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operating temperature range dual conversion narrowband fm receivers ordering information p suffix plastic package case 724 order this document by mc13135/d dw suffix plastic package case 751e (so24l) 24 1 24 1 device package MC13135P mc13135dw t a = 40 to +85 c plastic dip so24l mc13136p mc13136dw plastic dip so24l 1 motorola analog ic device data
the mc13135/mc13136 are the second generation of single chip, dual conversion fm communications receivers developed by motorola. major improvements in signal handling, rssi and first oscillator operation have been made. in addition, recovered audio distortion and audio drive have improved. using motorola's mosaic ? 1.5 process, these receivers offer low noise, high gain and stability over a wide operating voltage range. both the mc13135 and mc13136 include a colpitts oscillator, vco tuning diode, low noise first and second mixer and lo, high gain limiting if, and rssi. the mc13135 is designed for use with an lc quadrature detector and has an uncommitted op amp that can be used either for an rssi buffer or as a data comparator. the mc13136 can be used with either a ceramic discriminator or an lc quad coil and the op amp is internally connected for a voltage buffered rssi output. these devices can be used as standalone vhf receivers or as the lower if of a triple conversion system. applications include cordless telephones, short range data links, walkietalkies, low cost land mobile, amateur radio receivers, baby monitors and scanners. ? complete dual conversion fm receiver antenna to audio output ? input frequency range 200 mhz ? voltage buffered rssi with 70 db of usable range ? low voltage operation 2.0 to 6.0 vdc (2 cell nicad supply) ? low current drain 3.5 ma typ ? low impedance audio output < 25 w ? vhf colpitts first lo for crystal or vco operation ? isolated tuning diode ? buffered first lo output to drive cmos pll synthesizer 23 22 21 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 24 af v cc 2 2nd lo v cc 1 1st lo varicap limiter demod 1st lo base 1st lo emitter 1st lo out v cc 1 2nd lo emitter 2nd lo base 2nd mixer out v ee limiter in decouple 1 decouple 2 rssi varicap c varicap a 1st mixer in 1 1st mixer in 2 1st mixer out v cc 2 2nd mixer in audio out op amp out op amp in op amp in + quad coil 23 22 21 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 24 af v cc2 2nd lo v cc 1 1st lo varicap limiter demod 1st lo base 1st lo emitter 1st lo out v cc 1 2nd lo emitter 2nd lo base 2nd mixer out v ee limiter in decouple 1 decouple 2 rssi varicap c varicap a 1st mixer in 1 1st mixer in 2 1st mixer out v cc 2 2nd mixer in audio out buffered rssi output op amp in limiter output quad input mc13135 mc13136 pin connections each device contains 142 active transistors. ? motorola, inc. 1996 rev 3
mc13135 mc13136 2 motorola analog ic device data maximum ratings rating pin symbol value unit power supply voltage 4, 19 v cc (max) 6.5 vdc rf input voltage 22 rf in 1.0 vrms junction temperature t j +150 c storage temperature range t stg 65 to +150 c recommended operating conditions rating pin symbol value unit power supply voltage 4, 19 v cc 2.0 to 6.0 vdc maximum 1st if f if1 21 mhz maximum 2nd if f if2 3.0 mhz ambient temperature range t a 40 to + 85 c electrical characteristics (t a = 25 c, v cc = 4.0 vdc, f o = 49.7 mhz, f mod = 1.0 khz, deviation = 3.0 khz, f 1st lo = 39 mhz, f 2nd lo = 10.245 mhz, if1 = 10.7 mhz, if2 = 455 khz, unless otherwise noted. all measurements performed in the test circuit of figure 1.) characteristic condition symbol min typ max unit total drain current no input signal i cc 4.0 6.0 madc sensitivity (input for 12 db sinad) matched input v sin 1.0 m vrms recovered audio v rf = 1.0 mv af o mvrms mc13135 170 220 300 mc13136 215 265 365 limiter output level v lim mvrms (pin 14, mc13136) 130 1st mixer conversion gain v rf = 40 dbm mx gain1 12 db 2nd mixer conversion gain v rf = 40 dbm mx gain2 13 db first lo buffered output v lo 100 mvrms total harmonic distortion v rf = 30 dbm thd 1.2 3.0 % demodulator bandwidth bw 50 khz rssi dynamic range rssi 70 db first mixer 3rd order intercept toi mix1 dbm (input) matched 17 unmatched 11 second mixer 3rd order matched toi mix2 dbm intercept (rf input) input 27 first lo buffer output resistance r lo w first mixer parallel input resistance r 722 w first mixer parallel input capacitance c 3.3 pf first mixer output impedance zo 330 w second mixer input impedance z i 4.0 k w second mixer output impedance zo 1.8 k w detector output impedance zo 25 w
mc13135 mc13136 3 motorola analog ic device data test circuit information although the mc13136 can be operated with a ceramic discriminator, the recovered audio measurements for both the mc13135 and mc13136 are made with an lc quadrature detector. the typical recovered audio will depend on the external circuit; either the q of the quad coil, or the rc matching network for the ceramic discriminator. on the mc13136, an external capacitor between pins 13 and 14 can be used with a quad coil for slightly higher recovered audio. see figures 10 through 13 for additional information. since adding a matching circuit to the rf input increases the signal level to the mixer, the third order intercept (toi) point is better with an unmatched input (50 w from pin 21 to pin 22). typical values for both have been included in the electrical characterization table. toi measurements were taken at the pins with a high impedance probe/spectrum analyzer system. the first mixer input impedance was measured at the pin with a network analyzer. figure 1. v cc 39 k 455 khz quad coil 39 k 0.1 12 16 15 14 13 af limiter demod figure 1b. mc13136 quad detector test circuit 24 0.2 m h rf input 62 pf 0.001 23 22 21 20 19 18 180 p 0.01 0.1 360 ceramic filter 10.7 mhz 455 khz quad coil 39 k 39 k 0.1 8.2 k 17 16 15 14 13 12 0.1 0.01 3 2 1 4 5 6 7 8 9 10 11 0.1 0.1 0.1 ceramic filter 455 khz 10.245 mhz xtal 39.0 mhz xtal 20 p 5.0 p 50 p 5.0 k 120 p 0.1 v cc 0.1 1.0 k 0.84 m h af v cc 2 2nd lo v cc 1 1st lo varicap limiter demod figure 1a. mc13135 test circuit
mc13135 mc13136 4 motorola analog ic device data n s+n, n, and amr (db) 10 130 rf in , rf input (dbm) f, frequency (mhz) 48.0 1.0 v b , varactor bias voltage (vdc) rssi output (mvdc, pin 12) 1400 140 rf input (dbm) power (dbm) 30 100 rf in , rf input (dbm) c p , equivalent parallel capacitance (pf) 25 0.5 v b , varactor bias voltage, v pin24 to v pin 23 (vdc) figure 2. supply current versus supply voltage figure 3. rssi output versus rf input figure 4. varactor capacitance, resistance versus bias voltage figure 5. oscillator frequency versus varactor bias i cc , supply current (ma) figure 6. signal levels versus rf input 6.0 0 v cc , supply voltage (v) figure 7. signal + noise, noise, and am rejection versus input power rf in = 49.7 mhz f mod = 1.0 khz f dev = 3.0 khz 5.0 4.0 3.0 2.0 1.0 0 1.0 2.0 3.0 4.0 5.0 6.0 7.0 8.0 v cc = 4.0 v rf in = 49.67 mhz f mod = 1.0 khz f dev = 3.0 khz 1200 1000 800 600 400 200 120 100 80 60 40 20 c p , f = 150 mhz 20 15 10 5.0 0 1.0 1.5 2.0 2.5 3.0 3.5 4.0 10 8.0 6.0 4.0 2.0 0 r p , equivalent parallel resistance (k ) w 47.5 47.0 46.5 46.0 45.5 45.0 r p , f = 50 mhz c p , f = 50 mhz r p , f = 150 mhz 2.0 3.0 4.0 5.0 6.0 90 80 70 60 50 40 30 20 10 10 30 50 70 first mixer output first mixer input 110 90 70 50 30 0 10 20 30 40 50 60 70 s + n s + n 30% am v cc = 4.0 vdc rf in = 49.67 mhz f mod = 1.0 khz f dev = 3.0 khz 5.0 p 0.61 m h 1st lo varicap 500 p 500 p 1.0 m w 0.2 m f v b 24 23 2 1 27 p second mixer output second mixer input
mc13135 mc13136 5 motorola analog ic device data ra, recovered audio (mv ) pp ra, recovered audio (mv ) , excess phase (degrees) f f dev , deviation (khz) thd, total harmonic distortion (%) 8.0 f dev , deviation (khz) mixer output (db) 20 100 rf input (dbm) 1000 3.0 2000 1.0 f dev , deviation (khz) figure 8. op amp gain and phase versus frequency figure 9. first mixer third order intermodulation (unmatched input) figure 10. recovered audio versus deviation for mc13135 figure 11. distortion versus deviation for mc13135 a v , gain (db) figure 12. recovered audio versus deviation for mc13136 50 10 k f, frequency (hz) figure 13. distortion versus deviation for mc13136 30 10 10 50 100 k 1.0 m 10 m 3rd order intermod products 0 20 40 60 80 100 80 60 40 20 0 1500 1000 1.0 r = 68 k w 800 600 400 200 0 30 80 120 160 200 280 240 phase gain desired products 3.0 5.0 7.0 9.0 pp r = 47 k w r = 39 k w 1.0 3.0 5.0 7.0 9.0 7.0 6.0 5.0 4.0 thd, total harmonic distortion (%) r = 68 k w r = 47 k w 4.0 5.0 6.0 7.0 8.0 9.0 r = c = 660 pf 10 8.0 6.0 4.0 2.0 0 f dev , deviation (khz) 3.0 4.0 5.0 6.0 7.0 8.0 9.0 r = 2.7 k w c = 270 pf r = 2.7 k w c = 270 pf r = 1.2 k w c = 100 pf r 13 v cc 455 khz quad coil toko 7mc8128z 500 0 3.0 2.0 r = 39 k w r 13 v cc murata 455 khz resonator cdb455c34 r 14 13 c v cc murata 455 khz resonator cdb455c34 r 14 13 c v cc r = 1.2 k w c = 100 pf 455 khz quad coil toko 7mc8128z r = c = 660 pf 0
mc13135 mc13136 6 motorola analog ic device data circuit description the mc13135/13136 are complete dual conversion receivers. they include two local oscillators, two mixers, a limiting if amplifier and detector, and an op amp. both provide a voltage buffered rssi with 70 db of usable range, isolated tuning diode and buffered lo output for pll operation, and a separate v cc pin for the first mixer and lo. improvements have been made in the temperature performance of both the recovered audio and the rssi. v cc two separate v cc lines enable the first lo and mixer to continue running while the rest of the circuit is powered down. they also isolate the rf from the rest of the internal circuit. local oscillators the local oscillators are grounded collector colpitts, which can be easily crystalcontrolled or vco controlled with the onboard varactor and external pll. the first lo transistor is internally biased, but the emitter is pinnedout and i q can be increased for high frequency or vco operation. the collector is not pinned out, so for crystal operation, the lo is generally limited to 3rd overtone crystal frequencies; typically around 60 mhz. for higher frequency