device operating temperature range package semiconductor technical data wideband fsk receiver ordering information MC3356dw MC3356p t a = 40 to +85 c so20l plastic dip order this document by MC3356/d p suffix plastic package case 738 dw suffix plastic package case 751d (so20l) 20 1 2 3 4 5 6 7 8 9 10 19 18 17 16 15 14 13 12 11 rf ground osc emitter osc collector rf v cc mixer output if v cc limiter input limiter bias limiter bias quad bias rf input ground data output + comparator comparator squelch control quad input squelch status buffered output demodulator filter pin connections 1 motorola wireless semiconductor solutions rf and if device data
the MC3356 includes oscillator, mixer, limiting if amplifier, quadrature detector, audio buffer, squelch, meter drive, squelch status output, and data shaper comparator. the MC3356 is designed for use in digital data communciations equipment. ? data rates up to 500 kilobaud ? excellent sensitivity: 3 db limiting sensitivity excellent sensitivity: 30 m vrms @ 100 mhz ? highly versatile, full function device, yet few external parts are required ? down converter can be used independently e similar to ne602 figure 1. representative block diagram rf v cc rf ground 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 ceramic filter v cc quadrature detector tank limiter comparator meter current buffer + + data shaping comparator mixer osc rf input ground data output v cc squelch status hysteresis squelch adjust (meter) ? motorola, inc. 1996 rev 0 archive informa tion archive informa tion f r e e s c a l e s e m i c o n d u c t o r , i freescale semiconductor, inc. f o r m o r e i n f o r m a t i o n o n t h i s p r o d u c t , g o t o : w w w . f r e e s c a l e . c o m n c . . .
MC3356 2 motorola wireless semiconductor solutions rf and if device data maximum ratings rating symbol value unit power supply voltage v cc(max) 15 vdc operating power supply voltage range (pins 6, 10) v cc 3.0 to 9.0 vdc operating rf supply voltage range (pin 4) rf v cc 3.0 to 12.0 vdc junction temperature t j 150 c operating ambient temperature range t a 40 to + 85 c storage temperature range t stg 65 to + 150 c power dissipation, package rating p d 1.25 w electrical characteristics (v cc = 5.0 vdc, f o = 100 mhz, f osc = 110.7 mhz, d f = 75 khz, f mod = 1.0 khz, 50 w source, t a = 25 c, test circuit of figure 2, unless otherwise noted.) characteristics min typ max unit drain current total, rf v cc and v cc 20 25 madc input for 3 db limiting 30 m vrms input for 50 db quieting s + n n () 60 m vrms mixer voltage gain, pin 20 to pin 5 2.5 mixer input resistance, 100 mhz 260 w mixer input capacitance, 100 mhz 5.0 pf mixer/oscillator frequency range (note 1) 0.2 to 150 mhz if/quadrature detector frequency range (note 1) 0.2 to 50 mhz am rejection (30% am, rf v in = 1.0 mvrms) 50 db demodulator output, pin 13 0.5 vrms meter drive 7.0 m a/db squelch threshold 0.8 vdc note: 1. not taken in test circuit of figure 2; new component values required. figure 2. test circuit l1 110.7 mhz, 0.4 m h l1 7t #22, 3/16 form l1 w/slug & can l2 10.7 mhz, 1.5 m h l2 20t #30, 3/16 form l2 w/slug & can t1 murata t1 sfe10.7 ma5z or kyocera t1 kbf10.7mnma 100 mhz rf input 0.01 51 20 19 18 17 16 15 14 13 12 11 10 987654321 data output 10 k 47 k 0.01 390 k 47 k 130 k 3.3 k 3.0 k 3.3 k 0.1 470 pf 18 k 18 k 150 pf l2 0.01 330 0.01 t1 v cc 5 vdc 330 0.01 l1 5.6 pf 15 pf rf input ground data output comp(+) comp() squelch status squelch control demod out demod filter quad input rf gnd osc em. osc col. rf v cc mixer out v cc limiter input limiter bias limiter bias quad bias squelch status demod out archive informa tion archive informa tion f r e e s c a l e s e m i c o n d u c t o r , i freescale semiconductor, inc. f o r m o r e i n f o r m a t i o n o n t h i s p r o d u c t , g o t o : w w w . f r e e s c a l e . c o m n c . . .
