2 and adjust r15 so the burst is just suppressed. check the performance at the ends and middle of the band because the width might change due to rf circuit bandwidth. mix the pulse signal with a cw signal of about 300 m v with a power combiner and connect the oscilloscope to pin 7 or pin 14 of the MC13122. adjust r17 so the blanking starts at the beginning of the audio pulse and r19 so the audio blanking is just long enough to suppress the audio pulse. the audio blanking time should not be made longer than necessary because it will be more noticeable in the normal program. the effectiveness of the blanker can be determined in field testing by connecting a switch from pin 2 of the mc13027 to ground and bringing it outside the radio. figures 10 to 19 refer to the performance of the application circuit of figure 6.
mc13027 MC13122 19 motorola analog ic device data figure 6. a7nrest1370y t2 450 khz v cc wh8 gnd wh9 c27 c1 r18 c26 r16 c25 c33 r26 r12 c29 gnd r af out l af out lo out r6 r18 r9 c19 r3 q2 r2 r21 c13 c11 c18 1 2 3 4 5 6 7 8 vt r22 20 19 18 17 16 15 14 13 12 11 1 2 3 4 5 6 7 8 9 10 6 5 4 3 2 1 28 27 26 25 24 23 22 21 20 19 18 17 16 15 1 2 3 4 5 6 7 8 9 10 11 12 13 14 i det lr det q det v loop filt blend gnd pil ind osc out osc in pil det i pil i pil q a blk e det det in 3.0 v reg agc if in ss l out l filt in l filt ctr l mat out r mat out r filt ctr r filt in r out wb agc i blk agc blk fb 4.0 v reg rf gnd mix/blk in 4.0 v filt v lo lo out wb agc o aft af blk delt if out r filt if in if gnd rf blk mix out ch2 out ch2 cont ch2 in ch1 in ch1 cont ch1 out rf col rf v gnd mixer in mixer bias vt osc osc bias ant gnd ant c6 r19 r17 r15 c12 fl1 r4 q1 1 3 l1 mps6515 c e b 22 f m c8 1.0 f m 470 w 3309 d s g 0.01 100 k 3.0 mh r1 100 w c7 1.0 f m cc fl2 tmg522e 120 w 15 k 0.01 cc MC13122 ic2 mc13027 ic1 fl3 thb122 r7 22 k c22 47 f m c35 100 f m r8 12 k 1.0 n c28 1.0 n 1.0 n 0.01 3.3 k c9 0.1 150 k 33 k 680 k 0.01 1.8 k sfg450f o gi c2 10 f m c3 0.1 1.0 n c5 47 f m c14 10 f m wh11 wh3 c15 0.1 1 3 2 6 4 a7nres11148n t1 450 khz 1 3 2 6 4 ss out wh5 2.2 k 2.2 k r13 5.6 k r14 5.6 k .015 .015 wh4 wh6 1.0 n c32 1.0 n c21 0.1 100 k c28 47 f m c4 10 f m r5 4.7 k 2.2 k 3.9 k 51 r20 1.0 k c30 1.0 n stereo ca d1 x1 3.6 mhz c18 22 f m c34 1.0 n c24 47 f m c23 22 f m c16 47 f m c17 10 f m c31 1.0 f m r11 33 k search wh7 wh10 q3 mps6515 c e g wh12 af blk cc figure 6. amax chipset application circuit 10 w af blk wh13 wh2 wh1
mc13027 MC13122 20 motorola analog ic device data figure 7. rf pin diode figure 8. mc13027/MC13122 discrete rf and notch filters figure 9. overall selectivity of a typical receiver versus filter control voltage c57 0.01 c7 0.01 r51 820 r5 2.7 k r6 27 k q25 mmbt3906l q2 mmbt3904l r8 220 c18 0.1 c6 0.47 c5 68 m f r13 13 k c14 0.01 rf in agc ba585 d1 pin c56 0.047 r52 390 r4 82 r3 100 k c8 0.047 q1 mmbfj309l r7 3.3 k 1 wb agc in mc13027 2 agc l1 126ans 7594hm 1 3 60 overall response (db) audio frequency (khz) 0 10 20 30 40 50 70 80 1.5 2.0 3.0 4.0 5.0 6.0 8.0 10 15 20 30 v at pin 6 = 3.5 vdc 2.5 vdc 1.5 vdc response at pins 10 and 11 due to if selectivity total response at output pins 7 and 14 8 (13) 9 (12) 10 (11) 720 44.2 k 44.2 k 22.1 k 360 360 MC13122 pins filt in filt ctr filt out if/audio response at filter input + wb agc out 20