operation, the lo can be provided externally as shown in figure 16. buffer an amplifier on the 1st lo output converts the singleended lo output to a differential signal to drive the mixer. capacitive coupling between the lo and the amplifier minimizes the effects of the change in oscillator current on the mixer. buffered lo output is pinnedout at pin 3 for use with a pll, with a typical output voltage of 320 mv pp at v cc = 4.0 v and with a 5.1 k resistor from pin 3 to ground. as seen in figure 14, the buffered lo output varies with the supply voltage and a smaller external resistor may be needed for low voltage operation. the lo buffer operates up to 60 mhz, typically. above 60 mhz, the output at pin 3 rolls off at approximately 6.0 db per octave. since most plls require about 200 mv pp drive, an external amplifier may be required. figure 14. buffered lo output voltage versus supply voltage 600 500 400 300 200 100 v cc , supply voltage (vdc) 2.5 3.0 3.5 4.0 4.5 5.0 5.5 r pin3 = 3.0 k w r pin3 = 5.1 k w output (mv ) pp mixers the first and second mixer are of similar design. both are double balanced to suppress the lo and input frequencies to give only the sum and difference frequencies out. this configuration typically provides 40 to 60 db of lo suppression. new design techniques provide improved mixer linearity and third order intercept without increased noise. the gain on the output of the 1st mixer starts to roll off at about 20 mhz, so this receiver could be used with a 21 mhz first if. it is designed for use with a ceramic filter, with an output impedance of 330 w . a series resistor can be used to raise the impedance for use with a crystal filter, which typically has an input impedance of 4.0 k w . the second mixer input impedance is approximately 4.0 k w ; it requires an external 360 w parallel resistor for use with a standard ceramic filter. limiting if amplifier and detector the limiter has approximately 110 db of gain, which starts rolling off at 2.0 mhz. although not designed for wideband operation, the bandwidth of the audio frequency amplifier has been widened to 50 khz, which gives less phase shift and enables the receiver to run at higher data rates. however, care should be taken not to exceed the bandwidth allowed by local regulations. the mc13135 is designed for use with an lc quadrature detector, and does not have sufficient drive to be used with a ceramic discriminator. the mc13136 was designed to use a ceramic discriminator, but can also be run with an lc quad coil, as mentioned in the test circuit information section. the data shown in figures 12 and 13 was taken using a murata cdb455c34 ceramic discriminator which has been specially matched to the mc13136. both the choice of discriminators and the external matching circuit will affect the distortion and recovered audio. rssi/op amp the received signal strength indicator (rssi) on the mc13135/13136 has about 70 db of range. the resistor needed to translate the rssi current to a voltage output has been included on the internal circuit, which gives it a tighter tolerance. a temperature compensated reference current also improves the rssi accuracy over temperature. on the mc13136, the op amp on board is connected to the output to provide a voltage buffered rssi. on the mc13135, the op amp is not connected internally and can be used for the rssi or as a data slicer (see figure 17c).