MC3356 3 motorola wireless semiconductor solutions rf and if device data figure 3. output components of signal, noise, and distortion figure 4. meter current versus signal input 10 0 10 20 30 40 50 60 0.01 0.1 1.0 10 input (mvrms) r el at ive o utput ( db ) s + n + d f o = 100 mhz fm = 1.0 khz d f = 75 khz n + d n 700 600 500 400 300 200 100 0 0.010 0.1 1.0 10 100 1000 pin 20 input (mvrms) meter current, pin 14 ( a) m general description this device is intended for single and double conversion vhf receiver systems, primarily for fsk data transmission up to 500 k baud (250 khz). it contains an oscillator, mixer, limiting if, quadrature detector, signal strength meter drive, and data shaping amplifier. the oscillator is a common base colpitts type which can be crystal controlled, as shown in figure 1, or lc controlled as shown in the other figures. at higher v cc , it has been operated as high as 200 mhz. a mixer/oscillator voltage gain of 2 up to approximately 150 mhz, is readily achievable. the mixer functions well from an input signal of 10 m vrms, below which the squelch is unpredictable, up to about 10 mvrms, before any evidence of overload. operation up to 1.0 vrms input is permitted, but nonlinearity of the meter output is incurred, and some oscillator pulling is suspected. the am rejection above 10 mvrms is degraded. the limiting if is a high frequency type, capable of being operated up to 50 mhz. it is expected to be used at 10.7 mhz in most cases, due to the availability of standard ceramic resonators. the quadrature detector is internally coupled to the if, and a 5.0 pf quadrature capacitor is internally provided. the 3db limiting sensitivity of the if itself is approximately 50 m v (at pin 7), and the if can accept signals up to 1.0 vrms without distortion or change of detector quiescent dc level. the if is unusual in that each of the last 5 stages of the 6 state limiter contains a signal strength sensitive, current sinking device. these are parallel connected and buffered to produce a signal strength meter drive which is fairly linear for if input signals of 10 m v to 100 mvrms (see figure 4). a simple squelch arrangement is provided whereby the meter current flowing through the meter load resistance flips a comparator at about 0.8 vdc above ground. the signal strength at which this occurs can be adjusted by changing the meter load resistor. the comparator (+) input and output are available to permit control of hysteresis. good positive action can be obtained for if input signals of above 30 m vrms. the 130 k w resistor shown in the test circuit provides a small amount of hysteresis. its connection between the 3.3 k resistor to ground and the 3.0 k pot, permits adjustment of squelch level without changing the amount of hysteresis. the squelch is internally connected to both the quadrature detector and the data shaper. the quadrature detector output, when squelched, goes to a dc level approximately equal to the zero signal level unsquelched. the squelch causes the data shaper to produce a high (v cc ) output. the data shaper is a complete ``floating'' comparator, with back to back diodes across its inputs. the output of the quadrature detector can be fed directly to either input of this amplifier to produce an output that is either at v cc or v ee , depending upon the received frequency. the impedance of the biasing can be varied to produce an amplifier which afollowso frequency detuning to some degree, to prevent data pulse width changes. when the data shaper is driven directly from the demodulator output, pin 13, there may be distortion at pin 13 due to the diodes, but this is not important in the data application. a useful note in relating high/low input frequency to logic state: low if frequency corresponds to low demodulator output. if the oscillator is above the incoming rf frequency, then high rf frequency will produce a logic low (input to (+) input of data shaper as shown in figures 1 and 2). application notes the MC3356 is a high frequency/high gain receiver that requires following certain layout techniques in designing a stable circuit configuration. the objective is to minimize or eliminate, if possible, any unwanted feedback. archive informa tion archive informa tion f r e e s c a l e s e m i c o n d u c t o r , i freescale semiconductor, inc. f o r m o r e i n f o r m a t i o n o n t h i s p r o d u c t , g o t o : w w w . f r e e s c a l e . c o m n c . . .
