1/5 low power narrow band fm if mc3361 n/d d e s c r i p t i o n outline drawing the mc3361 is designed for use in fm dual conversion com m unication. it contains a com p lete narrow band fm dem odulation sy stem operable to less than 2.0v supply voltage. this low power narrow band fm if sy stem provides the second converter, second if, dem odulator. filter am p and squelch circuitry for com m unications and scanning receivers. s o p - 1 6 fea t ure operating voltage range : 2.0v ~ 8.0v low current co nsum p tion i cc =3. 9 m a typ. (v cc = 4 . 0 v ) excellent input sensitivity (-3db lim iting = 2.6 vrm s ty p.) low num ber of external parts required operating frequency up to 60mhz pin configura tion dip-16 tiger electronic co.,ltd
mc3361n/d 2/5 absolute maximum ratings (ta=25 c) characteristic symbol value unit maximum supply voltage vcc (max) 10 v supply voltage range vcc 2.0~8.0 v detector input voltage v in(det) 1.0 vp-p rf input voltage v in(rf) 1.0 vrms mute function v mute -0.5~+5.0 vpeak junction temperature t j 150 c operating temperature topr -30~+70 c storage temperature tstg -65~150 c electrical characteristics (unless otherwise specified: ta=25 c, vcc=4v, fo=10.7mhz, fm=1khz, ? f= 3khz) characteristics symbol test conditions min typ max unit i cc1 squelch off (v 12 =2v) 2.9 3.9 4.9 squelch current i cc2 squelch on (v 12 =0v) 4.4 5.4 6.4 ma audio output voltage v out vin=10mvrms 130 160 200 mv rms input limiting voltage v in(lim) -3db limiting 2.0 6.0 v total harmonic distortion thd v out =170mvrms 0.8 % recovered output noise voltage v no no input signal 60 80 250 mv rms drop voltage af gain loss ? gv vcc=4v 2v -3 -0.6 db detector output resistance r out 450 ? signal to noise ratio s/n 36 67 db filter gain gv vin=5mvrms, f=10khz 40 50 db filter output dc voltage v o(dc) 1.0 1.3 1.6 v dc mute low resistance r on(mute) mute switch-on 10 ? mute high resistance r off(mute) mute switch-off 1.0 10 m ? scan control low v l(scan) mute off(v 12 =2v) 0 0.4 v dc scan control high v h(scan) mute on(v 12 =0v) 3.0 3.5 v dc trigger hysteresis v th squelch on/off 45 100 mv rms mixer conversion gain g v(mix) 28 db mixer input resistance r i(mix) 3.3 k ? mixer input capacitance c i(mix) 2.2 pf
mc3361n/d 3/5 block diagram and test circuit s q ue lc h tr igg e r w ith h y s t e r e s is mi x e r o s c illa t o r lim i te r am p d e m o d u la tor af am p f ilte r am p 10 pf 52 k 50 k 1. 8 k 1 2 5 6 7 3 4 1. 8 k 16 15 12 11 9 14 13 + 68 pf 22 0p f fl 1 mu r a t a cfu 45 5 d 10 . 2 4 5 mh z 0. 1 u f 0. 1 u f 20 k 8 0. 1 u f vc c 0 . 01 uf 51 10 k 1. 0 u f 51 0 1. 0 u f 10 47 0k 8. 2 k 0 . 01 uf af out f ilt e r i n fi l t er o u t sq s w sc a n au di o mi x e r i n p u t 10 . 7 m h z mu t e co n t ro l in p u t
mc3361n/d 4/5 applica t ion circuit typical performance characteristics
mc3361n/d 5/5
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