mc13135 mc13136 7 motorola analog ic device data figure 15. pll controlled narrowband fm receiver at 46/49 mhz figure 16. 144 mhz single channel application circuit 24 0.2 m h rf input 62 pf 0.001 23 22 21 20 19 18 150 pf 0.01 0.1 360 ceramic filter 10.7 mhz 455 khz quad coil 68 k 0.15 1.0 k 17 16 15 14 13 12 0.1 500 p 3 2 1 4 5 6 7 8 9 10 11 0.1 0.1 ceramic filter 455 khz 10.245 mhz xtal 27 p 5.0 p 50 p 5.1 k 120 p 0.1 v cc 47 k 0.68 m h af v cc 2 2nd lo v cc 1 1st lo varicap limiter demod recovered audio rssi output 10 k 500 p 100 k 1.0 0.01 fin1 0.1 0.1 2.7 k mc145166 3.0 p mps5179 0.05 m h 0.07 m h 39 p 1.0 m 5.1 k l3 12 p 3300 p to mixer 15 k 3300 p 470 p 470 l2 rf input 12 p q1 preamp for mc13135 at 144.455 mhz 1st lo external oscillator circuit l1 x1 43 p 68 p 5.6 k 1.0 k 100 p 15 k 0.82 m 1.0 m f 15 p v cc 1000p q1 470 mps5179 44.585 mhz 3rd overtone series resonant crystal 0.078 m h inductor (coilcraft part # 14602j08) f osc = 133.755 mhz 1.0 m f v cc osc out osc in pd1 pd2 ld d3 fin2 vdd d0 d1 d2 mc13135 q1 l2 l3 q1 x1 l1 vss + +
mc13135 mc13136 8 motorola analog ic device data figure 17a. single channel narrowband fm receiver at 49.7 mhz figure 17b. pc board component view figure 17c. optional data slicer circuit (using internal op amp) 24 0.2 m h rf input 50 w source 62 pf 0.001 23 22 21 20 19 18 150 p 0.01 0.1 360 ceramic filter 10.7 mhz 455 khz quad coil 10 k 39 k 0.15 1.0 k 17 16 15 14 13 12 0.1 2200 p 3 2 1 4 5 6 7 8 9 10 11 0.1 0.1 ceramic filter 455 khz 10.245 mhz xtal 39 mhz xtal 27 p 5.0 p 50 p 5.1 k 120 p 0.1 v cc 1.0 1.0 k 1.0 m h af v cc 2 2nd lo v cc 1 1st lo varicap limiter demod buffered lo output recovered audio rssi output 0.01 mc13135 0.001 v cc 1.0 m v in (pin 17) 20 k 20 k 16 15 14 10 k fsk data output 10 k notes: 1. 0.2 m h tunable (unshielded) inductor 2. 39 mhz series mode resonant 3rd overtone crystal 3. 1.5 m h tunable (shielded) inductor 4. 10.245 mhz fundamental mode crystal, 32 pf load 5. 455 khz ceramic filter, murata cfu 455b or equivalent 6. quadrature coil, toko 7mc8128z (7mm) or toko rmc2a6597hm (10mm) 7. 10.7 mhz ceramic filter, murata sfe10.7mja or equivalent figure 17. 5.1k 50p 51k 10k 10.7 mhz 0.1 150p 2200p 27p 5p 0.1 120p 0.1 0.1 0.1 39k 0.1 0.22 0.15 1.0k 360 0.01 62p .001 1.0 k 39 mhz 10.245 mhz 1.0 10 +4.7 +10 mc34119 mc13135 xt xt cf + cf 455 khz 6 3 4 5 2 1 7 + + 0.01 10k
mc13135 mc13136 9 motorola analog ic device data audio v ground rssi cc v cc2 speaker l.o. rf in mc13135 mc13136 figure 18. pc board solder side view figure 19. pc board component view (circuit side view) notes: 1. 0.2 m h tunable (unshielded) inductor 2. 39 mhz series mode resonant 3rd overtone crystal 3. 1.5 m h tunable (shielded) inductor 4. 10.245 mhz fundamental mode crystal, 32 pf load 5. 455 khz ceramic filter, murata cfu 455b or equivalent 6. ceramic discriminator, murata cdb455c34 or equivalent 7. 10.7 mhz ceramic filter, murata sfe10.7mja or equivalent 3.375 3.25 5.1k 50p 51k 10k 10.7 mhz 0.1 150p 2200p 27p 5p 0.1 120p 0.1 0.1 0.1 2.7k 0.1 0.22 0.15 1.0k 360 0.01 62p .001 1.0 k 39 mhz 10.245 mhz 1.0 10 +4.7 +10 mc34119 mc13136 xt xt cf + cf 455 khz 3 4 5 2 1 7 + 270p 6 0.01 10k