MC3356 4 motorola wireless semiconductor solutions rf and if device data figure 5. application with fixed bias on data shaper 1 MC3356 rf in 1:2 0.01 20 19 18 17 16 15 14 13 12 11 10 987654 23 15 pf 5.6 pf data out 5.0 v 18 k 10 k 390 k 10 k car. det. out 0 v or 4.0 v 3.3 k 130 k 3.0 k 0.1 3.3 k 470 pf 15 k 18 k 150 pf 5.0 v + 5.0 to + 12 v 0.01 f o bead 4.0 v 180 0.01 82 0.1 cer. fil. 10.7 mhz 330 0.010.01 0.01 bead 0.1 rf input ground data output comp(+) comp() squelch status squelch control demod out demod filter quad input rf gnd osc em. osc col. rf v cc mixer out v cc limiter input limiter bias limiter bias quad bias 330 application notes (continued) shielding, which includes the placement of input and output components, is important in minimizing electrostatic or electromagnetic coupling. the MC3356 has its pin connections such that the circuit designer can place the critical input and output circuits on opposite ends of the chip. shielding is normally required for inductors in tuned circuits. the MC3356 has a separate v cc and ground for the rf and if sections which allows good external circuit isolation by minimizing common ground paths. note that the circuits of figures 1 and 2 have rf, oscillator, and if circuits predominantly referenced to the plus supply rails. figure 5, on the other hand, shows a suitable means of ground referencing. the two methods produce identical results when carefully executed. it is important to treat pin 19 as a ground node for either approach. the rf input should be ``grounded'' to pin 1 and then the input and the mixer/oscillator grounds (or rf v cc bypasses) should be connected by a low inductance path to pin 19. if and detector sections should also have their bypasses returned by a separate path to pin 19. v cc and rf v cc can be decoupled to minimize feedback, although the configuration of figure 2 shows a successful implementation on a common 5.0 v supply. once again, the message is: define a supply node and a ground node and return each section to those nodes by separate, low impedance paths. the test circuit of figure 2 has a 3 db limiting level of 30 m v which can be lowered 6 db by a 1:2 untuned transformer at the input as shown in figures 5 and 6. for applications that require additional sensitivity, an rf amplifier can be added, but with no greater than 20 db gain. this will give a 2.0 to 2.5 m v sensitivity and any additional gain will reduce receiver dynamic range without improving its sensitivity. although the test circuit operates at 5.0 v, the mixer/oscillator optimum performance is at 8.0 v to 12 v. a minimum of 8.0 v is recommended in high frequency applications (above 150 mhz), or in pll applications where the oscillator drives a prescaler. archive informa tion archive informa tion f r e e s c a l e s e m i c o n d u c t o r , i freescale semiconductor, inc. f o r m o r e i n f o r m a t i o n o n t h i s p r o d u c t , g o t o : w w w . f r e e s c a l e . c o m n c . . .
MC3356 5 motorola wireless semiconductor solutions rf and if device data figure 6. application with selfadjusting bias on data shaper rf in 1:2 0.01 20 19 18 17 16 15 14 13 12 11 data out 5.0 v 10 k car. det. out 0 v or 4.0 v 3.3 k 130 k 3.3 k 470 pf 15 k 18 k 150 pf rf input ground data output comp(+) comp() squelch status squelch control demod out demod filter quad input 1 470 k 470 pf 47 k 47 k 0.1 0.1 f = 10.7 1.5 m h application notes (continued) depending on the external circuit, inverted or noninverted data is available at pin 18. inverted data makes the higher frequency in the fsk signal a aoneo when the local oscillator is above the incoming rf. figure 5 schematic shows the comparator with hysteresis. in this circuit the dc reference voltage at pin 17 is about the same as the demodulated output voltage (pin 13) when no signal is present. this type circuit is preferred for systems where the data rates can drop to zero. some systems have a low frequency limit on the data rate, such as systems using the mc3850 acia that has a start or stop bit. this defines the low frequency limit that can appear in the data stream. figure 5 circuit can then be changed to a circuit configuration as shown in figure 6. in figure 6 the reference voltage for the comparator is derived from the demodulator output through a low pass circuit where t is much lower than the lowest frequency data rate. this and similar circuits will compensate for small tuning changes (or drift) in the quadrature detector. squelch status (pin 15) goes high (squelch off) when the input signal becomes greater than some preset level set by the resistance between pin 14 and ground. hysteresis is added to the circuit externally by the resistance from pin 14 to pin 15. archive informa tion archive informa tion f r e e s c a l e s e m i c o n d u c t o r , i freescale semiconductor, inc. f o r m o r e i n f o r m a t i o n o n t h i s p r o d u c t , g o t o : w w w . f r e e s c a l e . c o m n c . . .