mc13027 MC13122 21 motorola analog ic device data 60 4.0 ss, stopsense, pin 6 (v) rf input level (db m v) 3.0 2.0 1.0 0 70 80 90 100 110 20 500 af output (mv) antenna input (db m v) 400 300 200 100 0 30 40 50 60 70 80 20 0 5.0 khz attenuation (db) antenna input (db m v) 5.0 10 15 20 25 30 40 50 60 70 80 20 50 400 hz s/n (db) antenna input (db m v) 42 34 26 18 10 30 40 50 60 70 80 20 40 separation (db) antenna input (db m v) 30 40 50 60 70 80 32 24 16 8.0 0 20 4.0 blend voltage, pin 23 (v) antenna input (db m v) 30 40 50 60 70 80 3.0 2.0 1.0 0 figure 10. blend voltage versus rf input level figure 11. separation versus rf input level figure 12. signal to noise versus rf input level figure 13. 5.0 khz attentuation versus rf input level figure 14. audio output level versus rf input level figure 15. stopsense voltage versus rf input level note: the graphs on this page were made using the 15/60 pf dummy antenna and the application circuit of figure 6. note: the radio stays in mono until the stereo signal is sufficiently large and then makes a smooth transition to stereo. this is similar to fm receivers with variable blend. note: the slightly abrupt change at around 25 db m v is due to the decoder switching into stereo. note: this curve shows the effect of the variable audio bandwidth control of the MC13122. it is due to the variable loading of the if coil and the variable 10 khz notch filter in the output. note: all the curves of performance versus rf input level were generated using the car radio receiver circuit shown in figure 6. using a 15/60 pf dummy antenna input and a 50% l only stereo signal. note: this measurement was made on the MC13122 alone with a 10 k series input resistor. it will enable the designer to determine the stopsense level if the gain of receiver rf section is known. note that if pin 23 is held low, the ss voltage on pin 6 rises from about 0.3 to 2.2 v over a small change in rf level. this can be used to generate a very reliable stop signal. if pin 23 is not held low, the ss voltage starts out at 2.2 v and rises slowly to a maximum of around 4.0 v. pin 23 = open pin 23 = grounded
mc13027 MC13122 22 motorola analog ic device data 0 9.0 agc voltage (v) rf level into pin 1 (mv) 8.0 6.0 4.0 2.0 0 1.0 2.0 3.0 4.0 5.0 6.0 7.0 5.0 3.0 1.0 10 1000 r19 (k w ) 100 10 1.0 33 100 330 1000 10 1000 af blanking time ( r15 (k w ) 100 10 1.0 33 100 330 1000 10 1000 af blanking delay ( r17 (k w ) 100 10 1.0 33 100 330 1000 figure 16. audio blanking delay versus r17 figure 17. rf blanking time versus r15 figure 18. audio blanking time versus r19 figure 19. wb agc output voltage (pin 20) versus rf input level note: this was measured by applying an rf signal through a capacitor directly to pin 1. the input resistance is 15 k, so the desired threshold can be increased by adding a resistor in series with the input. m s) m s) af blanking time ( m s)
mc13027 MC13122 23 motorola analog ic device data amax stereo chipset the rf module in the early development phase of this amax stereo chipset, motorola worked with toko america inc. to develop an rf tuning module. part number tmg522e was assigned and is available from toko now. this module provides the atrackedo tuning elements for the rf (t1 and t2 and associated capacitors and varicaps) and the vco (t3 et al). some radio designers may prefer to develop their own tuning system using discrete coils and components, but the toko approach offers good performance, compactness and