mc13135 mc13136 10 motorola analog ic device data v cc figure 20a. single channel narrowband fm receiver at 49.7 mhz figure 20b. optional audio amplifier circuit 0.22 10 k 51 k 10 4.7 10 speaker mc34119 1 2 3 4 8 7 6 5 recovered audio 24 0.2 m h rf input 50 w source 62 pf 0.001 23 22 21 20 19 18 150 pf 0.01 0.1 360 ceramic filter 10.7 mhz murata 455 khz resonator cdb455c34 10 k 2.7 k 0.15 1.0 k 17 16 15 14 13 12 0.1 2200 p 3 2 1 4 5 6 7 8 9 10 11 0.1 0.1 ceramic filter 455 khz 10.245 mhz xtal 39 mhz xtal 27 p 5.0 p 50 p 5.0 k 120 p 0.1 v cc 1.0 1.0 k 1.0 m h af v cc 2 2nd lo v cc 1 1st lo varicap limiter demod buffered lo output recovered audio rssi output 0.01 270 p mc13136 figure 20. + + + +
mc13135 mc13136 11 motorola analog ic device data figure 21. mc13135 internal schematic v cc 1 v cc 2 v ee v cc 2 v ee v cc 2 v ee v ee v cc 2 v ee v cc 2 v ee 1.0 k 21 5.0 p 12 16 17 7 4.0 k 4.0 k 6.0 k 6 5 20 14 15 bias 8.0 k 15 k 1 2 1.0 k 22 3 9 10 11 2.0 k 52 k 50 k 100 first lo first mixer second lo second mixer limiting if amplifier detector and audio amplifier 13 1.6 k 100 k op amp 12 k figure 21. this device contains 142 active transistors. 5.0 p 18
mc13135 mc13136 12 motorola analog ic device data figure 22. mc13136 internal schematic v cc 2 v ee v cc 2 v ee v cc 2 v ee v cc 2 v ee 5.0 p 12 16 17 14 15 bias 9 10 11 2.0 k 52 k 50 k limiting if amplifier detector and audio amplifier 13 100 k op amp figure 22. this device contains 142 active transistors. v cc 1 v cc 2 v ee v ee 1.0 k 21 7 4.0 k 4.0 k 6.0 k 6 5 20 8.0 k 15 k 1 2 1.0 k 22 3 100 first lo first mixer second lo second mixer 1.6 k 12 k 5.0 p 18
mc13135 mc13136 13 motorola analog ic device data outline dimensions p suffix plastic package case 72403 issue d dw suffix plastic package case 751e04 (so24l) issue e min min max max inches millimeters dim 1.265 0.270 0.175 0.020 0.060 0.012 0.140 15 0.040 0.050 bsc 0.100 bsc 0.300 bsc 1.27 bsc 2.54 bsc 7.62 bsc a b c d e f g j k l m n 31.25 6.35 3.69 0.38 1.02 0.18 2.80 0 0.51 32.13 6.85 4.44 0.51 1.52 0.30 3.55 15 1.01 1.230 0.250 0.145 0.015 0.040 0.007 0.110 0 0.020 notes: 1. chamfered contour optional. 2. dimension l to center of leads when formed parallel. 3. dimensioning and tolerancing per ansi y14.5m, 1982. 4. controlling dimension: inch. 112 13 24 a b c k n t seating plane g e f d 24 pl j 24 pl m note 1 l 0.25 (0.010) t a m m 0.25 (0.010) t b m m t 0.010 (0.25) a b m s s min min max max millimeters inches dim a b c d f g j k m p r 15.25 7.40 2.35 0.35 0.41 0.23 0.13 0 10.05 0.25 15.54 7.60 2.65 0.49 0.90 0.32 0.29 8 10.55 0.75 0.601 0.292 0.093 0.014 0.016 0.009 0.005 0 0.395 0.010 0.612 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. dimensions 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 112 24 13 t c k seating plane r x 45 g 22 pl p 12 pl 0.010 (0.25) b m m f j m d 24 pl
mc13135 mc13136 14 motorola analog ic device data notes
mc13135 mc13136 15 motorola analog ic device data notes
mc13135 mc13136 16 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 mc13135/d ?

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