MC3356 6 motorola wireless semiconductor solutions rf and if device data figure 7. internal schematic 59 4 3 2 20 1 6 7 9 8 19 5 14 15 11 17 18 16 10 12 13 135 135 135 135 135 135 135 34 135 225 49 47 48 505152 45 46 43 2.5 k 41 40 42 44 39 1.0 k 38 37 3433 3231 36 1.0 k 1.0 k 35 5.0 pf 30 29 10 k 10 k 10 k10 k 1.0 k 1.0 k 26 25 28 27 64 63 62 61 60 1.0 k 1.0 k 50 k 50 k 1.0 k 1.0 k 1.0 k 1.0 k 1.0 k 1.0 k 1.0 k 1.0 k 1.0 k 1.0 k 1.0 k 1.0 k 2423 2221 2019 1817 1615 1413 2.0 k 2.0 k 2.0 k 2.0 k 500 10 k 20 k 5.0 k 10 k 20 k 20 k 10 k 94 80 93 79 78 92 90 82 89 91 85 86 87 84 83 81 77 76 75 73 72 70 69 68 67 66 71 65 12 11 2 3 4 5 678 9 10 1.0 k 1.0 k 5.0 k 5.0 k 5.0 k 330 330 20 pf 53 54 55 56 57 58 1.0 k 1.0 k 5.0 k archive informa tion archive informa tion f r e e s c a l e s e m i c o n d u c t o r , i freescale semiconductor, inc. f o r m o r e i n f o r m a t i o n o n t h i s p r o d u c t , g o t o : w w w . f r e e s c a l e . c o m n c . . .
MC3356 7 motorola wireless semiconductor solutions rf and if device data p suffix plastic package case 73803 dw suffix plastic package case 751d03 (so20l) outline dimensions 0.050 bsc 0.100 bsc 0.300 bsc 1.27 bsc 2.54 bsc 7.62 bsc min minmax max millimeters inches dim 25.66 6.10 3.81 0.39 1.27 0.21 2.80 0 0.51 27.17 6.60 4.57 0.55 1.77 0.38 3.55 15 1.01 1.010 0.240 0.150 0.015 0.050 0.008 0.110 0 0.020 1.070 0.260 0.180 0.022 0.070 0.015 0.140 15 0.040 a b c d e f g j k l m n notes: 1. dimensioning and tolerancing per ansi y14.5m, 1982. 2. controlling dimension: inch. 3. dimension alo to center of lead when formed parallel. 4. dimension abo does not include mold flash. 5. 73802 obsolete, new standard 73803. a c k n e gf d 20 pl j 20 pl l m t seating plane 110 11 20 0.25 (0.010) t a m m 0.25 (0.010) t b m m b min minmax max millimeters inches dim a b c d f g j k m p r 0.510 0.299 0.104 0.019 0.035 0.012 0.009 7 0.415 0.029 0.499 0.292 0.093 0.014 0.020 0.010 0.004 0 0.395 0.010 12.95 7.60 2.65 0.49 0.90 0.32 0.25 7 10.55 0.75 12.65 7.40 2.35 0.35 0.50 0.25 0.10 0 10.05 0.25 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. 751d01, and 02 obsolete, new standard 751d03. 1.27 bsc 0.050 bsc a b p 10 pl 1 10 11 20 g t d 20 pl k c seating plane r x 45 m f j 0.25 (0.010) b m m 0.25 (0.010) t b a m s s archive informa tion archive informa tion f r e e s c a l e s e m i c o n d u c t o r , i freescale semiconductor, inc. f o r m o r e i n f o r m a t i o n o n t h i s p r o d u c t , g o t o : w w w . f r e e s c a l e . c o m n c . . .
MC3356 8 motorola wireless semiconductor solutions rf and if device data motorola reserves the right to make changes without further notice to any products herein. motorola makes no warranty, represe ntation or guarantee regarding the suitability of its products for any particular purpose, nor does motorola assume any liability arising out of the applicati on or use of any product or circuit, and specifically disclaims any and all liability, including without limitation consequential or incidental damages. atypicalo para meters 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 ope rating parameters, including atypicalso must be validated for each customer application by customer's technical experts. motorola does not convey any license under it s patent rights nor the rights of others. motorola products are not designed, intended, or authorized for use as components in systems intended for surgical imp lant 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 expens es, 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 : motorola japan ltd.; sps, technical information center, 3201, p.o. box 5405, denver, colorado 80217. 13036752140 or 18004412447 minamiaz abu. minatoku, tokyo 1068573 japan. 8 1334403569 technical information center: 18005216274 asia / pacific : motorola semiconductors h.k. ltd.; silicon harbour centre, 2, dai king street, tai po industrial estate, tai po, n.t., hong kong. 85226668334 home page : http://www.motorola.com/semiconductors/ MC3356/d ? archive informa tion archive informa tion f r e e s c a l e s e m i c o n d u c t o r , i freescale semiconductor, inc. f o r m o r e i n f o r m a t i o n o n t h i s p r o d u c t , g o t o : w w w . f r e e s c a l e . c o m n c . . .
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