ease of application. motorola recommends that every designer use this approach at least for initial system development and evaluation. as refinement of the application progressed, it was found that a modification of the tmg522e was needed which would reduce the amount of vco leakage into the mixer through the power supply connections. this modification is described below. motorola will work with toko to develop a new part number incorporating this change. in the meantime, it is necessary that the user perform these simple changes, because the radio circuits throughout this data sheet assume this modified design. modifying the tmg522e referring to figures 20 and 21, there are three simple steps to the modification: 1. cut the thin copper trace from pin 2 to pin 5 as shown. 2. cut the thin copper trace from pin 8 to the bottom of the 120 w resistor. removal of the resistor is optional. 3. connect a wire from pin 5 to the top of the 120 w resistor (or the upper pad for the resistor). figure 20. tmg522e schematic figure 21. tmg522e physical modifications add wire (3) cut (1) cut (2) 1 2 487 536 47 k 47 k 10 k t1 t2 t3 120 3.9 k cut trace (1) x x cut trace (2) add wire (3) +b gnd vt rf out osc low osc high 5 3.0 v rf in tmg522e 87654321 tmg522e add wire (3) cut (1) cut (2) 87654321
mc13027 MC13122 24 motorola analog ic device data figure 22. amax chipset printed circuit board (top view) wh6 vt osc + + + + + + + + + + + + c14 c5 c2 c11 c22 c35 wh11 wh3 fl2 l1 wh1 wh2 gnd ant q1 q2 q3 wh7 search c24 c23 c4 gnd t2 t1 fl1 wh4 l fl3 wh5 wh12 x1 c18 c31 wh10 gnd c16 c20 c17 rss wh13 v cc + c30 r12 r20 c29 r26 c34 ic2 r11 c28 c27 c1 r10 r8 r7 c8 r3 r1 c7 r2 c6 c13 ic1 r19 r17 c19 r5 c32 c33 r16 r13 c25 c12 c9 r9 r15 r21 c10 r22 c15 c3 r4 c26 r14 r18 c21 r6 figure 23. amax chipset printed circuit board (bottom view) wh9 wh8 d1
mc13027 MC13122 25 motorola analog ic device data figure 24. amax chipset printed circuit board (copper view)
mc13027 MC13122 26 motorola analog ic device data p suffix plastic package case 73803 issue e outline dimensions dw suffix plastic package case 751d04 (so20l) issue e notes: 1. dimensioning and tolerancing per ansi y14.5m, 1982. 2. controlling dimension: millimeter. 3. dimensions a and b do not include mold protrusion. 4. maximum mold protrusion 0.150 (0.006) per side. 5. dimension d does not include dambar protrusion. allowable dambar protrusion shall be 0.13 (0.005) total in excess of d dimension at maximum material condition. a b 20 1 11 10 s a m 0.010 (0.25) b s t d 20x m b m 0.010 (0.25) p 10x j f g 18x k c t seating plane m r x 45 dim min max min max inches millimeters a 12.65 12.95 0.499 0.510 b 7.40 7.60 0.292 0.299 c 2.35 2.65 0.093 0.104 d 0.35 0.49 0.014 0.019 f 0.50 0.90 0.020 0.035 g 1.27 bsc 0.050 bsc j 0.25 0.32 0.010 0.012 k 0.10 0.25 0.004 0.009 m 0 7 0 7 p 10.05 10.55 0.395 0.415 r 0.25 0.75 0.010 0.029 notes: 1. dimensioning and tolerancing per ansi y14.5m, 1982. 2. controlling dimension: inch. 3. dimension l to center of lead when formed parallel. 4. dimension b does not include mold flash. m l j 20 pl m b m 0.25 (0.010) t dim min max min max millimeters inches a 25.66 27.17 1.010 1.070 b 6.10 6.60 0.240 0.260 c 3.81 4.57 0.150 0.180 d 0.39 0.55 0.015 0.022 g 2.54 bsc 0.100 bsc j 0.21 0.38 0.008 0.015 k 2.80 3.55 0.110 0.140 l 7.62 bsc 0.300 bsc m 0 15 0 15 n 0.51 1.01 0.020 0.040 e 1.27 1.77 0.050 0.070 1 11 10 20 a seating plane k n f g d 20 pl t m a m 0.25 (0.010) t e b c f 1.27 bsc 0.050 bsc
mc13027 MC13122 27 motorola analog ic device data p suffix plastic package case 71002 issue b outline dimensions dw suffix plastic package case 751f04 (so28l) issue e min min max max millimeters inches dim a b c d f g j k m p r 17.80 7.40 2.35 0.35 0.41 0.23 0.13 0 10.05 0.25 18.05 7.60 2.65 0.49 0.90 0.32 0.29 8 10.55 0.75 0.701 0.292 0.093 0.014 0.016 0.009 0.005 0 0.395 0.010 0.711 0.299 0.104 0.019 0.035 0.013 0.011 8 0.415 0.029 1.27 bsc 0.050 bsc notes: 1. dimensioning and tolerancing per ansi y14.5m, 1982. 2. controlling dimension: millimeter. 3. dimension a and b do not include mold protrusion. 4. maximum mold protrusion 0.15 (0.006) per side. 5. dimension d does not include dambar protrusion. allowable dambar protrusion shall be 0.13 (0.005) total in excess of d dimension at maximum material condition. -a- -b- 114 15 28 -t- c seating plane 0.010 (0.25) b m m m j -t- k 26x g 28x d 14x p r x 45 f 0.010 (0.25) t a b m s s notes: 1. positional tolerance of leads (d), shall be within 0.25 (0.010) at maximum material condition, in relation to seating plane and each other. 2. dimension l to center of leads when formed parallel. 3. dimension b does not include mold flash. 1 seating plane 15 14 28 m a b k c n f g d h j l dim min max min max inches millimeters a 36.45 37.21 1.435 1.465 b 13.72 14.22 0.540 0.560 c 3.94 5.08 0.155 0.200 d 0.36 0.56 0.014 0.022 f 1.02 1.52 0.040 0.060 g 2.54 bsc 0.100 bsc h 1.65 2.16 0.065 0.085 j 0.20 0.38 0.008 0.015 k 2.92 3.43 0.115 0.135 l 15.24 bsc 0.600 bsc m 0 15 0 15 n 0.51 1.02 0.020 0.040
mc13027 MC13122 28 motorola analog ic device data motorola reserves the right to make changes without further notice to any products herein. motorola makes no warranty, representation or guarantee regarding the suitability of its products for any particular purpose, nor does motorola 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 consequential or incidental damages. atypicalo parameters which may be provided in motorola 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. motorola does not convey any license under its patent rights nor the rights of others. motorola 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 motorola product could create a situation where personal injury or death may occur. should buyer purchase or use motorola products for any such unintended or unauthorized application, buyer shall indemnify and hold motorola 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 unauthorized use, even if such claim alleges that motorola was negligent regarding the design or manufacture of the part. motorola and are registered trademarks of motorola, inc. motorola, inc. is an equal opportunity/affirmative action employer. how to reach us: usa / europe / locations not listed : motorola literature distribution; japan : nippon motorola ltd.; tatsumispdjldc, 6f seibubutsuryucenter, p.o. box 20912; phoenix, arizona 85036. 18004412447 or 6023035454 3142 tatsumi kotoku, tokyo 135, japan. 038135218315 mfax : rmfax0@email.sps.mot.com touchtone 6 022446609 asia / pacific : motorola semiconductors h.k. ltd.; 8b tai ping industrial park, internet : http://designnet.com 51 ting kok r oad, tai po, n.t., hong kong. 85226629298 mc13027/d
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